List of Accepted Plants of the British Isles 2007 H
| Accepted Latin Names | Common Name | In Kent? | Type | Kent ref. | Status | Authority | Record No. |
|---|---|---|---|---|---|---|---|
| Hackelia floribunda | Large-flowered Stickseed | Clement | A3 | 116--HAC--flo | (Lehm.) I.M. Johnst. | 0920006651 | |
| Hacquetia epipactis | Hacquetia | Clement | A3 | 107--HAC--epi | (Scop.) DC. | 0920006652 | |
| Hainardia cylindrica | One-glumed Hard-grass | Stace | A2 | 153--HAI--cyl | Ca | (Willd.) Greuter | 0920008077 |
| Haloragis micrantha | Creeping Raspwort | Yes | A1 | 79--1--1 | Ne | (Thunb.) R. Br. ex Siebold & Zucc. | 0920004377 |
| Hammarbya paludosa | Bog Orchid | Yes | A1 | 162--10--1 | N | (L.) Kuntze | 0920000951 |
| Haplophyllum tuberculatum | Clement | A3 | 101A--HAP--tub | (Forssk.) A. Juss. | 0920006653 | ||
| Harpachne schimperi | Clement | A3 | 153--HAR--sch | Hochst. ex A. Rich. | 0920006654 | ||
| Hebe 'Autumn Glory' | Clement | A3 | 124--17--- | 0920006655 | |||
| Hebe barkeri | Barker's Hebe | Yes | A1 | 124--17--4 | Ne | (Cockayne) A. Wall | 0920004322 |
| Hebe brachysiphon | Hooker's Hebe | Yes | A1 | 124--17--2 | Ne | Summerh. | 0920004319 |
| Hebe cupressoides | Clement | A3 | 124--17--cup | (Hook. f.) Cockayne & Allan | 0920006656 | ||
| Hebe dieffenbachii | Dieffenbach's Hebe | Yes | A1 | 124--17--3 | Ne | (Benth.) Cockayne & Allan | 0920004323 |
| Hebe elliptica x speciosa = H. x franciscana | Hedge Veronica | Yes | A1 | 124--17--ell x spec | Ne | (Eastw.) Souster | 0920004320 |
| Hebe leiophylla | Clement | A3 | 124--17--lei | (Cheeseman) Cockayne & Allan | 0920006657 | ||
| Hebe parviflora | Clement | A3 | 124--17--par | (J. Vahl) Cockayne & Allan | 0920006658 | ||
| Hebe salicifolia | Koromiko | Yes | A1 | 124--17--1 | Ne | (G. Forst.) Pennell | 0920004321 |
| Hebe salicifolia x elliptica = H. x lewisii | Lewis's Hebe | Yes | A1 | 124--17--1 x ell | Ne | (J.B. Armstr.) A. Wall | 0920007393 |
| Hebe stricta | Clement | A3 | 124--17--str | (Banks & Sol. ex Benth.) L.B. Moore | 0920006659 | ||
| Hebe x amabilis | Clement | A3 | 124--17--ama | (Cheeseman) Cockayne & Allan | 0920006660 | ||
| Hebenstretia dentata | Clement | A3 | 124A--HEB--den | L. | 0920006661 | ||
| Hedera algeriensis | Algerian Ivy | Yes S1 | A1 | 106--1--alg | Ne | Hibberd | 0920003468 |
| Hedera colchica | Persian Ivy | Yes | A1 | 106--1--1 | Ne | (K. Koch) K. Koch | 0920007394 |
| Hedera helix | Common Ivy | Page 41 | A1 | 106--1--2 | N | L. | 0920000952 |
| Hedera helix subsp. canariensis | Canary Ivy | Clement | A3 | 106--1--2--d | (Willd.) Cout. | 0920000952.4 | |
| Hedera helix subsp. poetarum | Yellow-berried Ivy | Clement | A2 | 106--1--2--c | (Bertol.) Nyman | 0920000952.3 | |
| Hedera hibernica | Atlantic Ivy | Yes S3 | A1 | 106--1--hib | N | (G. Kirch.) Bean | 0920000952.2 |
| Hedypnois cretica | Scaly Hawkbit | Stace | A2 | 135--HED--cre | Ca | (L.) Dum. Cours. | 0920008081 |
| Hedysarum coronarium | Italian Sainfoin | Clement | A3 | 77--HED--cor | L. | 0920006663 | |
| Hedysarum glomeratum | Clement | A3 | 77--HED--glo | F. Dietr. | 0920006664 | ||
| Hedysarum spinosissimum | Clement | A3 | 77--HED--spi | L. | 0920006665 | ||
| Helenium autumnale | Sneezeweed | Yes | A1 | 135--85--1 | Ne | L. | 0920007395 |
| Helenium quadridentatum | Clement | A3 | 135--85--qua | Labill. | 0920006666 | ||
| Helianthemum apenninum | White Rock-rose | Yes | A1 | 56--2--2 | N | (L.) Mill. | 0920000953 |
| Helianthemum nummularium | Common Rock-rose | Page 41 | A1 | 56--2--1 | N | (L.) Mill. | 0920000955 |
| Helianthemum nummularium x apenninum = H. x sulphureum | Yes | A1 | 56--2--1 x 2 | Willd. ex Schltdl. | 0920002690 | ||
| Helianthemum oelandicum | Hoary Rock-rose | Yes S1 | A1 | 56--2--3 | N | (L.) Dum. Cours. | 0920000954 |
| Helianthemum oelandicum subsp. incanum | Yes S1 | A1 | 56--2--3--a | (Willk.) G. L¢pez | 0920000954.1 | ||
| Helianthemum oelandicum subsp. levigatum | Yes S1 | A1 | 56--2--3--c | (M. Proctor) D.H. Kent | 0920000954.2 | ||
| Helianthemum oelandicum subsp. piloselloides | Yes S1 | A1 | 56--2--3--b | (Lapeyr.) Greuter & Burdet | 0920000954.3 | ||
| Helianthemum pilosum | Clement | A3 | 56--2--pil | (L.) Pers. | 0920006667 | ||
| Helianthus angustifolius | Swamp Sunflower | Clement | A3 | 135--79--ang | L. | 0920006668 | |
| Helianthus annuus | Sunflower | Yes | A1 | 135--79--1 | Ne | L. | 0920000957 |
| Helianthus annuus x decapetalus = H. x multiflorus | Thin-leaved Sunflower | Yes | A1 | 135--79--1 x dec | Ne | L. | 0920007396 |
| Helianthus argophyllus | Silver-leaf Sunflower | Clement | A3 | 135--79--arg | Torr. & A. Gray | 0920006669 | |
| Helianthus bolanderi | Bolander's Sunflower | Clement | A3 | 135--79--bol | A. Gray | 0920006670 | |
| Helianthus debilis | Clement | A3 | 135--79--deb | Nutt. | 0920005629 | ||
| Helianthus decapetalus | Thin-leaved Sunflower | Clement | A3 | 135--79--dec | L. | 0920000958 | |
| Helianthus divaricatus | Rough Sunflower | Clement | A3 | 135--79--div | L. | 0920006671 | |
| Helianthus hirsutus | Bristly Sunflower | Clement | A3 | 135--79--hir | Raf. | 0920006672 | |
| Helianthus maximilianii | Maximilian's Sunflower | Clement | A3 | 135--79--max | Schrad. | 0920006673 | |
| Helianthus petiolaris | Lesser Sunflower | Stace | A2 | 135--79--pet | Ca | Nutt. | 0920008082 |
| Helianthus strumosus | Pale-leaved Sunflower | Clement | A3 | 135--79--str | L. | 0920006674 | |
| Helianthus tuberosus | Jerusalem Artichoke | Yes | A1 | 135--79--2 | Ne | L. | 0920000960 |
| Helianthus tuberosus x pauciflorus = H. x laetiflorus | Perennial Sunflower | Yes S2 | A1 | 135--79--2 x pau | Ne | Pers. | 0920004430 |
| Helichrysum apiculatum | Yellow-buttons | Clement | A3 | 135--34--api | (Labill.) D. Don | 0920006675 | |
| Helichrysum bellidioides | New Zealand Everlastingflower | Yes | A1 | 135--34--1 | Ne | (G. Forst.) Willd. | 0920007397 |
| Helichrysum bracteatum | Strawflower | Clement | A3 | 135--34--bra | (Vent.) Andrews | 0920008083 | |
| Helichrysum capillaceum | Clement | A3 | 135--34--cap | (Thunb.) Less. | 0920006676 | ||
| Helichrysum expansum | Clement | A3 | 135--34--exp | (Thunb.) Less. | 0920006677 | ||
| Helichrysum italicum | Curry-plant | Clement | A3 | 135--34--ita | (Thunb.) Less. | 0920004154 | |
| Helichrysum odoratissimum | Clement | A3 | 135--34--odo | (L.) Less. | 0920006678 | ||
| Helichrysum petiolare | Silver-bush Everlastingflower | Yes S2 | A1 | 135--34--pet | Hilliard & B.L. Burtt | 0920004221 | |
| Helichrysum stoechas | Clement | A3 | 135--34--sto | (L.) Moench | 0920006679 | ||
| Helictotrichon bromoides | Clement | A3 | 153--26--bro | (Gouan) C.E. Hubb. | 0920006680 | ||
| Helictotrichon neesii | Swamp Wallaby-grass | Stace | A2 | 153--26--nee | Ca | (Steudel) Stace | 0920009175 |
| Helictotrichon pratense | Meadow Oat-grass | Page 41 | A1 | 153--26--2 | N | (L.) Besser | 0920000961 |
| Helictotrichon pubescens | Downy Oat-grass | Page 41 | A1 | 153--26--1 | N | (Huds.) Pilg. | 0920000962 |
| Helictotrichon recurvatum | Clement | A3 | 153--26--rec | (Swallen) Cope & Ryves | 0920006681 | ||
| Helictotrichon turgidulum | Clement | A3 | 153--26--tur | (Stapf) Schweick. | 0920006682 | ||
| Heliopsis helianthoides | Rough Oxeye | Clement | A3 | 135--HEL--hel | (L.) Sweet | 0920006683 | |
| Heliotropium amplexicaule | Summer Heliotrope | Clement | A3 | 116--HEL--amp | J. Vahl | 0920006684 | |
| Heliotropium arborescens | Cherry-pie | Clement | A3 | 116--HEL--arb | L. | 0920006685 | |
| Heliotropium curassavicum | Seaside Heliotrope | Clement | A3 | 116--HEL--cur | L. | 0920006686 | |
| Heliotropium europaeum | European Turn-sole | Clement | A3 | 116--HEL--eur | L. | 0920004081 | |
| Helleborus argutifolius | Corsican Hellebore | Yes S1 | A1 | 28--3--arg | Ne | Viv. | 0920003469 |
| Helleborus dumetorum | Clement | A3 | 28--3--dum | Waldst. & Kit. | 0920006687 | ||
| Helleborus foetidus | Stinking Hellebore | Page 41 | A1 | 28--3--1 | N | L. | 0920000963 |
| Helleborus orientalis | Lenten-rose | Yes | A1 | 28--3--3 | Ne | Lam. | 0920007398 |
| Helleborus viridis | Green Hellebore | Page 41 | A1 | 28--3--2 | ?N | L. | 0920000964 |
| Helleborus viridis subsp. occidentalis | Yes | A1 | 28--3--2--a | (Reut.) Schiffn. | 0920000964 | ||
| Helleborus x hybridus | Hybrid Lenten-rose | Clement | A3 | 28--3--hyb | Voss | 0920006688 | |
| Hemerocallis citrina | Citron Day-lily | Clement | A3 | 158--5--cit | Baroni | 0920006689 | |
| Hemerocallis fulva | Orange Day-lily | Yes | A1 | 158--5--1 | Ne | (L.) L. | 0920004452 |
| Hemerocallis lilioasphodelus | Yellow Day-lily | Yes | A1 | 158--5--2 | Ne | L. | 0920004453 |
| Hemizonia fasciculata | Fascicled Spikeweed | Clement | A3 | 135--HEM--fas | (DC.) Torr. & A. Gray | 0920006690 | |
| Hemizonia fitchii | Fitch's Spikeweed | Clement | A3 | 135--HEM--fit | A. Gray | 0920006691 | |
| Hemizonia kelloggii | Kellogg's Spikeweed | Clement | A3 | 135--HEM--kel | Greene | 0920005675 | |
| Hemizonia pungens | Common Spikeweed | Clement | A3 | 135--HEM--pun | Torr. & A. Gray | 0920008087 | |
| Hemizonia ramosissima | Slender Spikeweed | Clement | A3 | 135--HEM--ram | Benth. | 0920006692 | |
| Hepatica nobilis | Liverleaf | Yes | A1 | 28--10--1 | Ne | Schreb. | 0920007399 |
| Heracleum canescens | Clement | A3 | 107--41--can | Lindl. | 0920006693 | ||
| Heracleum mantegazzianum | Giant Hogweed | Page 41 | A1 | 107--41--2 | Ne | Sommier & Levier | 0920000966 |
| Heracleum sphondylium | Hogweed | Page 41 | A1 | 107--41--1 | N | L. | 0920000968 |
| Heracleum sphondylium subsp. flavescens | Yes S2 | A1 | 107--41--1--b | (Willd.) So¢ | 0920000968.1 | ||
| Heracleum sphondylium subsp. sphondylium | Yes | A1 | 107--41--1--a | 0920000968.2 | |||
| Heracleum sphondylium x mantegazzianum | Yes | A1 | 107--41--1 x 2 | 0920002745 | |||
| Herminium monorchis | Musk Orchid | Yes | A1 | 162--12--1 | N | (L.) R. Br. | 0920000969 |
| Hermodactylus tuberosus | Snake's-head Iris | Yes | A1 | 159--4--1 | Ne | (L.) Mill. | 0920000970 |
| Herniaria ciliolata | Fringed Rupturewort | Yes | A1 | 46--13--2 | N | Melderis | 0920000971 |
| Herniaria ciliolata subsp. ciliolata | Yes | A1 | 46--13--2--a | 0920000971.1 | |||
| Herniaria ciliolata subsp. subciliata | Yes | A1 | 46--13--2--b | (Bab.) Chaudhri | 0920000971.2 | ||
| Herniaria glabra | Smooth Rupturewort | Yes | A1 | 46--13--1 | N | L. | 0920000973 |
| Herniaria hirsuta | Hairy Rupturewort | Yes | A1 | 46--13--3 | Ne | L. | 0920000974 |
| Hesperis laciniata | Clement | A3 | 62--8--lac | All. | 0920008088 | ||
| Hesperis matronalis | Dame's-violet | Page 41 | A1 | 62--8--1 | Ne | L. | 0920000975 |
| Heterorhachis aculeata | Clement | A3 | 135--HTR--acu | (Burm. f.) Roessler | 0920006694 | ||
| Heterotheca subaxillaris | Camphorweed | Clement | A3 | 135--HET--sub | (Lam.) Britton & Rusby | 0920006695 | |
| Heuchera sanguinea | Coralbells | Yes | A1 | 74--6--1 | Ne | Engelm. | 0920007400 |
| Heuchera x brizoides | Clement | A3 | 74--6--bri | hort. ex Lemoine | 0920006696 | ||
| Heuchera x brizoides x Tiarella cordifolia = x Heucherella tiarelloides | Clement | A3 | 74--6 x TIA--bri x cor | (Lemoine) H.R. Wehrh. ex Stearn | 0920009099 | ||
| Hibiscus syriacus | Syrian Ketmia | Clement | A3 | 53--HIB--syr | L. | 0920005554 | |
| Hibiscus trionum | Bladder Ketmia | Stace | A2 | 53--HIB--tri | Ca | L. | 0920008089 |
| Hieracium acamptum | Yes | A1 | 135--28--22 | P.D. Sell & C. West | 0920003000 | ||
| Hieracium acuminatum | Yes | A1 | 135--28--69 | Jord. | 0920003205 | ||
| Hieracium aggregatum | Yes | A1 | 135--28--96 | Backh. f. | 0920003002 | ||
| Hieracium alpinum | Yes | A1 | 135--28--247 | L. | 0920003003 | ||
| Hieracium amplexicaule | Yes | A1 | 135--28--188 | L. | 0920003004 | ||
| Hieracium ampliatum | Yes | A1 | 135--28--195 | (W.R. Linton) Ley | 0920003005 | ||
| Hieracium anfractiforme | Yes | A1 | 135--28--216 | E.S. Marshall | 0920003006 | ||
| Hieracium anglicum | Yes | A1 | 135--28--192 | Fr. | 0920003007 | ||
| Hieracium anguinum | Yes | A1 | 135--28--97 | (W.R. Linton) Roffey | 0920003009 | ||
| Hieracium angustatiforme | Yes | A1 | 135--28--150 | P.D. Sell & C. West | 0920003010 | ||
| Hieracium angustatum | Yes | A1 | 135--28--152 | (Lindeb.) Lindeb. | 0920003008 | ||
| Hieracium angustisquamum | Yes | A1 | 135--28--146 | (Pugsley) Pugsley | 0920003011 | ||
| Hieracium argenteum | Yes | A1 | 135--28--153 | Fr. | 0920003012 | ||
| Hieracium asteridiophyllum | Yes | A1 | 135--28--117 | P.D. Sell & C. West | 0920003014 | ||
| Hieracium attenuatifolium | Yes | A1 | 135--28--48 | P.D. Sell & C. West | 0920003021 | ||
| Hieracium auratiflorum | Yes | A1 | 135--28--102 | Pugsley | 0920003016 | ||
| Hieracium australius | Yes | A1 | 135--28--52 | (Beeby) Pugsley | 0920003017 | ||
| Hieracium backhousei | Yes | A1 | 135--28--238 | F. Hanb. | 0920003018 | ||
| Hieracium bakerianum | Yes | A1 | 135--28--9 | Pugsley | 0920003019 | ||
| Hieracium basalticola | Yes | A1 | 135--28--175 | Pugsley | 0920003020 | ||
| Hieracium borreri | Yes | A1 | 135--28--38 | Syme | 0920003025 | ||
| Hieracium breadalbanense | Yes | A1 | 135--28--88 | F. Hanb. | 0920003026 | ||
| Hieracium breve | Yes | A1 | 135--28--56 | Beeby | 0920003027 | ||
| Hieracium brigantum | Yes | A1 | 135--28--166 | (F. Hanb.) Roffey | 0920003028 | ||
| Hieracium britanniciforme | Yes | A1 | 135--28--180 | Pugsley | 0920003029 | ||
| Hieracium britannicum | Yes | A1 | 135--28--179 | F. Hanb. | 0920003031 | ||
| Hieracium cacuminum | Yes | A1 | 135--28--151 | (Ley) Ley | 0920003033 | ||
| Hieracium caesiomurorum | Yes | A1 | 135--28--83 | Lindeb. | 0920003034 | ||
| Hieracium caesionigrescens | Yes | A1 | 135--28--59 | Fr. ex Stenstr. | 0920003030 | ||
| Hieracium calcaricola | Yes | A1 | 135--28--17 | (F. Hanb.) Roffey | 0920003035 | ||
| Hieracium caledonicum | Yes | A1 | 135--28--147 | F. Hanb. | 0920003036 | ||
| Hieracium calenduliflorum | Yes | A1 | 135--28--232 | Backh. f. | 0920003037 | ||
| Hieracium callistophyllum | Yes | A1 | 135--28--211 | F. Hanb. | 0920003039 | ||
| Hieracium calvum | Yes S1 | A1 | 135--28--cal | P.D. Sell & D.J. Tennant | |||
| Hieracium cambricogothicum | Yes | A1 | 135--28--20 | Pugsley | 0920003041 | ||
| Hieracium cambricum | Yes | A1 | 135--28--155 | (Baker) F. Hanb. | 0920003042 | ||
| Hieracium camptopetalum | Yes | A1 | 135--28--128 | (F. Hanb.) P.D. Sell & C. West | 0920003043 | ||
| Hieracium candelabrae | Yes | A1 | 135--28--124 | W.R. Linton | 0920003044 | ||
| Hieracium cantianum | Yes | A1 | 135--28--23 | F. Hanb. | 0920003045 | ||
| Hieracium cardiophyllum | Yes | A1 | 135--28--139 | Jord. ex Sudre | 0920003038 | ||
| Hieracium carneddorum | Yes | A1 | 135--28--157 | Pugsley | 0920003046 | ||
| Hieracium carpathicum | Yes | A1 | 135--28--40 | Besser | 0920003050 | ||
| Hieracium centripetale | Yes | A1 | 135--28--215 | F. Hanb. | 0920003047 | ||
| Hieracium cheriense | Yes | A1 | 135--28--68 | Jord. ex Boreau | 0920003048 | ||
| Hieracium chloranthum | Yes | A1 | 135--28--141 | Pugsley | 0920003049 | ||
| Hieracium chondrillifolium | Clement | A3 | 135--28--cho | Fr. | 0920006697 | ||
| Hieracium chrysolorum | Yes | A1 | 135--28--206 | P.D. Sell & C. West | 0920003062 | ||
| Hieracium cillense | Yes | A1 | 135--28--164 | Pugsley | 0920003051 | ||
| Hieracium cinderella | Yes | A1 | 135--28--135 | (Ley) Ley | 0920003052 | ||
| Hieracium clovense | Yes | A1 | 135--28--207 | E.F. Linton | 0920003053 | ||
| Hieracium completum | Yes S1 | A1 | 135--28--com | P.D. Sell & C. West | |||
| Hieracium cravoniense | Yes | A1 | 135--28--60 | (F. Hanb.) Roffey | 0920003055 | ||
| Hieracium crebridentiforme | Yes | A1 | 135--28--103 | Pugsley | 0920003056 | ||
| Hieracium cremnanthes | Yes | A1 | 135--28--226 | (F. Hanb.) Pugsley | 0920003057 | ||
| Hieracium cumbriense | Yes | A1 | 135--28--201 | F. Hanb. | 0920003058 | ||
| Hieracium cuneifrons | Yes | A1 | 135--28--87 | (Ley ex W.R. Linton) Pugsley | 0920003059 | ||
| Hieracium cuspidens | Yes | A1 | 135--28--217 | P.D. Sell & C. West | 0920003065 | ||
| Hieracium cyathis | Yes | A1 | 135--28--160 | (Ley) W.R. Linton | 0920003060 | ||
| Hieracium cymbifolium | Yes | A1 | 135--28--109 | Purchas | 0920003061 | ||
| Hieracium dasythrix | Yes | A1 | 135--28--203 | (E.F. Linton) Pugsley | 0920003063 | ||
| Hieracium decolor | Yes | A1 | 135--28--159 | (W.R. Linton) Ley | 0920003064 | ||
| Hieracium dewarii | Yes | A1 | 135--28--41 | Syme | 0920003066 | ||
| Hieracium diaphanoides | Yes | A1 | 135--28--70 | Lindeb. | 0920003067 | ||
| Hieracium diaphanum | Yes | A1 | 135--28--72 | Fr. | 0920003068 | ||
| Hieracium dicella | Yes | A1 | 135--28--176 | P.D. Sell & C. West | 0920003069 | ||
| Hieracium difficile | Yes | A1 | 135--28--53 | P.D. Sell & C. West | 0920003266 | ||
| Hieracium dilectum | Yes | A1 | 135--28--46 | P.D. Sell & C. West | 0920003267 | ||
| Hieracium dipteroides | Yes | A1 | 135--28--85 | Dahlst. | 0920003070 | ||
| Hieracium discophyllum | Yes | A1 | 135--28--118 | P.D. Sell & C. West | 0920003268 | ||
| Hieracium dissimile | Yes | A1 | 135--28--218 | (Lindeb.) Lindeb. ex Elfstr. | 0920003256 | ||
| Hieracium diversidens | Yes | A1 | 135--28--220 | P.D. Sell & C. West | 0920003254 | ||
| Hieracium dovrense | Yes | A1 | 135--28--51 | Fr. | 0920003072 | ||
| Hieracium drummondii | Yes | A1 | 135--28--13 | Pugsley | 0920003074 | ||
| Hieracium duriceps | Yes | A1 | 135--28--116 | F. Hanb. | 0920003075 | ||
| Hieracium eboracense | Yes | A1 | 135--28--19 | Pugsley | 0920003076 | ||
| Hieracium ebudicum | Yes | A1 | 135--28--171 | Pugsley | 0920003077 | ||
| Hieracium eucallum | Yes | A1 | 135--28--172 | P.D. Sell & C. West | 0920003264 | ||
| Hieracium eustales | Yes | A1 | 135--28--227 | E.F. Linton | 0920003079 | ||
| Hieracium eustomon | Yes | A1 | 135--28--185 | (E.F. Linton) Roffey | 0920003080 | ||
| Hieracium eximium | Yes | A1 | 135--28--241 | Backh. f. | 0920003081 | ||
| Hieracium exotericum | Yes | A1 | 135--28--140 | Jord. ex Boreau | 0920004498 | ||
| Hieracium flocculosum | Yes | A1 | 135--28--197 | Backh. f. | 0920003084 | ||
| Hieracium fratrum | Yes | A1 | 135--28--178 | Pugsley | 0920003085 | ||
| Hieracium fulvocaesium | Yes | A1 | 135--28--81 | Pugsley | 0920003086 | ||
| Hieracium glanduliceps | Yes | A1 | 135--28--73 | P.D. Sell & C. West | 0920003269 | ||
| Hieracium glandulidens | Yes | A1 | 135--28--213 | P.D. Sell & C. West | 0920003257 | ||
| Hieracium globosiflorum | Yes | A1 | 135--28--236 | Pugsley | 0920003088.1 | ||
| Hieracium gothicoides | Yes | A1 | 135--28--31 | Pugsley | 0920003089 | ||
| Hieracium gougetianum | Yes | A1 | 135--28--113 | Gren. & Godr. | 0920003270 | ||
| Hieracium gracilifolium | Yes | A1 | 135--28--205 | (F. Hanb.) Pugsley | 0920003091 | ||
| Hieracium grandidens | Yes | A1 | 135--28--138 | Dahlst. | 0920003092 | ||
| Hieracium graniticola | Yes | A1 | 135--28--234 | W.R. Linton | 0920003093 | ||
| Hieracium gratum | Yes | A1 | 135--28--54 | P.D. Sell & C. West | 0920003094 | ||
| Hieracium grovesii | Yes | A1 | 135--28--237 | Pugsley | 0920003096.1 | ||
| Hieracium hanburyi | Yes | A1 | 135--28--230 | Pugsley | 0920003097.1 | ||
| Hieracium hartii | Yes | A1 | 135--28--193 | (F. Hanb.) P.D. Sell & C. West | 0920003098 | ||
| Hieracium hastiforme | Yes | A1 | 135--28--219 | P.D. Sell & C. West | 0920003255 | ||
| Hieracium hebridense | Yes | A1 | 135--28--196 | Pugsley | 0920003099 | ||
| Hieracium hethlandiae | Yes | A1 | 135--28--49 | (F. Hanb.) Pugsley | 0920003101 | ||
| Hieracium hibernicum | Yes | A1 | 135--28--35 | F. Hanb. | 0920003102 | ||
| Hieracium hjeltii | Yes | A1 | 135--28--130 | Norrl. ex T. Saelan, Nyl. & F. Nyl. | 0920003271 | ||
| Hieracium holophyllum | Yes | A1 | 135--28--148 | W.R. Linton | 0920003103 | ||
| Hieracium holosericeum | Yes | A1 | 135--28--248 | Backh. f. | 0920003104 | ||
| Hieracium hyparcticoides | Yes | A1 | 135--28--212 | Pugsley | 0920003105 | ||
| Hieracium hypochaeroides | Yes | A1 | 135--28--168 | Gibson | 0920003106 | ||
| Hieracium insigne | Yes | A1 | 135--28--246 | Backh. f. ex P.D. Sell & D.J. Tennant | 0920007401 | ||
| Hieracium insulare | Yes | A1 | 135--28--228 | (F. Hanb.) F. Hanb. | 0920003107 | ||
| Hieracium integratum | Yes | A1 | 135--28--131 | (Dahlst. ex Stenstr.) Dahlst. | 0920003272 | ||
| Hieracium iricum | Yes | A1 | 135--28--191 | Fr. | 0920003108 | ||
| Hieracium isabellae | Yes | A1 | 135--28--210 | E.S. Marshall | 0920003109 | ||
| Hieracium itunense | Yes | A1 | 135--28--121 | Pugsley | 0920003110 | ||
| Hieracium jovimontis | Yes | A1 | 135--28--162 | (Zahn) Roffey | 0920003111 | ||
| Hieracium kennethii | Yes S1 | A1 | 135--28--ken | P.D. Sell & D.J. Tennant | |||
| Hieracium kentii | Yes S2, S3 | A1 | 135--28--ket | P.D. Sell | |||
| Hieracium laetificum | Yes | A1 | 135--28--204 | P.D. Sell & C. West | 0920003258 | ||
| Hieracium lanatum | Yes | A1 | 135--28--lan | Vill. | |||
| Hieracium langwellense | Yes | A1 | 135--28--194 | F. Hanb. | 0920003114 | ||
| Hieracium larigense | Yes | A1 | 135--28--235 | (Pugsley) P.D. Sell & C. West | 0920004506 | ||
| Hieracium lasiophyllum | Yes | A1 | 135--28--165 | W.D.J. Koch | 0920003115 | ||
| Hieracium latobrigorum | Yes | A1 | 135--28--15 | (Zahn) Roffey | 0920003116 | ||
| Hieracium lepidulum | Yes | A1 | 135--28--65 | Stenstr. | 0920003117 | ||
| Hieracium leptodon | Yes S1 | A1 | 135--28--lep | P.D. Sell & D.J. Tennant | |||
| Hieracium leyanum | Yes | A1 | 135--28--149 | (Zahn) Roffey | 0920003119 | ||
| Hieracium leyi | Yes | A1 | 135--28--161 | F. Hanb. | 0920003118 | ||
| Hieracium linguans | Yes | A1 | 135--28--37 | (Zahn) Roffey | 0920003121 | ||
| Hieracium lingulatum | Yes | A1 | 135--28--229 | Backh. f. ex Hook. & Arn. | 0920003122 | ||
| Hieracium lissolepium | Yes | A1 | 135--28--33 | (Zahn) Roffey | 0920003124 | ||
| Hieracium longilobum | Yes | A1 | 135--28--214 | (Dahlst. ex Zahn) Roffey | 0920003125 | ||
| Hieracium macrocarpum | Yes | A1 | 135--28--233 | Pugsley | 0920003126 | ||
| Hieracium maculatum | Yes | A1 | 135--28--74 | Sm. | 0920003127 | ||
| Hieracium maculoides | Yes | A1 | 135--28--80 | P.D. Sell & C. West | 0920003273 | ||
| Hieracium maculosum | Yes | A1 | 135--28--101 | Dahlst. ex Stenstr. | 0920003128 | ||
| Hieracium magniceps | Yes | A1 | 135--28--190 | P.D. Sell & C. West | 0920003263 | ||
| Hieracium marginatum | Yes | A1 | 135--28--240 | P.D. Sell & C. West | 0920003252 | ||
| Hieracium maritimum | Yes | A1 | 135--28--7 | (F. Hanb.) F. Hanb. | 0920003129 | ||
| Hieracium marshallii | Yes | A1 | 135--28--222 | E.F. Linton | 0920003130 | ||
| Hieracium melanochloricephalum | Yes | A1 | 135--28--208 | Pugsley | 0920003131 | ||
| Hieracium memorabile | Yes | A1 | 135--28--239 | P.D. Sell & C. West | 0920003253 | ||
| Hieracium milesii | Yes S1 | A1 | 135--28--mil | P.D. Sell & C. West | |||
| Hieracium mirandum | Yes | A1 | 135--28--42 | P.D. Sell & C. West | 0920003274 | ||
| Hieracium molybdochroum | Yes | A1 | 135--28--223 | Dahlst. | 0920003132 | ||
| Hieracium mucronellum | Yes | A1 | 135--28--100 | P.D. Sell & C. West | 0920003275 | ||
| Hieracium mundum | Yes S1 | A1 | 135--28--mun | P.D. Sell & C. West | |||
| Hieracium murorum agg. | Aggregate | AK | 135--28--- | N | |||
| Hieracium naviense | Yes | A1 | 135--28--181 | J.N. Mills | 0920003276 | ||
| Hieracium neocoracinum | Yes | A1 | 135--28--93 | Pugsley | 0920003133 | ||
| Hieracium nidense | Yes | A1 | 135--28--27 | (F. Hanb.) Roffey | 0920003134 | ||
| Hieracium nitidum | Yes | A1 | 135--28--163 | Backh. f. | 0920003135 | ||
| Hieracium northroense | Yes | A1 | 135--28--44 | Pugsley | 0920003136 | ||
| Hieracium notabile | Yes | A1 | 135--28--242 | P.D. Sell & C. West | 0920003251 | ||
| Hieracium oblongum | Yes | A1 | 135--28--132 | Jord. | 0920003278 | ||
| Hieracium oistophyllum | Yes | A1 | 135--28--91 | Pugsley | 0920003138 | ||
| Hieracium optimum | Yes S1 | A1 | 135--28--opt | P.D. Sell & C. West | |||
| Hieracium orcadense | Yes | A1 | 135--28--78 | W.R. Linton | 0920003078 | ||
| Hieracium orimeles | Yes | A1 | 135--28--142 | F. Hanb. ex W.R. Linton | 0920003141 | ||
| Hieracium orithales | Yes | A1 | 135--28--90 | E.F. Linton | 0920003123 | ||
| Hieracium ornatilorum | Yes | A1 | 135--28--18 | P.D. Sell & C. West | 0920003279 | ||
| Hieracium oxyodus | Yes | A1 | 135--28--79 | W.R. Linton | 0920003142 | ||
| Hieracium pachyphylloides | Yes | A1 | 135--28--105 | (Zahn) Roffey | 0920003143 | ||
| Hieracium patale | Yes | A1 | 135--28--134 | Norrl. | 0920003280 | ||
| Hieracium pauculidens | Yes | A1 | 135--28--99 | P.D. Sell & C. West | 0920003281 | ||
| Hieracium pellucidum | Yes | A1 | 135--28--129 | Laest. | 0920003145 | ||
| Hieracium pensum | Yes S1 | A1 | 135--28--pen | P.D. Sell & C. West | |||
| Hieracium perscitum | Yes S1 | A1 | 135--28--per | P.D. Sell & C. West | |||
| Hieracium petrocharis | Yes | A1 | 135--28--202 | (E.F. Linton) W.R. Linton | 0920003148 | ||
| Hieracium pictorum | Yes | A1 | 135--28--112 | E.F. Linton | 0920003149 | ||
| Hieracium piligerum | Yes | A1 | 135--28--110 | (Pugsley) P.D. Sell & C. West | 0920003236 | ||
| Hieracium pilosum | Clement | A3 | 135--28--pil | Schleich. ex Froel. | 0920006698 | ||
| Hieracium placerophylloides | Yes | A1 | 135--28--29 | Pugsley | 0920003151 | ||
| Hieracium pollichiae | Yes | A1 | 135--28--58 | Sch. Bip. | 0920003180 | ||
| Hieracium pollinarioides | Yes | A1 | 135--28--111 | Pugsley | 0920003152 | ||
| Hieracium pollinarium | Yes | A1 | 135--28--122 | F. Hanb. | 0920003153 | ||
| Hieracium praethulense | Yes | A1 | 135--28--50 | Pugsley | 0920003156 | ||
| Hieracium prenanthoides | Yes | A1 | 135--28--39 | Vill. | 0920003157 | ||
| Hieracium probum | Yes S1 | A1 | 135--28--pro | P.D. Sell & C. West | |||
| Hieracium prolixum | Yes | A1 | 135--28--120 | Norrl. | 0920003158 | ||
| Hieracium proximum | Yes | A1 | 135--28--144 | F. Hanb. | 0920003159 | ||
| Hieracium pruinale | Yes | A1 | 135--28--126 | (Zahn) P.D. Sell & C. West | 0920003283 | ||
| Hieracium pseudanglicoides | Yes | A1 | 135--28--199 | Raven, P.D. Sell & C. West | 0920003259 | ||
| Hieracium pseudanglicum | Yes | A1 | 135--28--200 | Pugsley | 0920003162 | ||
| Hieracium pseudocurvatum | Yes | A1 | 135--28--231 | (Zahn) Pugsley | 0920003163 | ||
| Hieracium pseudoleyi | Yes | A1 | 135--28--158 | (Zahn) Roffey | 0920003265 | ||
| Hieracium pseudopetiolatum | Yes | A1 | 135--28--245 | (Zahn) Roffey | 0920003164 | ||
| Hieracium pseudosarcophyllum | Yes | A1 | 135--28--107 | Pugsley | 0920003165 | ||
| Hieracium pseudostenstroemii | Yes | A1 | 135--28--108 | Pugsley | 0920003166 | ||
| Hieracium pugsleyi | Yes | A1 | 135--28--47 | P.D. Sell & C. West | 0920003284 | ||
| Hieracium pulchrius | Yes | A1 | 135--28--75 | (Ley) W.R. Linton | 0920003167 | ||
| Hieracium pulmonarioides | Yes | A1 | 135--28--187 | Vill. | 0920003168 | ||
| Hieracium pycnotrichum | Yes | A1 | 135--28--8 | (W.R. Linton) Roffey | 0920003171 | ||
| Hieracium radyrense | Yes | A1 | 135--28--86 | (Pugsley) P.D. Sell & C. West | 0920003172 | ||
| Hieracium rectulum | Yes | A1 | 135--28--76 | Ley | 0920003173 | ||
| Hieracium repandulare | Yes | A1 | 135--28--169 | Druce | 0920003174 | ||
| Hieracium reticulatum | Yes | A1 | 135--28--11 | Lindeb. | 0920003175 | ||
| Hieracium rhomboides | Yes | A1 | 135--28--84 | (Stenstr.) Johanss. | 0920003176 | ||
| Hieracium riddelsdellii | Yes | A1 | 135--28--170 | Pugsley | 0920003177 | ||
| Hieracium rigens | Yes | A1 | 135--28--3 | Jord. | 0920003178 | ||
| Hieracium rivale | Yes | A1 | 135--28--104 | F. Hanb. | 0920003179 | ||
| Hieracium rubiginosum | Yes | A1 | 135--28--63 | F. Hanb. | 0920003181 | ||
| Hieracium sabaudum | Yes | A1 | 135--28--1 | L. | 0920003146 | ||
| Hieracium salticola | Yes | A1 | 135--28--4 | (Sudre) P.D. Sell & C. West | 0920003182 | ||
| Hieracium sanguineum | Yes | A1 | 135--28--106 | (Ley) W.R. Linton | 0920003183 | ||
| Hieracium sarcophylloides | Yes | A1 | 135--28--177 | Dahlst. | 0920003170 | ||
| Hieracium saxorum | Yes | A1 | 135--28--173 | (F. Hanb.) P.D. Sell & C. West | 0920003184 | ||
| Hieracium scabrisetum | Yes | A1 | 135--28--24 | (Zahn) Roffey | 0920003185 | ||
| Hieracium scarpicum | Yes | A1 | 135--28--189 | Pugsley | 0920003186 | ||
| Hieracium schmidtii | Yes | A1 | 135--28--167 | Tausch | 0920003187 | ||
| Hieracium scoticum | Yes | A1 | 135--28--145 | F. Hanb. | 0920003188 | ||
| Hieracium scotostictum | Yes | A1 | 135--28--115 | Hyl. | 0920003189 | ||
| Hieracium scullyi | Yes | A1 | 135--28--26 | W.R. Linton | 0920003190 | ||
| Hieracium sect. Hieracium exotericum agg. | Aggregate | AK | 135--28--- | ||||
| Hieracium senescens | Yes | A1 | 135--28--224 | Backh. f. | 0920003192 | ||
| Hieracium severiceps | Yes | A1 | 135--28--137 | Wiinst. | 0920003285 | ||
| Hieracium shoolbredii | Yes | A1 | 135--28--198 | E.S. Marshall | 0920003193 | ||
| Hieracium silvaticoides | Yes | A1 | 135--28--92 | Pugsley | 0920003194 | ||
| Hieracium sinuans | Yes | A1 | 135--28--225 | F. Hanb. | 0920003169 | ||
| Hieracium snowdoniense | Yes | A1 | 135--28--127 | P.D. Sell & C. West | 0920003195 | ||
| Hieracium solum | Yes | A1 | 135--28--55 | P.D. Sell & C. West | 0920003286 | ||
| Hieracium sommerfeltii | Yes | A1 | 135--28--156 | Lindeb. | 0920003196 | ||
| Hieracium sparsifolium | Yes | A1 | 135--28--34 | Lindeb. | 0920003197 | ||
| Hieracium sparsifrons | Yes | A1 | 135--28--36 | P.D. Sell & C. West | 0920003139 | ||
| Hieracium speluncarum | Yes | A1 | 135--28--186 | Arv.-Touv. | 0920003198 | ||
| Hieracium spenceanum | Yes S1 | A1 | 135--28--spe | W. Scott & R.C. Palmer | |||
| Hieracium stenolepiforme | Yes | A1 | 135--28--183 | (Pugsley) P.D. Sell & C. West | 0920003200 | ||
| Hieracium stenopholidium | Yes | A1 | 135--28--184 | (Dahlst.) Omang | 0920003260 | ||
| Hieracium stenophyes | Yes | A1 | 135--28--82 | W.R. Linton | 0920003201 | ||
| Hieracium stenstroemii | Yes | A1 | 135--28--123 | (Dahlst.) Johanss. | 0920003087 | ||
| Hieracium stewartii | Yes | A1 | 135--28--25 | (F. Hanb.) Roffey | 0920003202 | ||
| Hieracium strictiforme | Yes | A1 | 135--28--12 | (Zahn) Roffey | 0920003204 | ||
| Hieracium subamplifolium | Yes | A1 | 135--28--67 | (Zahn) Roffey | 0920003206 | ||
| Hieracium subbritannicum | Yes | A1 | 135--28--182 | (Ley) P.D. Sell & C. West | 0920003207 | ||
| Hieracium subcrassum | Yes | A1 | 135--28--133 | (Almq. ex Dahlst.) Johanss. | 0920003287 | ||
| Hieracium subcrocatum | Yes | A1 | 135--28--14 | (E.F. Linton) Roffey | 0920003208 | ||
| Hieracium subglobosum | Yes S1 | A1 | 135--28--sub | P.D. Sell & C. West | |||
| Hieracium subgracilentipes | Yes | A1 | 135--28--243 | (Zahn) Roffey | 0920003210 | ||
| Hieracium subhirtum | Yes | A1 | 135--28--94 | (F. Hanb.) Pugsley | 0920003211 | ||
| Hieracium subintegrifolium | Yes | A1 | 135--28--28 | Pugsley | 0920003212 | ||
| Hieracium sublepistoides | Yes | A1 | 135--28--136 | (Zahn) Druce | 0920003213 | ||
| Hieracium subminutidens | Yes | A1 | 135--28--71 | (Zahn) Pugsley | 0920003214 | ||
| Hieracium submutabile | Yes | A1 | 135--28--77 | (Zahn) Pugsley | 0920003216 | ||
| Hieracium subplanifolium | Yes | A1 | 135--28--174 | Pugsley | 0920003217 | ||
| Hieracium subprasinifolium | Yes | A1 | 135--28--119 | Pugsley | 0920003218 | ||
| Hieracium subramosum | Yes | A1 | 135--28--64 | L”nnr. | 0920003219 | ||
| Hieracium subrude | Yes | A1 | 135--28--143 | (Arv.-Touv.) Arv.-Touv. | 0920003220 | ||
| Hieracium substrigosum | Yes | A1 | 135--28--30 | (Zahn) Roffey | 0920003221 | ||
| Hieracium subtenue | Yes | A1 | 135--28--95 | (W.R. Linton) Roffey | 0920003222 | ||
| Hieracium subtruncatum | Yes | A1 | 135--28--45 | Beeby | 0920003223 | ||
| Hieracium subumbellatiforme | Yes | A1 | 135--28--10 | (Zahn) Roffey | 0920003161 | ||
| Hieracium surrejanum | Yes | A1 | 135--28--66 | F. Hanb. | 0920003224 | ||
| Hieracium tavense | Yes | A1 | 135--28--16 | (Ley ex W.R. Linton) Ley | 0920003225 | ||
| Hieracium tenuifrons | Yes | A1 | 135--28--244 | P.D. Sell & C. West | 0920003090.1 | ||
| Hieracium trichocaulon | Yes | A1 | 135--28--21 | (Dahlst.) Johanss. | 0920003227 | ||
| Hieracium triviale | Yes | A1 | 135--28--61 | Norrl. | 0920003288 | ||
| Hieracium uiginskyense | Yes | A1 | 135--28--32 | Pugsley | 0920003230 | ||
| Hieracium uistense | Yes | A1 | 135--28--125 | (Pugsley) P.D. Sell & C. West | 0920003231 | ||
| Hieracium uisticola | Yes | A1 | 135--28--89 | Pugsley | 0920003232 | ||
| Hieracium umbellatum | Yes | A1 | 135--28--6 | L. | 0920003023 | ||
| Hieracium umbellatum subsp. bichlorophyllum | Yes | A1 | 135--28--6--b | (Druce & Zahn) P.D. Sell & C. West | 0920003023.1 | ||
| Hieracium umbellatum subsp. umbellatum | Yes | A1 | 135--28--6--a | 0920003023.2 | |||
| Hieracium vagense | Yes | A1 | 135--28--154 | (F. Hanb.) Ley | 0920003234 | ||
| Hieracium vagum | Yes | A1 | 135--28--5 | Jord. | 0920003235 | ||
| Hieracium variifolium | Yes | A1 | 135--28--98 | P.D. Sell & C. West | 0920003289 | ||
| Hieracium vennicontium | Yes | A1 | 135--28--209 | Pugsley | 0920003237 | ||
| Hieracium villosum | Clement | A3 | 135--28--vil | Jacq. | 0920004513 | ||
| Hieracium vinicaule | Yes | A1 | 135--28--43 | P.D. Sell & C. West | 0920003238 | ||
| Hieracium virgultorum | Yes | A1 | 135--28--2 | Jord. | 0920003239 | ||
| Hieracium vulgatum | Yes | A1 | 135--28--62 | Fr. | 0920003240 | ||
| Hieracium westii | Yes | A1 | 135--28--221 | P.D. Sell | 0920003215 | ||
| Hieracium zetlandicum | Yes | A1 | 135--28--57 | Beeby | 0920003241 | ||
| Hieracium zygophorum | Yes | A1 | 135--28--114 | Hyl. | 0920003290 | ||
| Hierochloe odorata | Holy-grass | Yes | A1 | 153--36--1 | N | (L.) P. Beauv. | 0920000977 |
| Himantoglossum hircinum | Lizard Orchid | Yes | A1 | 162--22--1 | N | (L.) Spreng. | 0920000978 |
| Hippocrepis comosa | Horseshoe Vetch | Page 41 | A1 | 77--12--2 | N | L. | 0920000979 |
| Hippocrepis emerus | Scorpion Senna | Yes | A1 | 77--12--1 | Ne | (L.) Lassen | 0920007402 |
| Hippocrepis multisiliquosa | Clement | A3 | 77--12--mul | L. | 0920006699 | ||
| Hippocrepis unisiliquosa | Clement | A3 | 77--12--uni | L. | 0920005555 | ||
| Hippophae rhamnoides | Sea-buckthorn | Page 41 | A1 | 78--1--1 | N | L. | 0920000980 |
| Hippuris vulgaris | Mare's-tail | Page 41 | A1 | 119--1--1 | N | L. | 0920000981 |
| Hirschfeldia incana | Hoary Mustard | Page 41 | A1 | 62--38--1 | Ne | (L.) Lagr.-Foss. | 0920000982 |
| Hoheria populnea | New Zealand Mallow | Yes S1 | A1 | 53--HOH--pop | Ne | A. Cunn. | 0920003473 |
| Holcus annuus | Clement | A3 | 153--33--ann | Salzm. ex C.A. Mey. | 0920006700 | ||
| Holcus lanatus | Yorkshire-fog | Page 41 | A1 | 153--33--1 | N | L. | 0920000983 |
| Holcus lanatus x mollis = H. x hybridus | Yes | A1 | 153--33--1 x 2 | Wein | 0920002912 | ||
| Holcus mollis | Creeping Soft-grass | Page 41 | A1 | 153--33--2 | N | L. | 0920000984 |
| Holcus setiger | Clement | A3 | 153--33--set | Nees | 0920006701 | ||
| Holodiscus discolor | Oceanspray | Yes | A1 | 75--5--1 | Ne | (Pursh) Maxim. | 0920004316 |
| Holosteum umbellatum | Jagged Chickweed | Yes | A1 | 46--6--1 | Ne | L. | 0920000986 |
| Homeria collina | Cape-tulip | Clement | A3 | 159--HOM--col | (Thunb.) Salisb. | 0920004222 | |
| Homogyne alpina | Purple Colt's-foot | Yes | A1 | 135--72--1 | ?N | (L.) Cass. | 0920000987 |
| Homopholis proluta | Clement | A3 | 153--HOM--pro | (F. Muell) R.D. Webster | 0920006702 | ||
| Honckenya peploides | Sea Sandwort | Page 41 | A1 | 46--3--1 | N | (L.) Ehrh. | 0920000988 |
| Hordelymus europaeus | Wood Barley | Yes | A1 | 153--58--1 | N | (L.) Jess. ex Harz | 0920000989 |
| Hordeum bogdanii | Clement | A3 | 153--59--bog | Wilensky | 0920006703 | ||
| Hordeum brevisubulatum | Clement | A3 | 153--59--bre | (Trin.) Link | 0920006704 | ||
| Hordeum chilense | Clement | A3 | 153--59--chi | Roem. & Schult. | 0920006705 | ||
| Hordeum comosum | Clement | A3 | 153--59--com | J. Presl | 0920006706 | ||
| Hordeum cordobense | Clement | A3 | 153--59--cor | Bothmer, N. Jacobsen & Nicora | 0920006707 | ||
| Hordeum distichon | Two-rowed Barley | Yes | A1 | 153--59--1 | Ca | L. | 0920004368 |
| Hordeum euclaston | Argentine Barley | Stace | A2 | 153--59--euc | Ca | Steud. | 0920003137 |
| Hordeum flexuosum | Clement | A3 | 153--59--fle | Nees ex Steud. | 0920006708 | ||
| Hordeum geniculatum | Mediterranean Barley | Stace | A2 | 153--59--gen | Ca | All. | 0920009181 |
| Hordeum halophilum | Clement | A3 | 153--59--hal | Griseb. | 0920006709 | ||
| Hordeum jubatum | Foxtail Barley | Yes | A1 | 153--59--3 | Ne | L. | 0920000990 |
| Hordeum lechleri | Clement | A3 | 153--59--lec | (Steud.) Schenk | 0920006710 | ||
| Hordeum marinum | Sea Barley | Yes | A1 | 153--59--5 | N | Huds. | 0920000991 |
| Hordeum murinum | Wall Barley | Page 41 | A1 | 153--59--2 | Ar | L. | 0920000992 |
| Hordeum murinum subsp. glaucum | Stace | A2 | 153--59--2--c | Ca | (Steudel) Tzvelev | 0920000992.4 | |
| Hordeum murinum subsp. leporinum | Yes | A1 | 153--59--2--b | Ne | (Link) Arcang. | 0920000992.1 | |
| Hordeum murinum subsp. murinum | Yes | A1 | 153--59--2--a | 0920000992.3 | |||
| Hordeum muticum | Clement | A3 | 153--59--mut | J. Presl | 0920006711 | ||
| Hordeum parodii | Clement | A3 | 153--59--par | Covas | 0920006712 | ||
| Hordeum procerum | Clement | A3 | 153--59--pro | Nevski | 0920006713 | ||
| Hordeum pubiflorum | Antarctic Barley | Stace | A2 | 153--59--pub | Ca | Hook. f. | 0920003140 |
| Hordeum pusillum | Little Barley | Stace | A2 | 153--59--pus | Ca | Nutt. | 0920003120 |
| Hordeum secalinum | Meadow Barley | Page 41 | A1 | 153--59--4 | N | Schreb. | 0920000993 |
| Hordeum stenostachys | Clement | A3 | 153--59--ste | Godr. | 0920006714 | ||
| Hordeum violaceum | Clement | A3 | 153--59--vio | Boiss. & Hohen. | 0920006715 | ||
| Hordeum vulgare | Six-rowed Barley | Stace | A2 | 153--59--vul | Ca | L. | 0920008282 |
| Hornungia petraea | Hutchinsia | Yes | A1 | 62--26--1 | N | (L.) Rchb. | 0920000994 |
| Hosta elata | Clement | A3 | 158--HOS--ela | Hyl. | 0920006716 | ||
| Hosta fortunei | Clement | A3 | 158--HOS--for | (Baker) L.H. Bailey | 0920006717 | ||
| Hosta lancifolia | Narrow-leaved Plantain-lily | Clement | A3 | 158--HOS--lan | (Thunb.) Engl. | 0920006718 | |
| Hosta nakaiana | Clement | A3 | 158--HOS--nak | (Maek.) Maek. | 0920006719 | ||
| Hosta sieboldiana | Clement | A3 | 158--HOS--sie | (Hook.) Engl. | 0920006720 | ||
| Hosta ventricosa | Blue Plantain-lily | Clement | A3 | 158--HOS--ven | (Salisb.) Stearn | 0920006721 | |
| Hottonia palustris | Water-violet | Page 41 | A1 | 69--2--1 | N | L. | 0920000995 |
| Hugueninia tanacetifolia | Tansey-leaved Rocket | Clement | A3 | 62--HUG--tan | (L.) Rchb. | 0920006722 | |
| Humulus japonicus | Japanese Hop | Clement | A3 | 34--2--jap | Siebold & Zucc. | 0920006723 | |
| Humulus lupulus | Hop | Page 43 | A1 | 34--2--1 | N | L. | 0920000996 |
| Huperzia selago | Fir Clubmoss | Page 43, S1, S3 | A1 | 1--1--1 | N | (L.) Bernh. ex Schrank & Mart. | 0910001217 |
| Hyacinthoides hispanica | Spanish Bluebell | Yes | A1 | 158--20--3 | Ne | (Mill.) Rothm. | 0920000686 |
| Hyacinthoides italica | Italian Bluebell | Yes | A1 | 158--20--1 | Ne | (L.) Rothm. | 0920007403 |
| Hyacinthoides non-scripta | Bluebell | Page 43 | A1 | 158--20--2 | N | (L.) Chouard ex Rothm. | 0920000687 |
| Hyacinthoides non-scripta x hispanica = H. x massartiana | Page 43 S2 | A1 | 158--20--2 x 3 | Ne | Geerinck | 0920002617 | |
| Hyacinthus orientalis | Hyacinth | Yes | A1 | 158--21--1 | Ne | L. | 0920007404 |
| Hyalosperma glutinosa | Golden Sunray | Clement | A3 | 135--HYA--glu | Steetz | 0920006724 | |
| Hydrangea anomala | Japanese Climbing-hydrangea | Clement | A3 | 71--HYD--ano | D. Don | 0920008090 | |
| Hydrangea macrophylla | Hydrangea | Yes S1 | A1 | 71--HYD--mac | Ne | Ser. | 0920003474 |
| Hydrilla verticillata | Hydrilla | Yes | A1 | 138--5--1 | N | (L. f.) Royle | 0920002291 |
| Hydrocharis morsus-ranae | Frogbit | Page 43 | A1 | 138--1--1 | N | L. | 0920000998 |
| Hydrocleys nymphoides | Water-poppy | Clement | A3 | 136A--HYD--nym | (Willd.) Buchenau | 0920006725 | |
| Hydrocotyle moschata | Hairy Pennywort | Yes | A1 | 107--1--2 | Ne | G. Forst. | 0920004471 |
| Hydrocotyle novae-zeelandiae | New Zealand Pennywort | Yes | A1 | 107--1--3 | Ne | DC. | 0920007405 |
| Hydrocotyle ranunculoides | Floating Pennywort | Page 43 | A1 | 107--1--ran | Ne | L. f. | 0920008517 |
| Hydrocotyle sibthorpioides | Clement | A3 | 107--1--sib | Lam. | 0920006726 | ||
| Hydrocotyle vulgaris | Marsh Pennywort | Page 43 | A1 | 107--1--1 | N | L. | 0920000999 |
| Hymenocarpus circinnatus | Disk Trefoil | Clement | A3 | 77--HYM--cir | (L.) Savi | 0920005556 | |
| Hymenophyllum tunbrigense | Tunbridge Filmy-fern | Yes | A1 | 10--1--1 | N | (L.) Sm. | 0910001000 |
| Hymenophyllum wilsonii | Wilson's Filmy-fern | Page 43 | A1 | 10--1--2 | N | Hook. | 0910001001 |
| Hyoscyamus albus | White Henbane | Clement | A3 | 110--4--alb | L. | 0920006727 | |
| Hyoscyamus aureus | Golden Henbane | Clement | A3 | 110--4--aur | L. | 0920006728 | |
| Hyoscyamus muticus | Clement | A3 | 110--4--mut | L. | 0920006729 | ||
| Hyoscyamus niger | Henbane | Page 43 | A1 | 110--4--1 | Ar | L. | 0920001002 |
| Hyoscyamus reticulatus | Clement | A3 | 110--4--ret | L. | 0920006730 | ||
| Hyparrhenia hirta | Clement | A3 | 153--HYP--hir | (L.) Stapf | 0920006731 | ||
| Hypecoum imberbe | Clement | A3 | 30--HYP--imb | Sibth. & Sm. | 0920006732 | ||
| Hypecoum pendulum | Clement | A3 | 30--HYP--pen | L. | 0920005609 | ||
| Hypecoum procumbens | Clement | A3 | 30--HYP--pro | L. | 0920006733 | ||
| Hypericum aegypticum | Clement | A3 | 51--1--aeg | L. | 0920006734 | ||
| Hypericum androsaemum | Tutsan | Page 43 | A1 | 51--1--3 | N | L. | 0920001003 |
| Hypericum androsaemum x hircinum = H. x inodorum | Tall Tutsan | Yes | A1 | 51--1--3 x 4 | Ne | Mill. | 0920001007 |
| Hypericum calycinum | Rose-of-Sharon | Page 43 | A1 | 51--1--1 | Ne | L. | 0920001004 |
| Hypericum canadense | Irish St John's-wort | Yes | A1 | 51--1--17 | Ne | L. | 0920002265 |
| Hypericum elodes | Marsh St John's-wort | Page 43 | A1 | 51--1--16 | N | L. | 0920001008 |
| Hypericum forrestii | Forrest's Tutsan | Yes S1 | A1 | 51--1--for | Ne | (Chitt.) N. Robson | 0920008093 |
| Hypericum hircinum | Stinking Tutsan | Yes | A1 | 51--1--4 | Ne | L. | 0920001009 |
| Hypericum hircinum subsp. majus | Yes | A1 | 51--1--4--a | (Aiton) N. Robson | 0920001009 | ||
| Hypericum hirsutum | Hairy St John's-wort | Page 43 | A1 | 51--1--14 | N | L. | 0920001010 |
| Hypericum humifusum | Trailing St John's-wort | Page 43 | A1 | 51--1--10 | N | L. | 0920001011 |
| Hypericum humifusum x linariifolium | Yes | A1 | 51--1--10 x 11 | 0920007406 | |||
| Hypericum linariifolium | Toadflax-leaved St John's-wort | Yes | A1 | 51--1--11 | N | Vahl | 0920001012 |
| Hypericum maculatum | Imperforate St John's-wort | Page 43 | A1 | 51--1--7 | N | Crantz | 0920001006 |
| Hypericum maculatum subsp. maculatum | Yes | A1 | 51--1--7--a | N | 0920001006.1 | ||
| Hypericum maculatum subsp. obtusiusculum | Yes | A1 | 51--1--7--b | N | (Tourlet) Hayek | 0920001006.2 | |
| Hypericum montanum | Pale St John's-wort | Page 43 | A1 | 51--1--15 | N | L. | 0920001013 |
| Hypericum nummularium | Round-leaved St John's-wort | Yes | A1 | 51--1--13 | Ne | L. | 0920007407 |
| Hypericum olympicum | Clement | A3 | 51--1--oly | L. | 0920004039 | ||
| Hypericum perforatum | Perforate St John's-wort | Page 43 | A1 | 51--1--6 | N | L. | 0920001014 |
| Hypericum perforatum x maculatum = H. x desetangsii | Des Etangs' St John's-wort | Yes | A1 | 51--1--6 x 7 | N | Lamotte | 0920001005 |
| Hypericum pseudohenryi | Irish Tutsan | Yes | A1 | 51--1--2 | Ne | N. Robson | 0920007408 |
| Hypericum pulchrum | Slender St John's-wort | Page 43 | A1 | 51--1--12 | N | L. | 0920001015 |
| Hypericum richeri | Alpine St John's-wort | Clement | A3 | 51--1--ric | Vill. | 0920006735 | |
| Hypericum tetrapterum | Square-stalked St John's-wort | Page 43 | A1 | 51--1--9 | N | Fr. | 0920001016 |
| Hypericum undulatum | Wavy St John's-wort | Yes | A1 | 51--1--8 | N | Schousb. ex Willd. | 0920001017 |
| Hypericum xylosteifolium | Turkish Tutsan | Yes | A1 | 51--1--5 | Ne | (Spach) N. Robson | 0920007409 |
| Hypochaeris achyrophorus | Clement | A3 | 135--15--ach | L. | 0920006736 | ||
| Hypochaeris glabra | Smooth Cat's-ear | Yes | A1 | 135--15--2 | N | L. | 0920001018 |
| Hypochaeris maculata | Spotted Cat's-ear | Yes | A1 | 135--15--3 | N | L. | 0920001019 |
| Hypochaeris radicata | Cat's-ear | Page 43 | A1 | 135--15--1 | N | L. | 0920001020 |
| Hypochaeris radicata x glabra = H. x intermedia | Yes | A1 | 135--15--1 x 2 | Richt. | 0920002836 | ||
| Hyssopus officinalis | Hyssop | Yes | A1 | 118--19--1 | Ne | L. | 0920001021 |
| Hystrix patula | Bottle-brush-grass | Clement | A3 | 153--HYS--pat | Moench | 0920006737 |