| Accepted Latin Names | Common Name | In Kent? | Type | Kent ref. | Status | Authority | Record No. |
|---|---|---|---|---|---|---|---|
| Baccharis halimifolia | Tree Groundsel | Yes | A1 | 135--46--1 | Ne | L. | 0920007181 |
| Bahia dissecta | Clement | A3 | 135--BAH--dis | (A. Gray) Britton | 0920005944 | ||
| Bahia neomexicana | New Mexico Bahia | Clement | A3 | 135--BAH--neo | (A. Gray) A. Gray | 0920005945 | |
| Baldellia ranunculoides | Lesser Water-plantain | Page 9 | A1 | 137--2--1 | N | (L.) Parl. | 0920000224 |
| Ballota acetabulosa | False Dittany | Yes S3 | A1 | 118--2--ace | Ne | (L.) Benth. | |
| Ballota hispanica | Clement | A3 | 118--2--his | (L.) Benth. | 0920005946 | ||
| Ballota nigra | Black Horehound | Page 9 | A1 | 118--2--1 | Ar | L. | 0920000225 |
| Ballota nigra subsp. meridionalis | Yes S1 | A1 | 118--2--1--a | (B‚g.) B‚g. | 0920000225 | ||
| Ballota nigra subsp. nigra | Clement | A3 | 118--2--1--b | 0920000225.2 | |||
| Ballota pseudodictamnus | Clement | A3 | 118--2--pse | (L.) Benth. | 0920005948 | ||
| Baptisia tinctoria | Wild-indigo | Clement | A3 | 77--BAP--tin | (L.) R. Br. | 0920005949 | |
| Barbarea intermedia | Medium-flowered Winter-cress | Yes | A1 | 62--11--3 | Ne | Boreau | 0920000226 |
| Barbarea stricta | Small-flowered Winter-cress | Yes | A1 | 62--11--2 | Ne | Andrz. | 0920000227 |
| Barbarea verna | American Winter-cress | Yes | A1 | 62--11--4 | Ne | (Mill.) Asch. | 0920000228 |
| Barbarea vulgaris | Winter-cress | Page 9 | A1 | 62--11--1 | N | W.T. Aiton | 0920000229 |
| Bartsia alpina | Alpine Bartsia | Yes | A1 | 124--22--1 | N | L. | 0920000230 |
| Bassia hyssopifolia | Clement | A3 | 43--2--hys | (Pall.) Kuntze | 0920005950 | ||
| Bassia muricata | Clement | A3 | 43--2--mur | (L.) Asch. | 0920005951 | ||
| Bassia prostrata | Clement | A3 | 43--2--pro | (L.) A.J. Scott | 0920005952 | ||
| Bassia scoparia | Summer-cypress | Yes | A1 | 43--2--1 | Ne | (L.) Voss | 0920007182 |
| Beckmannia eruciformis | European Slough-grass | Clement | A3 | 153--48--eru | (L.) Host | 0920005953 | |
| Beckmannia syzigachne | American Slough-grass | Yes | A1 | 153--48--1 | Ne | (Steud.) Fernald | 0920007183 |
| Begonia cucullata x schmidtiana = B. x semperflorens | Wax Begonia | Clement | A3 | 60A--BEG--cuc x sch | hort., nom. nud. | 0920005956 | |
| Begonia grandis | Hardy Begonia | Clement | A3 | 60A--BEG--gra | Dryand. | 0920005954 | |
| Begonia rex | Painted-leaf Begonia | Clement | A3 | 60A--BEG--rex | Putz. | 0920005955 | |
| Bellardia trixago | Trixago Bartsia | Clement | A3 | 124--BEL--tri | (L.) All. | 0920005957 | |
| Bellevalia romana | Roman Squill | Clement | A3 | 158--BEL--rom | (L.) Rchb. | 0920005958 | |
| Bellis annua | Clement | A3 | 135--47--ann | L. | 0920005959 | ||
| Bellis perennis | Daisy | Page 9 | A1 | 135--47--1 | N | L. | 0920000231 |
| Bellium bellidioides | False Daisy | Clement | A3 | 135--BEL--bel | L. | 0920005960 | |
| Berberis aggregata | Clustered Barberry | Yes | A1 | 29--1--5 | Ne | C.K. Schneid. | 0920007184 |
| Berberis buxifolia | Box-leaved Barberry | Yes | A1 | 29--1--8 | Ne | Lam. | 0920002439 |
| Berberis darwinii | Darwin's Barberry | Yes | A1 | 29--1--9 | Ne | Hook. | 0920002440 |
| Berberis darwinii x empetrifolia = B. x stenophylla | Hedge Barberry | Yes | A1 | 29--1--9 x emp | Ne | Lindl. | 0920007189 |
| Berberis gagnepainii | Gagnepain's Barberry | Yes | A1 | 29--1--6 | Ne | C.K. Schneid. | 0920007185 |
| Berberis gagnepainii x candidula = B. x hybrido-gagnepainii | Clement | A3 | 29--1--6 x can | C.K. Schneid. | 0920005965 | ||
| Berberis glaucocarpa | Great Barberry | Yes | A1 | 29--1--3 | Ne | Stapf | 0920002441 |
| Berberis hookeri | Hooker's Barberry | Clement | A3 | 29--1--hoo | Lem. | 0920005961 | |
| Berberis julianae | Chinese Barberry | Yes | A1 | 29--1--7 | Ne | C.K. Schneid. | 0920007186 |
| Berberis manipurana | Manipur Barberry | Clement | A3 | 29--1--man | Ahrendt | 0920005962 | |
| Berberis pruinosa | Clement | A3 | 29--1--pru | Franch. | 0920005963 | ||
| Berberis thunbergii | Thunberg's Barberry | Yes | A1 | 29--1--2 | Ne | DC. | 0920007187 |
| Berberis verruculosa | Clement | A3 | 29--1--ver | Hemsl. & E.H. Wilson | 0920005964 | ||
| Berberis vulgaris | Barberry | Page 9 | A1 | 29--1--1 | ?N | L. | 0920000232 |
| Berberis vulgaris x thunbergii = B. x ottawensis | Clement | A3 | 29--1--1 x 2 | C.K. Schneid. | 0920005966 | ||
| Berberis wilsoniae | Mrs Wilson's Barberry | Yes | A1 | 29--1--4 | Ne | Hemsl. | 0920007188 |
| Bergenia ciliata | Hairy Bergenia | Clement | A3 | 74--3--cil | (Haw.) Sternb. | 0920005967 | |
| Bergenia cordifolia | Heart-leaved Bergenia | Clement | A3 | 74--3--cor | (Haw.) Sternb. | 0920007968 | |
| Bergenia crassifolia | Elephant-ears | Yes | A1 | 74--3--1 | Ne | (L.) Fritsch | 0920007190 |
| Bergenia crassifolia x ciliata = B. x schmidtii | Clement | A3 | 74--3--1 x cil | (Regel) Silva Tar. | 0920004137 | ||
| Bergenia purpurascens | Clement | A3 | 74--3--pur | (Hook. f. & Thomson) Engl. | 0920005968 | ||
| Berkheya heterophylla | Clement | A3 | 135--BER--het | (Thunb.) O. Hoffm. | 0920005969 | ||
| Berkheya pinnatifida | Clement | A3 | 135--BER--pin | (Thunb.) Thell. | 0920005970 | ||
| Berkheya rigida | African Thistle | Clement | A3 | 135--BER--rig | (Thunb.) Ewart, J.W. White & Rees | 0920005971 | |
| Berteroa incana | Hoary Alison | Yes | A1 | 62--19--1 | Ne | (L.) DC. | 0920000233 |
| Berula erecta | Lesser Water-parsnip | Page 9 | A1 | 107--16--1 | N | (Huds.) Coville | 0920000234 |
| Beta trigyna | Caucasian Beet | Yes | A1 | 43--4--2 | Ne | Waldst. & Kit. | 0920000236 |
| Beta vulgaris | Beet | Page 9 | A1 | 43--4--1 | L. | 0920000235 | |
| Beta vulgaris subsp. cicla | Foliage Beet | Yes | A1 | 43--4--1--b | Ne | (L.) Arcang. | 0920000235.3 |
| Beta vulgaris subsp. maritima | Sea Beet | Yes | A1 | 43--4--1--a | N | (L.) Arcang. | 0920000235.1 |
| Beta vulgaris subsp. vulgaris | Root Beet | Yes | A1 | 43--4--1--c | Ne | 0920000235.2 | |
| Betula nana | Dwarf Birch | Yes | A1 | 40--1--3 | N | L. | 0920000238 |
| Betula papyrifera | Paper Birch | Clement | A3 | 40--1--pap | Marshall | 0920007970 | |
| Betula pendula | Silver Birch | Page 9 | A1 | 40--1--1 | N | Roth | 0920000239 |
| Betula pendula x pubescens = B. x aurata | Yes | A1 | 40--1--1 x 2 | N | Borkh. | 0920002301 | |
| Betula pubescens | Downy Birch | Page 9 | A1 | 40--1--2 | N | Ehrh. | 0920000240 |
| Betula pubescens subsp. pubescens | Yes | A1 | 40--1--2--a | 0920000240.2 | |||
| Betula pubescens subsp. tortuosa | Yes | A1 | 40--1--2--b | (Ledeb.) Nyman | 0920000240.1 | ||
| Betula pubescens x nana = B. x intermedia | Yes | A1 | 40--1--2 x 3 | Thomas ex Gaudin | 0920002798 | ||
| Bidens aristosa | Western Tickseed | Clement | A3 | 135--81--ari | (Michx.) Britton | 0920005972 | |
| Bidens bipinnata | Spanish-needles | Stace | A2 | 135--81--bip | Ca | L. | 0920007971 |
| Bidens biternata | Clement | A3 | 135--81--bit | (Lour.) Merr. & Sherff | 0920005973 | ||
| Bidens camporum | Clement | A3 | 135--81--cam | (Hutch.) Mesfin | 0920005974 | ||
| Bidens cernua | Nodding Bur-marigold | Page 11 | A1 | 135--81--1 | N | L. | 0920000241 |
| Bidens connata | London Bur-marigold | Yes | A1 | 135--81--3 | Ne | Muhl. ex Willd. | 0920007191 |
| Bidens ferulifolia | Fern-leaved Beggarticks | Clement | A3 | 135--81--fer | (Jacq.) DC. | 0920005975 | |
| Bidens frondosa | Beggarticks | Yes | A1 | 135--81--4 | Ne | L. | 0920002652 |
| Bidens laevis | Larger Bur-marigold | Clement | A3 | 135--81--lae | (L.) Britton, Sterns & Poggenb. | 0920005976 | |
| Bidens pilosa | Black-jack | Stace | A2 | 135--81--pil | Ca | L. | 0920007972 |
| Bidens subalternans | Clement | A3 | 135--81--sub | DC. | 0920005977 | ||
| Bidens tenuisecta | Clement | A3 | 135--81--ten | A. Gray | 0920005978 | ||
| Bidens tripartita | Trifid Bur-marigold | Page 11 | A1 | 135--81--2 | N | L. | 0920000242 |
| Bidens vulgata | Tall Beggarticks | Clement | A3 | 135--81--vul | Greene | 0920007973 | |
| Bifora radians | Clement | A3 | 107--BIF--rad | M. Bieb. | 0920005979 | ||
| Bifora testiculata | Clement | A3 | 107--BIF--tes | (L.) Roth | 0920005980 | ||
| Biscutella auriculata | Clement | A3 | 62--BIS--aur | L. | 0920005981 | ||
| Biscutella cichoriifolia | Chicory-leaved Buckler-mustard | Clement | A3 | 62--BIS--cic | Loisel. | 0920005982 | |
| Biscutella laevigata | Buckler-mustard | Clement | A3 | 62--BIS--lae | L. | 0920005983 | |
| Biserrula pelecinus | Clement | A3 | 77--BIS--pel | L. | 0920005984 | ||
| Bivonaea lutea | Clement | A3 | 62--BIV--lut | (Biv.) DC. | 0920005985 | ||
| Blackstonia perfoliata | Yellow-wort | Page 11 | A1 | 108--4--1 | N | (L.) Huds. | 0920000243 |
| Blechnum cordatum | Chilean Hard-fern | Yes | A1 | 18--1--2 | Ne | (Desv.) Hieron. | 0910002500 |
| Blechnum penna-marina | Antarctic Hard-fern | Clement | A3 | 18--1--pen | (Poir.) Kuhn | 0910002501 | |
| Blechnum spicant | Hard-fern | Page 11 | A1 | 18--1--1 | N | (L.) Roth | 0910000244 |
| Bletilla striata | Hyacinth Orchid | Clement | A3 | 162--BLE--str | (Thunb.) Rchb. f. | 0920005986 | |
| Blumenbachia hieronymii | Clement | A3 | 60B--BLU--hie | Urb. | 0920005987 | ||
| Blumenbachia insignis | Clement | A3 | 60B--BLU--ins | Schrad. | 0920005988 | ||
| Blysmus compressus | Flat-sedge | Page 11 | A1 | 152--10--1 | N | (L.) Panz. ex Link | 0920000245 |
| Blysmus rufus | Saltmarsh Flat-sedge | Page 11 | A1 | 152--10--2 | N | (Huds.) Link | 0920000246 |
| Boissiera squarrosa | Clement | A3 | 153--BOI--squ | (Banks & Sol.) Nevski | |||
| Bolboschoenus maritimus | Sea Club-rush | Page 11 | A1 | 152--4--1 | N | (L.) Palla | 0920001860 |
| Boltonia asteroides | False Chamomile | Clement | A3 | 135--BOL--ast | (L.) L'H‚r. | 0920005989 | |
| Bombycilaena erecta | Micropus | Clement | A3 | 135--BOM--ere | (L.) Smoljan. | 0920005990 | |
| Borago officinalis | Borage | Yes | A1 | 116--9--1 | Ne | L. | 0920000247 |
| Borago pygmaea | Slender Borage | Yes | A1 | 116--9--2 | Ne | (DC.) Chater & Greuter | 0920007192 |
| Boreava orientalis | Clement | A3 | 62--BOR--ori | Jaub. & Spach | 0920005991 | ||
| Borreria verticillata | Clement | A3 | 129--BOR--ver | (L.) G. Mey. | 0920005992 | ||
| Bothriochloa decipiens | Clement | A3 | 153--BOT--dec | (Hack.) C.E. Hubb. | 0920005993 | ||
| Bothriochloa insculpta | Clement | A3 | 153--BOT--ins | (Hochst. ex A. Rich.) A. Camus | 0920005994 | ||
| Bothriochloa ischaemum | Clement | A3 | 153--BOT--isc | (L.) Keng | 0920005995 | ||
| Bothriochloa macra | Clement | A3 | 153--BOT--mac | (Steud.) S.T. Blake | 0920005996 | ||
| Botrychium lunaria | Moonwort | Page 11 | A1 | 5--2--1 | N | (L.) Sw. | 0910000248 |
| Bouteloua curtipendula | Side-oats Grama | Clement | A3 | 153--BOU--cur | (Michx.) Torr. | 0920005997 | |
| Bowlesia incana | Clement | A3 | 107--BOW--inc | Ruiz & Pav. | 0920005998 | ||
| Brachiaria deflexa | Clement | A3 | 153--BRA--def | (Schumach.) C.E. Hubb. ex Robyns | 0920005999 | ||
| Brachiaria eruciformis | Clement | A3 | 153--BRA--eru | (Sm.) Griseb. | 0920006000 | ||
| Brachiaria gilesii | Clement | A3 | 153--BRA--gil | (Benth.) Chase | 0920006001 | ||
| Brachiaria marlothii | Clement | A3 | 153--BRA--mar | (Hack.) Stent | 0920006002 | ||
| Brachiaria platyphylla | Broad-leaved Signal-grass | Stace | A2 | 153--BRA--pla | Ca | (Griseb.) Nash | 0920003282 |
| Brachyglottis compacta x laxifolia = B. 'Sunshine' | Shrub Ragwort | Yes | A1 | 135--66--- | C. Jeffrey | 0920007193 | |
| Brachyglottis monroi | Monro's Ragwort | Yes | A1 | 135--66--1 | Ne | (Hook. f.) B. Nord. | 0920007194 |
| Brachyglottis repanda | Hedge Ragwort | Yes | A1 | 135--66--2 | Ne | J.R. Forst. & G. Forst. | 0920007195 |
| Brachypodium distachyon | Stiff Brome | Stace | A2 | 153--54--dis | Ca | (L.) P. Beauv. | 0920003100 |
| Brachypodium pinnatum | Heath False-brome | Page 11 | A1 | 153--54--1 | N | (L.) P. Beauv. | 0920000249 |
| Brachypodium pinnatum agg. | Aggregate | AK | 153--54--- | ||||
| Brachypodium retusum | Clement | A3 | 153--54--ret | (Pers.) P. Beauv. | 0920006003 | ||
| Brachypodium rupestre | Tor-grass | Yes S2 | A1 | 153--54--rup | (Host) Roem. & Schult. | ||
| Brachypodium sylvaticum | False-brome | Page 11 | A1 | 153--54--2 | N | (Huds.) P. Beauv. | 0920000250 |
| Brachyscome ciliaris | Variable Daisy | Clement | A3 | 135--BRA--cil | (Labill.) Less. | 0920006004 | |
| Brachyscome graminea | Clement | A3 | 135--BRA--gra | (Labill.) F. Muell. | 0920006005 | ||
| Brachyscome iberidifolia | Swan River Daisy | Clement | A3 | 135--BRA--ibe | Benth. | 0920006006 | |
| Brachyscome perpusilla | Tiny Daisy | Clement | A3 | 135--BRA--per | (Steetz) J.M. Black | 0920006007 | |
| Brassica barrelieri | Clement | A3 | 62--34--bar | (L.) Janka | 0920006008 | ||
| Brassica carinata | Ethiopian Rape | Stace | A2 | 62--34--car | Ca | A. Braun | 0920002563 |
| Brassica elongata | Long-stalked Rape | Stace | A2 | 62--34--elo | Ca | Ehrh. | 0920002564 |
| Brassica fruticulosa | Twiggy Turnip | Clement | A3 | 62--34--fru | Cirillo | 0920007841 | |
| Brassica juncea | Chinese Mustard | Yes | A1 | 62--34--4 | Ca | (L.) Czern. | 0920002565 |
| Brassica napus | Rape | Page 11 | A1 | 62--34--2 | Ne | L. | 0920000251 |
| Brassica napus subsp. oleifera | Oil-seed Rape | Yes | A1 | 62--34--2--a | (DC.) Metzg. | 0920000251.1 | |
| Brassica napus subsp. rapifera | Swede | Yes | A1 | 62--34--2--b | Metzg. | 0920000251.2 | |
| Brassica napus x rapa = B. x harmsiana | Yes | A1 | 62--34--2 x 3 | O.E. Schulz | 0920006960 | ||
| Brassica nigra | Black Mustard | Page 11 | A1 | 62--34--5 | ?N | (L.) W.D.J. Koch | 0920000252 |
| Brassica oleracea | Wild Cabbage | Page 11 | A1 | 62--34--1 | ?N | L. | 0920000253 |
| Brassica rapa | Turnip | Yes | A1 | 62--34--3 | Ar | L. | 0920000254 |
| Brassica rapa subsp. campestris | Wild Turnip | Yes | A1 | 62--34--3--b | (L.) A.R. Clapham | 0920000254.2 | |
| Brassica rapa subsp. oleifera | Turnip-rape | Yes | A1 | 62--34--3--c | (DC.) Metzg. | 0920000254.3 | |
| Brassica rapa subsp. rapa | Turnip | Yes | A1 | 62--34--3--a | 0920000254.1 | ||
| Brassica repanda | Clement | A3 | 62--34--rep | (Willd.) DC. | 0920006009 | ||
| Brassica tournefortii | Pale Cabbage | Stace | A2 | 62--34--tou | Ca | Gouan | 0920002566 |
| Briquetia spicata | Clement | A3 | 53--BRI--spi | (Kunth) Fryxell | 0920006010 | ||
| Briza humilis | Clement | A3 | 153--17--hum | M. Bieb. | 0920006011 | ||
| Briza maxima | Greater Quaking-grass | Yes | A1 | 153--17--3 | Ne | L. | 0920000255 |
| Briza media | Quaking-grass | Page 11 | A1 | 153--17--1 | N | L. | 0920000256 |
| Briza minor | Lesser Quaking-grass | Yes | A1 | 153--17--2 | Ar | L. | 0920000257 |
| Bromopsis benekenii | Lesser Hairy-brome | Yes | A1 | 153--51--2 | N | (Lange) Holub | 0920000259 |
| Bromopsis ciliata | Clement | A3 | 153--51--cil | (L.) Holub | 0920006012 | ||
| Bromopsis erecta | Upright Brome | Page 11 | A1 | 153--51--3 | N | (Huds.) Fourr. | 0920000263 |
| Bromopsis inermis | Hungarian Brome | Yes | A1 | 153--51--4 | Ne | (Leyss.) Holub | 0920000265 |
| Bromopsis inermis subsp. inermis | Yes | A1 | 153--51--4--a | 0920000265.1 | |||
| Bromopsis inermis subsp. pumpelliana | Yes | A1 | 153--51--4--b | Ne | (Scribn.) W.A. Weber | 0920000265.2 | |
| Bromopsis ramosa | Hairy-brome | Page 11 | A1 | 153--51--1 | N | (Huds.) Holub | 0920000272 |
| Bromus alopecuros | Clement | A3 | 153--50--alo | Poir. | 0920006013 | ||
| Bromus arduennensis | Clement | A3 | 153--50--ard | Dumort. | 0920004201 | ||
| Bromus arvensis | Field Brome | Yes | A1 | 153--50--1 | Ne | L. | 0920000258 |
| Bromus brachystachys | Clement | A3 | 153--50--bra | Hornung | 0920006014 | ||
| Bromus briziformis | Clement | A3 | 153--50--bri | Fisch. & C.A. Mey. | 0920005671 | ||
| Bromus commutatus | Meadow Brome | Yes | A1 | 153--50--2 | N | Schrad. | 0920000262 |
| Bromus danthoniae | Clement | A3 | 153--50--dan | Trin. | 0920006015 | ||
| Bromus grossus | Clement | A3 | 153--50--gro | Desf. ex DC. | 0920006016 | ||
| Bromus hordeaceus | Page 11 | A1 | 153--50--4 | N | L. | 0920000269 | |
| Bromus hordeaceus subsp. ferronii | Least Soft-brome | Yes | A1 | 153--50--4--b | N | (Mabille) P.M. Sm. | 0920000264 |
| Bromus hordeaceus subsp. hordeaceus | Common Soft-brome | Yes | A1 | 153--50--4--a | 0920000270 | ||
| Bromus hordeaceus subsp. longipedicellatus | Yes S3 | A1 | 153--50--4--d | Spalton | |||
| Bromus hordeaceus subsp. molliformis | Divergent Soft-brome | Stace | A2 | 153--50--4--e | Ca | (J. Lloyd ex Godr.) Maire & Weiller | |
| Bromus hordeaceus subsp. thominei | Sand Soft-brome | Yes | A1 | 153--50--4--c | N | (Hardouin) Braun-Blanq. | 0920000275 |
| Bromus hordeaceus x lepidus = B. x pseudothominei | Lesser Soft-brome | Yes | A1 | 153--50--4 x 5 | N | P.M. Sm. | 0920002383 |
| Bromus intermedius | Clement | A3 | 153--50--int | Guss. | 0920006017 | ||
| Bromus interruptus | Interrupted Brome | Yes | A1 | 153--50--6 | Ne | (Hack.) Druce | 0920000266 |
| Bromus japonicus | Thunberg's Brome | Stace | A2 | 153--50--jap | Ca | Thunb. | 0920000267 |
| Bromus lanceolatus | Large-headed Brome | Stace | A2 | 153--50--lan | Ca | Roth | 0920003040 |
| Bromus lepidus | Slender Soft-brome | Yes | A1 | 153--50--5 | Ne | Holmb. | 0920000268 |
| Bromus pectinatus | Clement | A3 | 153--50--pec | Thunb. | 0920006018 | ||
| Bromus pseudosecalinus | Smith's Brome | Yes | A1 | 153--50--8 | Ne | P.M. Sm. | 0920002382 |
| Bromus racemosus | Smooth Brome | Yes | A1 | 153--50--3 | N | L. | 0920000271 |
| Bromus scoparius | Clement | A3 | 153--50--sco | L. | 0920005601 | ||
| Bromus secalinus | Rye Brome | Yes | A1 | 153--50--7 | Ar | L. | 0920000273 |
| Bromus squarrosus | Clement | A3 | 153--50--squ | L. | 0920000274 | ||
| Bromus trinii | Clement | A3 | 153--50--tri | E. Desv. | 0920006019 | ||
| Browallia americana | Clement | A3 | 110--BRO--ame | L. | 0920006020 | ||
| Browallia speciosa | Bush-violet | Clement | A3 | 110--BRO--spe | Hook. | 0920006021 | |
| Brunnera macrophylla | Great Forget-me-not | Yes | A1 | 116--5--1 | Ne | (Adams) I.M. Johnst. | 0920007197 |
| Bryonia dioica | White Bryony | Page 11 | A1 | 60--1--1 | N | Jacq. | 0920000276 |
| Buddleja alternifolia | Alternate-leaved Butterfly-bush | Yes | A1 | 122--1--1 | Ne | Maxim. | 0920007198 |
| Buddleja davidii | Butterfly-bush | Page 11 | A1 | 122--1--2 | Ne | Franch. | 0920000277 |
| Buddleja davidii x globosa = B. x weyeriana | Weyer's Butterfly-bush | Yes S1 | A1 | 122--1--2 x 3 | Ne | Weyer | 0920007842 |
| Buddleja globosa | Orange-ball-tree | Yes | A1 | 122--1--3 | Ne | Hope | 0920004372 |
| Buddleja lindleyana | Clement | A3 | 122--1--lin | Fortune ex Lindl. | 0920006022 | ||
| Bulbostylis humilis | Clement | A3 | 152--BUL--hum | (Kunth) C.B. Clarke | 0920006023 | ||
| Bulbostylis striatella | Clement | A3 | 152--BUL--str | C.B. Clarke | 0920006024 | ||
| Bunias erucago | Southern Warty-cabbage | Clement | A3 | 62--6--eru | L. | 0920000280 | |
| Bunias orientalis | Warty-cabbage | Yes | A1 | 62--6--1 | Ne | L. | 0920000281 |
| Bunium bulbocastanum | Great Pignut | Yes | A1 | 107--11--1 | N | L. | 0920000282 |
| Buphthalmum salicifolium | Clement | A3 | 135--BUP--sal | L. | 0920007974 | ||
| Bupleurum baldense | Small Hare's-ear | Yes | A1 | 107--26--4 | N | Turra | 0920000285 |
| Bupleurum croceum | Clement | A3 | 107--26--cro | Fenzl | 0920006025 | ||
| Bupleurum falcatum | Sickle-leaved Hare's-ear | Yes | A1 | 107--26--2 | Ne | L. | 0920000283 |
| Bupleurum fruticosum | Shrubby Hare's-ear | Yes | A1 | 107--26--1 | Ne | L. | 0920000284 |
| Bupleurum nodiflorum | Clement | A3 | 107--26--nod | Sibth. & Sm. | 0920006026 | ||
| Bupleurum odontites | Clement | A3 | 107--26--odo | L. | 0920006027 | ||
| Bupleurum petraeum | Rock Hare's-ear | Clement | A3 | 107--26--pet | L. | 0920006028 | |
| Bupleurum rotundifolium | Thorow-wax | Stace | A2 | 107--26--rot | Ar | L. | 0920000286 |
| Bupleurum semicompositum | Clement | A3 | 107--26--sem | L. | 0920006029 | ||
| Bupleurum subovatum | False Thorow-wax | Yes | A1 | 107--26--5 | Ne | Link ex Spreng. | 0920004423 |
| Bupleurum tenuissimum | Slender Hare's-ear | Yes | A1 | 107--26--3 | N | L. | 0920000287 |
| Butomus umbellatus | Flowering-rush | Page 11 | A1 | 136--1--1 | N | L. | 0920000288 |
| Buxus balearica | Balearic Box | Clement | A3 | 90--1--bal | Lam. | 0920004139 | |
| Buxus sempervirens | Box | Yes | A1 | 90--1--1 | N | L. | 0920000289 |