| Accepted Latin Names | Common Name | In Kent? | Type | Kent ref. | Status | Authority | Record No. |
|---|---|---|---|---|---|---|---|
| Macleaya cordata | Five-seeded Plume-poppy | Clement | A3 | 30--7--cor | (Willd.) R. Br. | 0920006963 | |
| Macleaya cordata x microcarpa = M. x kewensis | Hybrid Plume-poppy | Yes | A1 | 30--7--cor x mic | Ne | Turrill | 0920007446 |
| Madia glomerata | Mountain Tarweed | Clement | A3 | 135--MAD--glo | Hook. | 0920008124 | |
| Madia sativa | Coast Tarweed | Clement | A3 | 135--MAD--sat | Molina | 0920004228 | |
| Magnolia acuminata | Cucumber-tree | Clement | A3 | 23A--MAG--acu | L. | 0920006964 | |
| Mahonia aquifolium | Oregon-grape | Page 55 | A1 | 29--2--1 | Ne | (Pursh) Nutt. | 0920001228 |
| Mahonia aquifolium x repens = M. x decumbens | Newmarket Oregon-grape | Yes | A1 | 29--2--1 x rep | Ne | Stace | 0920007447 |
| Mahonia japonica | Clement | A3 | 29--2--jap | (Thunb.) DC. | 0920006966 | ||
| Maianthemum bifolium | May Lily | Yes | A1 | 158--15--1 | ?N | (L.) F.W. Schmidt | 0920001229 |
| Maianthemum kamtschaticum | False Lily-of-the-valley | Yes S1 | A1 | 158--15--kam | Ne | (Cham.) Nakai | 0920003490 |
| Malcolmia africana | Clement | A3 | 62--9--afr | (L.) W.T. Aiton | 0920004514 | ||
| Malcolmia crenulata | Clement | A3 | 62--9--cre | (DC.) Boiss. | 0920006967 | ||
| Malcolmia maritima | Virginia Stock | Yes | A1 | 62--9--1 | Ne | (L.) W.T. Aiton | 0920004515 |
| Malope malacoides | Clement | A3 | 53--MAL--mal | L. | 0920004255 | ||
| Malope trifida | Mallow-wort | Clement | A3 | 53--MAL--tri | Cav. | 0920004254 | |
| Malus atrosanguinea x niedzwetskyana = M. x purpurea | Purple Crab | Yes | A1 | 75--27--nie x atr | Ne | (E. Barbier) Rehder | 0920007448 |
| Malus baccata | Siberian Crab | Clement | A3 | 75--27--bac | (L.) Borkh. | 0920008126 | |
| Malus baccata x prunifolia = M. x robusta | Clement | A3 | 75--27--bac x pru | (CarriŠre) Rehder | 0920006973 | ||
| Malus floribunda | Japanese Crab | Clement | A3 | 75--27--flo | Siebold ex Van Houtte | 0920008127 | |
| Malus hupehensis | Hupeh Crab | Clement | A3 | 75--27--hup | (Pamp.) Rehder | 0920004082 | |
| Malus prunifolia | Plum-leaved Apple | Clement | A3 | 75--27--pru | (Willd.) Borkh. | 0920006969 | |
| Malus pumila | Apple | Page 55 | A1 | 75--27--2 | Mill. | 0920001230.1 | |
| Malus sieboldii | Siebold's Crab | Clement | A3 | 75--27--sie | (Regel) Rehder | 0920006970 | |
| Malus spectabilis | Chinese Crab | Clement | A3 | 75--27--spe | (Aiton) Borkh. | 0920006971 | |
| Malus sylvestris | Crab Apple | Page 55 | A1 | 75--27--1 | N | (L.) Mill. | 0920001230.2 |
| Malus sylvestris agg. | Aggregate | AK | 75--27--- | ||||
| Malva aegyptia | Clement | A3 | 53--1--aeg | L. | 0920005611 | ||
| Malva alcea | Greater Musk-mallow | Yes | A1 | 53--1--2 | Ne | L. | 0920007449 |
| Malva brasiliensis | Clement | A3 | 53--1--bra | Desr. | 0920006974 | ||
| Malva cretica | Clement | A3 | 53--1--cre | Cav. | 0920006975 | ||
| Malva hispanica | Clement | A3 | 53--1--his | L. | 0920006976 | ||
| Malva moschata | Musk-mallow | Page 55 | A1 | 53--1--1 | N | L. | 0920001232 |
| Malva neglecta | Dwarf Mallow | Page 55 | A1 | 53--1--7 | Ar | Wallr. | 0920001233 |
| Malva nicaeensis | French Mallow | Yes | A1 | 53--1--4 | Ne | All. | 0920002424 |
| Malva oxyloba | Clement | A3 | 53--1--oxy | Boiss. | 0920006977 | ||
| Malva parviflora | Least Mallow | Yes | A1 | 53--1--5 | Ne | L. | 0920001234 |
| Malva pusilla | Small Mallow | Yes | A1 | 53--1--6 | Ne | Sm. | 0920001235 |
| Malva sylvestris | Common Mallow | Page 55 | A1 | 53--1--3 | Ar | L. | 0920001236 |
| Malva verticillata | Chinese Mallow | Yes | A1 | 53--1--8 | Ne | L. | 0920001237 |
| Malvastrum americanum | Clement | A3 | 53--MAV--ame | (L.) Torr. | 0920006978 | ||
| Malvastrum campanulatum | Clement | A3 | 53--MAV--cam | (Paxton) G. Nicholson | 0920006979 | ||
| Malvastrum coromandelianum | Broomweed | Clement | A3 | 53--MAV--cor | (L.) Garcke | 0920006981 | |
| Malvastrum multicaule | Clement | A3 | 53--MAV--mul | (Schltdl.) Britton | 0920006983 | ||
| Mangifera indica | Mango | Clement | A3 | 100--MAN--ind | L. | 0920006984 | |
| Mantisalca salmantica | Clement | A3 | 135--MAN--sal | (L.) Briq. & Cavill. | 0920004229 | ||
| Margyricarpus pinnatus | Pearl-fruit | Clement | A3 | 75--MAR--pin | (Lam.) Kuntze | 0920006985 | |
| Marrubium alysson | Clement | A3 | 118--9--aly | L. | 0920005612 | ||
| Marrubium peregrinum | Clement | A3 | 118--9--per | L. | 0920005631 | ||
| Marrubium vulgare | White Horehound | Yes | A1 | 118--9--1 | N | L. | 0920001238 |
| Matricaria aurea | Clement | A3 | 135--59--aur | (Loefl.) Sch. Bip. | 0920006986 | ||
| Matricaria decipiens | Clement | A3 | 135--59--dec | (Fisch. & C.A. Mey.) K. Koch | 0920008128 | ||
| Matricaria disciformis | Clement | A3 | 135--59--dis | (C.A. Mey.) DC. | 0920001240 | ||
| Matricaria discoidea | Pineappleweed | Page 55 | A1 | 135--59--2 | Ne | DC. | 0920001242 |
| Matricaria oreades | Lawn Pyrethrum | Clement | A3 | 135--59--ore | Boiss. | 0920006987 | |
| Matricaria recutita | Scented Mayweed | Page 55 | A1 | 135--59--1 | Ar | L. | 0920001239 |
| Matricaria trichophylla | Clement | A3 | 135--59--tri | (Boiss.) Boiss. | 0920006988 | ||
| Matteuccia struthiopteris | Ostrich Fern | Yes | A1 | 16--1--1 | Ne | (L.) Tod. | 0910002504 |
| Matthiola fruticulosa | Sad Stock | Clement | A3 | 62--10--fru | (L.) Maire | 0920008129 | |
| Matthiola incana | Hoary Stock | Yes | A1 | 62--10--1 | Ne | (L.) W.T. Aiton | 0920001244 |
| Matthiola longipetala | Night-scented Stock | Stace | A2 | 62--10--lon | Ca | (Vent.) DC. | 0920004356 |
| Matthiola longipetala subsp. bicornis | Stace | A2 | 62--10--lon--a | (Sibth. & Sm.) P.W. Ball | 0920004356 | ||
| Matthiola sinuata | Sea Stock | Yes | A1 | 62--10--2 | ?N | (L.) W.T. Aiton | 0920001245 |
| Matthiola tricuspidata | Clement | A3 | 62--10--tri | (L.) W.T. Aiton | 0920008130 | ||
| Meconopsis cambrica | Welsh Poppy | Page 55 | A1 | 30--2--1 | N | (L.) Vig. | 0920001246 |
| Medicago arabica | Spotted Medick | Page 55 | A1 | 77--18--5 | N | (L.) Huds. | 0920001247 |
| Medicago arborea | Tree Medick | Clement | A3 | 77--18--arb | L. | 0920008131 | |
| Medicago blancheana | Clement | A3 | 77--18--bla | Boiss. | 0920006989 | ||
| Medicago coronata | Clement | A3 | 77--18--cor | (L.) Bartal. | 0920006990 | ||
| Medicago disciformis | Clement | A3 | 77--18--dis | DC. | 0920006991 | ||
| Medicago doliata | Clement | A3 | 77--18--dol | Carmign. | 0920006993 | ||
| Medicago glutinosa | Clement | A3 | 77--18--glu | M. Bieb. | 0920006994 | ||
| Medicago intertexta | Hedgehog Medick | Clement | A3 | 77--18--int | (L.) Mill. | 0920006995 | |
| Medicago laciniata | Tattered Medick | Stace | A2 | 77--18--lac | Ca | (L.) Mill. | 0920008132 |
| Medicago littoralis | Shore Medick | Clement | A3 | 77--18--lit | Rohde ex Loisel. | 0920006996 | |
| Medicago lupulina | Black Medick | Page 55 | A1 | 77--18--1 | N | L. | 0920001250 |
| Medicago marina | Sea Medick | Clement | A3 | 77--18--mar | L. | 0920006997 | |
| Medicago minima | Bur Medick | Yes | A1 | 77--18--3 | N | (L.) Bartal. | 0920001251 |
| Medicago murex | Clement | A3 | 77--18--mur | Willd. | 0920006998 | ||
| Medicago noeana | Clement | A3 | 77--18--noe | Boiss. | 0920007000 | ||
| Medicago orbicularis | Button Medick | Clement | A3 | 77--18--orb | (L.) Bartal. | 0920005560 | |
| Medicago polymorpha | Toothed Medick | Yes | A1 | 77--18--4 | N | L. | 0920001249 |
| Medicago praecox | Early Medick | Stace | A2 | 77--18--pra | Ca | DC. | 0920008133 |
| Medicago prostrata | Clement | A3 | 77--18--pro | DC. | 0920007001 | ||
| Medicago radiata | Clement | A3 | 77--18--rad | L. | 0920007002 | ||
| Medicago rigidula | Clement | A3 | 77--18--rig | (L.) All. | 0920007003 | ||
| Medicago rotata | Clement | A3 | 77--18--rot | Boiss. | 0920007004 | ||
| Medicago rugosa | Clement | A3 | 77--18--rug | Desr. | 0920007005 | ||
| Medicago sativa | Page 55 | A1 | 77--18--2 | L. | 0920007129 | ||
| Medicago sativa subsp. falcata | Sickle Medick | Yes | A1 | 77--18--2--a | N | (L.) Arcang. | 0920001248 |
| Medicago sativa subsp. sativa | Lucerne | Yes | A1 | 77--18--2--c | Ne | 0920001252 | |
| Medicago sativa subsp. varia | Sand Lucerne | Yes | A1 | 77--18--2--b | ? | (Martyn) Arcang. | 0920001253 |
| Medicago scutellata | Snail Medick | Clement | A3 | 77--18--scu | (L.) Mill. | 0920007007 | |
| Medicago soleirolii | Clement | A3 | 77--18--sol | Duby | 0920007008 | ||
| Medicago tenoreana | Clement | A3 | 77--18--ten | Ser. | 0920007009 | ||
| Medicago tornata | Clement | A3 | 77--18--tor | (L.) Mill. | 0920007010 | ||
| Medicago truncatula | Strong-spined Medick | Yes S3 | A1 | 77--18--tru | Ne | Gaertn. | 0920008134 |
| Medicago turbinata | Clement | A3 | 77--18--tur | (L.) All. | 0920007011 | ||
| Melampyrum arvense | Field Cow-wheat | Yes | A1 | 124--19--2 | Ne | L. | 0920001254 |
| Melampyrum barbatum | Clement | A3 | 124--19--bar | Waldst. & Kit. ex Willd. | 0920007012 | ||
| Melampyrum cristatum | Crested Cow-wheat | Yes | A1 | 124--19--1 | N | L. | 0920001255 |
| Melampyrum pratense | Common Cow-wheat | Page 55 | A1 | 124--19--3 | N | L. | 0920001256 |
| Melampyrum pratense subsp. commutatum | Yes | A1 | 124--19--3--b | (Tausch ex A. Kern.) C.E. Britton | 0920001256.1 | ||
| Melampyrum pratense subsp. pratense | Yes | A1 | 124--19--3--a | 0920001256.4 | |||
| Melampyrum sylvaticum | Small Cow-wheat | Yes | A1 | 124--19--4 | N | L. | 0920001257 |
| Melica ciliata | Clement | A3 | 153--25--cil | L. | 0920007013 | ||
| Melica nutans | Mountain Melick | Page 55 | A1 | 153--25--1 | N | L. | 0920001262 |
| Melica uniflora | Wood Melick | Page 55 | A1 | 153--25--2 | N | Retz. | 0920001263 |
| Melica violacea | Clement | A3 | 153--25--vio | Cav. | 0920007014 | ||
| Melilotus albus | White Melilot | Page 55 | A1 | 77--17--2 | Ne | Medik. | 0920001264 |
| Melilotus altissimus | Tall Melilot | Page 55 | A1 | 77--17--1 | Ar | Thuill. | 0920001265 |
| Melilotus elegans | Clement | A3 | 77--17--ele | Salzm. ex Ser. | 0920007015 | ||
| Melilotus indicus | Small Melilot | Yes | A1 | 77--17--4 | Ne | (L.) All. | 0920001266 |
| Melilotus infestus | Clement | A3 | 77--17--inf | Guss. | 0920005620 | ||
| Melilotus messanensis | Sicilian Melilot | Clement | A3 | 77--17--mes | (L.) All. | 0920007016 | |
| Melilotus neapolitanus | Clement | A3 | 77--17--nea | Ten. | 0920004102 | ||
| Melilotus officinalis | Ribbed Melilot | Page 55 | A1 | 77--17--3 | Ne | (L.) Pall. | 0920001267 |
| Melilotus polonicus | Clement | A3 | 77--17--pol | (L.) Pall. | 0920007017 | ||
| Melilotus sulcatus | Furrowed Melilot | A2 | 77--17--sul | Ca | Desf. | 0920008135 | |
| Melilotus wolgicus | Clement | A3 | 77--17--wol | Poir. | 0920007018 | ||
| Melinis repens | Clement | A3 | 153--MEL--rep | (Willd.) Zizka | |||
| Melissa officinalis | Balm | Page 55 | A1 | 118--16--1 | Ne | L. | 0920001268 |
| Melittis melissophyllum | Bastard Balm | Yes | A1 | 118--8--1 | N | L. | 0920001269 |
| Mentha aquatica | Water Mint | Page 55 | A1 | 118--23--2 | N | L. | 0920001272 |
| Mentha aquatica x spicata = M. x piperita | Peppermint | Yes | A1 | 118--23--2 x 3 | ? | L. | 0920001279 |
| Mentha aquatica x suaveolens = M. x suavis | Yes | A1 | 118--23--2 x 4 | Guss. | 0920001271 | ||
| Mentha arvensis | Corn Mint | Page 57 | A1 | 118--23--1 | N | L. | 0920001273 |
| Mentha arvensis x aquatica = M. x verticillata | Whorled Mint | Yes | A1 | 118--23--1 x 2 | N | L. | 0920001286 |
| Mentha arvensis x aquatica x spicata = M. x smithiana | Tall Mint | Yes | A1 | 118--23--1 x 2 x 3 | Ne | R.A. Graham | 0920001284 |
| Mentha arvensis x spicata = M. x gracilis | Bushy Mint | Yes | A1 | 118--23--1 x 3 | ? | Sole | 0920001276 |
| Mentha arvensis x suaveolens = M. x carinthiaca | Yes | A1 | 118--23--1 x 4 | Host | 0920001278 | ||
| Mentha longifolia | Horse Mint | Clement | A3 | 118--23--lon | (L.) Huds. | 0920007019 | |
| Mentha pulegium | Pennyroyal | Yes | A1 | 118--23--5 | N | L. | 0920001280 |
| Mentha requienii | Corsican Mint | Yes | A1 | 118--23--6 | Ne | Benth. | 0920001281 |
| Mentha spicata | Spear Mint | Page 57 | A1 | 118--23--3 | Ar | L. | 0920001285 |
| Mentha spicata x longifolia = M. x villosonervata | Sharp-toothed Mint | Yes | A1 | 118--23--3 x lon | Ne | Opiz | 0920002631 |
| Mentha spicata x suaveolens = M. x villosa | Apple-mint | Page 57 | A1 | 118--23--3 x 4 | Ne | Huds. | 0920001270 |
| Mentha suaveolens | Round-leaved Mint | Yes | A1 | 118--23--4 | N | Ehrh. | 0920001282 |
| Mentha suaveolens x longifolia = M. x rotundifolia | False Apple-mint | Yes | A1 | 118--23--4 x lon | N | (L.) Huds. | 0920002630 |
| Mentzelia albicaulis | White-stemmed Stickleaf | Clement | A3 | 60B--MEN--alb | (Douglas ex Hook.) Douglas ex Hook. | 0920007020 | |
| Mentzelia lindleyi | Golden Bartonia | Clement | A3 | 60B--MEN--lin | Torr. & A. Gray | 0920007021 | |
| Menyanthes trifoliata | Bogbean | Page 57 | A1 | 113--1--1 | N | L. | 0920001289 |
| Mercurialis annua | Annual Mercury | Page 57 | A1 | 91--1--2 | Ar | L. | 0920001290 |
| Mercurialis perennis | Dog's Mercury | Page 57 | A1 | 91--1--1 | N | L. | 0920001291 |
| Merremia sibirica | Clement | A3 | 111--MER--sib | (L.) Haller f. | 0920007022 | ||
| Mertensia ciliata | Clement | A3 | 116--11--cil | G. Don | 0920007024 | ||
| Mertensia maritima | Oysterplant | Yes | A1 | 116--11--1 | N | (L.) Gray | 0920001292 |
| Mertensia virginica | Virginia-bluebells | Clement | A3 | 116--11--vir | (L.) Pers. | 0920007026 | |
| Mesembryanthemum crystallinum | Common Iceplant | Clement | A3 | 42--MES--cry | L. | 0920007027 | |
| Mesembryanthemum nodiflorum | Clement | A3 | 42--MES--nod | L. | 0920007028 | ||
| Mespilus germanica | Medlar | Yes | A1 | 75--34--1 | Ar | L. | 0920001293 |
| Mespilus germanica x Crataegus laevigata = X Crataemespilus grandiflora | Haw-medlar | Yes | A1 | 75--34 x 35--1 x 8 | (Sm.) E.G. Camus | 0920002703 | |
| Metasequoia glyptostroboides | Dawn Redwood | Clement | A3 | 20A--MET--gly | Hu & W.C. Cheng | 0920008136 | |
| Meum athamanticum | Spignel | Page 57 | A1 | 107--23--1 | N | Jacq. | 0920001294 |
| Mibora minima | Early Sand-grass | Yes | A1 | 153--45--1 | N | (L.) Desv. | 0920001295 |
| Micropsis spathulata | Clement | A3 | 135--MIC--spa | (Pers.) Cabrera | 0920007030 | ||
| Milium effusum | Wood Millet | Page 57 | A1 | 153--11--1 | N | L. | 0920001296 |
| Milium vernale | Early Millet | Yes | A1 | 153--11--2 | N | M. Bieb. | 0920001297 |
| Milium vernale subsp. sarniense | Yes | A1 | 153--11--2--a | D.C. McClint. | 0920001297 | ||
| Millotia muelleri | Common Bow-flower | Clement | A3 | 135--MIL--mue | (Sond.) P.S. Short | 0920007031 | |
| Millotia myosotidifolia | Broad-leaved Millotia | Clement | A3 | 135--MIL--myo | (Benth.) Steetz | 0920007032 | |
| Millotia perpusilla | Tiny Bow-flower | Clement | A3 | 135--MIL--per | (Turcz.) P.S. Short | 0920007033 | |
| Millotia tenuifolia | Soft Millotia | Clement | A3 | 135--MIL--ten | Cass. | 0920007034 | |
| Mimulus cardinalis | Scarlet Monkeyflower | Clement | A3 | 124--4--car | Douglas ex Benth. | 0920007035 | |
| Mimulus guttatus | Monkeyflower | Page 57 | A1 | 124--4--2 | Ne | DC. | 0920004328 |
| Mimulus guttatus x cupreus = M. x burnetii | Coppery Monkeyflower | Yes | A1 | 124--4--2 x cup | Ne | S. Arn. | 0920004329 |
| Mimulus guttatus x luteus = M. x robertsii | Hybrid Monkeyflower | Page 57 | A1 | 124--4--2 x 3 | Ne | Silverside | 0920004331 |
| Mimulus guttatus x luteus x cupreus | Yes | A1 | 124--4--2 x 3 x cup | Ne | 0920004330 | ||
| Mimulus luteus | Blood-drop-emlets | Yes S3 | A1 | 124--4--3 | Ne | L. | 0920001299 |
| Mimulus luteus agg. | Aggregate | AK | 124--4--- | ||||
| Mimulus luteus x cupreus = M. x maculosus | Scottish Monkeyflower | Yes | A1 | 124--4--3 x cup | Ne | T. Moore | 0920007450 |
| Mimulus moschatus | Musk | Yes | A1 | 124--4--1 | Ne | Douglas ex Lindl. | 0920001300 |
| Mimulus ringens | Allegheny Monkeyflower | Clement | A3 | 124--4--rin | L. | 0920007036 | |
| Minuartia hybrida | Fine-leaved Sandwort | Yes | A1 | 46--4--5 | N | (Vill.) Schischk. | 0920001303 |
| Minuartia hybrida subsp. tenuifolia | Yes S1 | A1 | 46--4--5--a | (L.) Kergu‚len | 0920001303 | ||
| Minuartia laricifolia | Clement | A3 | 46--4--lar | (L.) Schinz & Thell. | 0920007037 | ||
| Minuartia recurva | Recurved Sandwort | Yes | A1 | 46--4--1 | N | (All.) Schinz & Thell. | 0920002270 |
| Minuartia rubella | Mountain Sandwort | Yes | A1 | 46--4--3 | N | (Wahlenb.) Hiern | 0920001301 |
| Minuartia sedoides | Cyphel | Yes | A1 | 46--4--6 | N | (L.) Hiern | 0920000501 |
| Minuartia stricta | Teesdale Sandwort | Yes | A1 | 46--4--4 | N | (Sw.) Hiern | 0920001302 |
| Minuartia verna | Spring Sandwort | Page 57 | A1 | 46--4--2 | N | (L.) Hiern | 0920001304 |
| Mirabilis jalapa | Marvel-of-Peru | Clement | A3 | 41A--MIR--jal | L. | 0920008137 | |
| Miscanthus sacchariflorus | Clement | A3 | 153--MIS--sac | (Maxim.) Hack. | 0920007039 | ||
| Miscanthus sinensis | Clement | A3 | 153--MIS--sin | Andersson | 0920004124 | ||
| Misopates calycinum | Pale Weasel's-snout | Clement | A2 | 124--9--cal | Ca | Rothm. | 0920008138 |
| Misopates orontium | Weasel's-snout | Yes | A1 | 124--9--1 | Ar | (L.) Raf. | 0920000128 |
| Mitella caulescens | Star-shaped Mitrewort | Clement | A3 | 74--MIT--cau | Nutt. ex Torr. & A. Gray | 0920007041 | |
| Mitella diphylla | Two-leaved Mitrewort | Clement | A3 | 74--MIT--dip | L. | 0920007042 | |
| Modiola caroliniana | Bristly-fruited Mallow | Clement | A3 | 53--MOD--car | (L.) G. Don | 0920007043 | |
| Moehringia trinervia | Three-nerved Sandwort | Page 57 | A1 | 46--2--1 | N | (L.) Clairv. | 0920001305 |
| Moenchia erecta | Upright Chickweed | Yes | A1 | 46--9--1 | N | (L.) P. Gaertn., B. Mey. & Scherb. | 0920001306 |
| Molinia caerulea | Purple Moor-grass | Page 57 | A1 | 153--63--1 | N | (L.) Moench | 0920001307 |
| Molinia caerulea subsp. arundinacea | Yes | A1 | 153--63--1--b | (Schrank) K. Richt. | 0920001307.1 | ||
| Molinia caerulea subsp. caerulea | Yes | A1 | 153--63--1--a | 0920001307.2 | |||
| Moluccella laevis | Bells-of-Ireland | Clement | A3 | 118--MOL--lae | L. | 0920007044 | |
| Momordica charantia | Balsam-pear | Clement | A3 | 60--MOM--cha | L. | 0920007045 | |
| Monarda citriodora | Lemon Beebalm | Clement | A3 | 118--MON--cit | Cerv. ex Lag. | 0920007047 | |
| Monarda didyma | Clement | A3 | 118--MON--did | L. | 0920007048 | ||
| Moneses uniflora | One-flowered Wintergreen | Yes | A1 | 66--3--1 | N | (L.) A. Gray | 0920001308 |
| Monolepis nuttalliana | Povertyweed | Clement | A3 | 43--MON--nut | (Schult.) Greene | 0920007049 | |
| Monopsis debilis | Clement | A3 | 129--MON--deb | (L. f.) C. Presl | 0920007050 | ||
| Monotropa hypopitys | Yellow Bird's-nest | Page 57 | A1 | 67--1--1 | N | L. | 0920001310 |
| Monotropa hypopitys subsp. hypophegea | Yes | A1 | 67--1--1--b | (Wallr.) Holmboe | 0920001309 | ||
| Monotropa hypopitys subsp. hypopitys | Yes | A1 | 67--1--1--a | 0920001311 | |||
| Monsonia angustifolia | Clement | A3 | 103--MON--ang | E. Mey. ex A. Rich. | 0920007051 | ||
| Monsonia brevirostrata | Short-fruited Dysentery-herb | Stace | A2 | 103--MON--bre | Ca | R. Knuth | 0920008139 |
| Montia fontana | Blinks | Page 57 | A1 | 45--3--1 | N | L. | 0920001312 |
| Montia fontana subsp. amporitana | Yes | A1 | 45--3--1--c | N | Sennen | 0920001312.3 | |
| Montia fontana subsp. chondrosperma | Yes S1 | A1 | 45--3--1--d | N | (Fenzl) Walters | 0920001312.1 | |
| Montia fontana subsp. fontana | Yes | A1 | 45--3--1--a | N | 0920001312.2 | ||
| Montia fontana subsp. variabilis | Yes | A1 | 45--3--1--b | N | Walters | 0920001312.4 | |
| Montia parvifolia | Small-leaved Blinks | Yes | A1 | 45--3--2 | Ne | (Mo‡.) Greene | 0920007451 |
| Moricandia arvensis | Violet Cabbage | Clement | A3 | 62--MOR--arv | (L.) DC. | 0920004491 | |
| Morina longifolia | Whorl-flower | Clement | A3 | 134--MOR--lon | Wall. ex DC. | 0920007053 | |
| Morus alba | White Mulberry | Clement | A3 | 35--1--alb | L. | 0920004185 | |
| Morus nigra | Black Mulberry | Yes | A1 | 35--1--1 | Ne | L. | 0920007452 |
| Muehlenbeckia complexa | Wireplant | Yes | A1 | 47--6--1 | Ne | (A. Cunn.) Meisn. | 0920004388 |
| Muhlenbergia distichophylla | Clement | A3 | 153--MUH--dis | (J. Presl) Kunth | 0920007054 | ||
| Muhlenbergia racemosa | Clement | A3 | 153--MUH--rac | (Michx.) Britton, Sterns & Poggenb. | 0920007055 | ||
| Muhlenbergia schreberi | Clement | A3 | 153--MUH--sch | J.F. Gmel. | 0920007056 | ||
| Munroa squarrosa | False Buffalo-grass | Clement | A3 | 153--MUN--squ | (Nutt.) Torr. | 0920007057 | |
| Muscari armeniacum | Garden Grape-hyacinth | Yes | A1 | 158--23--2 | Ne | Leichtlin ex Baker | 0920004338 |
| Muscari azureum | Clement | A3 | 158--23--azu | Fenzl | 0920004172 | ||
| Muscari botryoides | Compact Grape-hyacinth | Clement | A3 | 158--23--bot | Ne | (L.) Mill. | 0920004339 |
| Muscari comosum | Tassel Hyacinth | Yes | A1 | 158--23--4 | Ne | (L.) Mill. | 0920001314 |
| Muscari neglectum | Grape-hyacinth | Yes | A1 | 158--23--1 | ?N | Guss. ex Ten. | 0920001313 |
| Myagrum perfoliatum | Mitre Cress | Clement | A3 | 62--MYA--per | L. | 0920004355 | |
| Mycelis muralis | Wall Lettuce | Page 57 | A1 | 135--24--1 | N | (L.) Dumort. | 0920001315 |
| Myosotis alpestris | Alpine Forget-me-not | Yes | A1 | 116--15--6 | N | F.W. Schmidt | 0920001316 |
| Myosotis alpina | Clement | A3 | 116--15--alp | Lapeyr. | 0920007058 | ||
| Myosotis arvensis | Field Forget-me-not | Page 57 | A1 | 116--15--8 | Ar | (L.) Hill | 0920001317 |
| Myosotis discolor | Changing Forget-me-not | Page 57 | A1 | 116--15--10 | N | Pers. | 0920001321 |
| Myosotis dissitiflora | Clement | A3 | 116--15--dis | Baker | 0920007059 | ||
| Myosotis laxa | Tufted Forget-me-not | Page 57 | A1 | 116--15--4 | N | Lehm. | 0920001319 |
| Myosotis laxa subsp. caespitosa | Yes | A1 | 116--15--4--a | (Schultz) Hyl. ex Nordh. | 0920001319 | ||
| Myosotis ramosissima | Early Forget-me-not | Page 57 | A1 | 116--15--9 | N | Rochel | 0920001320 |
| Myosotis scorpioides | Water Forget-me-not | Page 59 | A1 | 116--15--1 | N | L. | 0920001322 |
| Myosotis scorpioides x laxa = M. x suzae | Yes | A1 | 116--15--1 x 4 | Domin | 0920002808 | ||
| Myosotis secunda | Creeping Forget-me-not | Page 59 | A1 | 116--15--2 | N | Al. Murray | 0920001323 |
| Myosotis sicula | Jersey Forget-me-not | Yes | A1 | 116--15--5 | N | Guss. | 0920001324 |
| Myosotis stolonifera | Pale Forget-me-not | Yes | A1 | 116--15--3 | N | (DC.) J. Gay ex Leresche & Levier | 0920001318 |
| Myosotis sylvatica | Wood Forget-me-not | Page 59 | A1 | 116--15--7 | N | Ehrh. ex Hoffm. | 0920001325 |
| Myosotis verna | Clement | A3 | 116--15--ver | Nutt. | 0920007060 | ||
| Myosoton aquaticum | Water Chickweed | Page 59 | A1 | 46--8--1 | N | (L.) Moench | 0920001326 |
| Myosurus minimus | Mousetail | Yes | A1 | 28--15--1 | ?N | L. | 0920001327 |
| Myrica gale | Bog-myrtle | Page 59 | A1 | 38--1--1 | N | L. | 0920001328 |
| Myrica pensylvanica | Bayberry | Yes S1 | A1 | 38--1--2 | Ne | Loisel. ex Duhamel | 0920001329 |
| Myriocephalus rhizocephalus | Tufted Woolly-heads | Clement | A3 | 135--MYR--rhi | (DC.) Benth. | 0920007061 | |
| Myriophyllum alterniflorum | Alternate Water-milfoil | Page 59 | A1 | 79--2--4 | N | DC. | 0920001330 |
| Myriophyllum aquaticum | Parrot's-feather | Page 59 | A1 | 79--2--2 | Ne | (Vell.) Verdc. | 0920004433 |
| Myriophyllum heterophyllum | Various-leaved Water-milfoil | Clement | A3 | 79--2--het | Michx. | 0920004496 | |
| Myriophyllum spicatum | Spiked Water-milfoil | Page 59 | A1 | 79--2--3 | N | L. | 0920001331 |
| Myriophyllum verrucosum | Red Water-milfoil | Clement | A3 | 79--2--ver | Lindl. | 0920004495 | |
| Myriophyllum verticillatum | Whorled Water-milfoil | Yes | A1 | 79--2--1 | N | L. | 0920001332 |
| Myrrhis odorata | Sweet Cicely | Page 59 | A1 | 107--8--1 | Ne | (L.) Scop. | 0920001333 |
| Myrrhoides nodosa | Clement | A3 | 107--MYR--nod | (L.) Cannon | 0920007063 | ||
| Myrsine africana | African Boxwood | Clement | A3 | 68A--MYR--afr | L. | 0920008142 |