| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| MELAM2 | Melampyrum L. | cowwheat | Scrophulariaceae
|
| MEMA12 | Melanaria macounii Lamb | Pertusaria macounii | Pertusariaceae
|
| MEAFB | Melandrium affine (J. Vahl ex Fries) J. Vahl var. brachycalyx (Raup) Hult�n | Silene involucrata ssp. elatior | Caryophyllaceae
|
| MEAF4 | Melandrium affine (J. Vahl ex Fries) J. Vahl | Silene involucrata ssp. involucrata | Caryophyllaceae
|
| MEAL10 | Melandrium album (P. Mill.) Garcke | Silene latifolia ssp. alba | Caryophyllaceae
|
| MEANT | Melandrium angustiflorum (Rupr.) Walp. ssp. tenellum (Tolm.) Kozh. | Silene tayloriae | Caryophyllaceae
|
| MEAPA2 | Melandrium apetalum (L.) Fenzl ssp. arcticum (Fries) Hult�n | Silene uralensis ssp. uralensis | Caryophyllaceae
|
| MEAPA | Melandrium apetalum (L.) Fenzl ssp. attenuatum (Farr) Hara | Silene uralensis ssp. attenuata | Caryophyllaceae
|
| MEAPO | Melandrium apetalum (L.) Fenzl ssp. ogilviense Porsild | Silene uralensis ssp. ogilviensis | Caryophyllaceae
|
| MEAPG | Melandrium apetalum (L.) Fenzl var. glabrum (Regel) Hult�n | Silene uralensis ssp. uralensis | Caryophyllaceae
|
| MEAP | Melandrium apetalum (L.) Fenzl | Silene uralensis ssp. uralensis | Caryophyllaceae
|
| MEBR2 | Melandrium brachycalyx Raup | Silene involucrata ssp. elatior | Caryophyllaceae
|
| MEDIR | Melandrium dioicum (L.) Coss. & Germ. ssp. rubrum (Wieg.) D. L�ve | Silene dioica | Caryophyllaceae
|
| MEDI7 | Melandrium dioicum (L.) Coss. & Germ. | Silene dioica | Caryophyllaceae
|
| MEDR2 | Melandrium drummondii (Hook.) Hult�n | Silene drummondii var. drummondii | Caryophyllaceae
|
| MEFU3 | Melandrium furcatum (Raf.) Hadac | Silene involucrata ssp. involucrata | Caryophyllaceae
|
| MEKI | Melandrium kingii (S. Wats.) Tolm. | Silene kingii | Caryophyllaceae
|
| MEMA8 | Melandrium macrospermum Porsild | Silene macrosperma | Caryophyllaceae
|
| MENO3 | Melandrium noctiflorum (L.) Fries | Silene noctiflora | Caryophyllaceae
|
| MEOS | Melandrium ostenfeldii Porsild | Silene taimyrensis | Caryophyllaceae
|
| MERU7 | Melandrium rubrum (Weig.) Garcke | Silene dioica | Caryophyllaceae
|
| MESO | Melandrium soczavianum Schischkin | Silene soczaviana | Caryophyllaceae
|
| META3 | Melandrium taimyrense Tolm. | Silene taimyrensis | Caryophyllaceae
|
| META2 | Melandrium tayloriae (B.L. Robins.) Tolm. | Silene tayloriae | Caryophyllaceae
|
| METE3 | Melandrium tenellum (Tolm.) Tolm. | Silene tayloriae | Caryophyllaceae
|
| METR7 | Melandrium triflorum (R. Br. ex Sommerf.) J. Vahl | Silene sorensenis | Caryophyllaceae
|
| MEAG | Melanelia agnata (Nyl.) Thell | | Parmeliaceae
|
| MEAL8 | Melanelia albertana (Ahti) Essl. | | Parmeliaceae
|
| MECO18 | Melanelia commixta (Nyl.) Thell | | Parmeliaceae
|
| MECU5 | Melanelia culbersonii (Hale) Thell | | Parmeliaceae
|
| MEDI60 | Melanelia disjuncta (Erichsen) Essl. | | Parmeliaceae
|
| MEEL5 | Melanelia elegantula (Zahlbr.) Essl. | | Parmeliaceae
|
| MEEX2 | Melanelia exasperata (De Not.) Essl. | | Parmeliaceae
|
| MEEX60 | Melanelia exasperatula (Nyl.) Essl. | | Parmeliaceae
|
| MEFU60 | Melanelia fuliginosa (Fr. ex Duby) Essl. | | Parmeliaceae
|
| MEGL5 | Melanelia glabra (Schaerer) Essl. | | Parmeliaceae
|
| MEGL7 | Melanelia glabratula (Lamy) Essl. | Melanelia fuliginosa | Parmeliaceae
|
| MEGL6 | Melanelia glabroides (Essl.) Essl. | | Parmeliaceae
|
| MEGR9 | Melanelia granulosa (Lynge) Essl. | Melanelia disjuncta | Parmeliaceae
|
| MEHA8 | Melanelia halei (Ahti) Essl. | | Parmeliaceae
|
| MEHE6 | Melanelia hepatizon (Ach.) Thell | | Parmeliaceae
|
| MEIN13 | Melanelia incolorata (Parr.) Essl. | Melanelia elegantula | Parmeliaceae
|
| MEIN60 | Melanelia infumata (Nyl.) Essl. | | Parmeliaceae
|
| MEMU60 | Melanelia multispora (A. Schneider) Essl. | | Parmeliaceae
|
| MEOL60 | Melanelia olivacea (L.) Eassl. | | Parmeliaceae
|
| MEOL61 | Melanelia olivaceoides (Krog) Essl. | | Parmeliaceae
|
| MEPA60 | Melanelia panniformis (Nyl.) Essl. | | Parmeliaceae
|
| MESE60 | Melanelia septentrionalis (Lynge) Essl. | | Parmeliaceae
|
| MESO60 | Melanelia sorediata (Ach.) Goward & Ahti | | Parmeliaceae
|
| MESO2 | Melanelia sorediosa (Almb.) Essl. | Melanelia sorediata | Parmeliaceae
|
| MEST60 | Melanelia stygia (L.) Essl. | | Parmeliaceae
|
| MESU4 | Melanelia subargentifera (Nyl.) Essl. | | Parmeliaceae
|
| MESU60 | Melanelia subaurifera (Nyl.) Essl. | | Parmeliaceae
|
| MESU10 | Melanelia subelegantula (Essl.) Essl. | | Parmeliaceae
|
| MESU61 | Melanelia subolivacea (Nyl.) Essl. | | Parmeliaceae
|
| MESU62 | Melanelia substygia (Rasanen) Essl. | Melanelia tominii | Parmeliaceae
|
| METO8 | Melanelia tominii (Oksner) Essl. | | Parmeliaceae
|
| METR61 | Melanelia trabeculata (Ahti) Essl. | | Parmeliaceae
|
| MELAN5 | Melanelia Essl. | melanelia | Parmeliaceae
|
| MEBO | Melanidion boreale Greene | Smelowskia borealis var. borealis | Brassicaceae
|
| MEJU | Melanolecia jurana (Schaerer) Hertel | Farnoldia jurana | Porpidiaceae
|
| MEMI7 | Melanolecia micropsis (A. Massal.) Hertel | Farnoldia micropsis | Porpidiaceae
|
| METR9 | Melanolecia transitoria (Arnold) Hertel ex Poelt | | Hymeneliaceae
|
| MELAN7 | Melanolecia Hertel | melanolecia | Hymeneliaceae
|
| MEOX | Melanomma oxysporum (Zahlbr.) D. Hawksw. | | Melanommataceae
|
| MELAN8 | Melanomma Nitschke ex Fuckel | melanomma | Melanommataceae
|
| MEUS | Melanorrhoea usitata Wallich | Burmese lacquer | Anacardiaceae
|
| MELAN9 | Melanorrhoea Wallich | melanorrhoea | Anacardiaceae
|
| MEAC3 | Melanotheca achariana Fee | Pyrenula anomala | Pyrenulaceae
|
| MEAN6 | Melanotheca anomala (Ach.) A. Massal. | Pyrenula anomala | Pyrenulaceae
|
| MECI11 | Melanotheca cinerata Zahlbr. | Pyrenula concatervans | Pyrenulaceae
|
| MECO14 | Melanotheca concatervans (Nyl.) Zahlbr. | Pyrenula concatervans | Pyrenulaceae
|
| MECR9 | Melanotheca cruenta (Mont.) Mull. Arg. | Pyrenula cruenta | Pyrenulaceae
|
| MESU11 | Melanotheca subincruenta (Nyl.) Zahlbr. | Pyrenula cruenta | Pyrenulaceae
|
| MEAN2 | Melanthera angustifolia A. Rich. | Everglades squarestem | Asteraceae
|
| MEASA | Melanthera aspera (Jacq.) Steud. ex Small var. aspera | yerba de cabra | Asteraceae
|
| MEASG | Melanthera aspera (Jacq.) Steud. ex Small var. glabriuscula (Kuntze) J.C. Parks | yerba de cabra | Asteraceae
|
| MEAS3 | Melanthera aspera (Jacq.) Steud. ex Small | yerba de cabra | Asteraceae
|
| MECA13 | Melanthera calcicola Britt. | Melanthera aspera var. glabriuscula | Asteraceae
|
| MECA12 | Melanthera canescens (Kuntze) O.E. Schulz | Melanthera aspera var. aspera | Asteraceae
|
| MECA18 | Melanthera carpenteri Small | Melanthera nivea | Asteraceae
|
| MECO6 | Melanthera confusa Britt. | Melanthera aspera var. glabriuscula | Asteraceae
|
| MEDE8 | Melanthera deltoidea Michx. | Melanthera aspera var. aspera | Asteraceae
|
| MEHA6 | Melanthera hastata Michx. | Melanthera nivea | Asteraceae
|
| MELI6 | Melanthera ligulata Small | pineland squarestem | Asteraceae
|
| MEMO9 | Melanthera montana O.E. Schulz | Melanthera aspera var. aspera | Asteraceae
|
| MENI3 | Melanthera nivea (L.) Small | snow squarestem | Asteraceae
|
| MEPA3 | Melanthera parvifolia Small | small-leaf squarestem | Asteraceae
|
| MERA3 | Melanthera radiata Small | Melanthera parvifolia | Asteraceae
|
| MELAN2 | Melanthera Rohr | squarestem | Asteraceae
|
| MEDI6 | Melanthium dispersum Small | Melanthium virginicum | Liliaceae
|
| MEHY3 | Melanthium hybridum Walt. | Melanthium latifolium | Liliaceae
|
| MELA4 | Melanthium latifolium Desr. | slender bunchflower | Liliaceae
|
| MEPA2 | Melanthium parviflorum (Michx.) S. Wats. | Appalachian bunchflower | Liliaceae
|
| MEVI2 | Melanthium virginicum L. | Virginia bunchflower | Liliaceae
|
| MEWO | Melanthium woodii (J.W. Robbins ex Wood) Bodkin | Wood's bunchflower | Liliaceae
|
| MELAN3 | Melanthium L. | bunchflower | Liliaceae
|
| MEME4 | Melasma melampyroides (L.C. Rich.) Pennell | Alectra fluminensis | Scrophulariaceae
|
| MEAM3 | Melaspilea amota Nyl. | | Melaspileaceae
|
| MEAR13 | Melaspilea arthonioides (Fee) Nyl. | | Melaspileaceae
|
| MECI10 | Melaspilea cinerascens (Willey) Fink | | Melaspileaceae
|