| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| MELO7 | Melicope lohiauana (B.C. Stone) T.G. Hartley & B.C. Stone | Melicope kavaiensis | Rutaceae
|
| MELY | Melicope lydgatei (Hbd.) T.G. Hartley & B.C. Stone | Koolau Range melicope | Rutaceae
|
| MEMA6 | Melicope macropus (Hbd.) T.G. Hartley & B.C. Stone | Kaholuamanu melicope | Rutaceae
|
| MEMA7 | Melicope makahae (B.C. Stone) T.G. Hartley & B.C. Stone | Makaha Valley melicope | Rutaceae
|
| MEMA17 | Melicope mauii T.G. Hartley & B.C. Stone | Maui melicope | Rutaceae
|
| MEMO6 | Melicope molokaiensis (Hbd.) T.G. Hartley & B.C. Stone | Molokai melicope | Rutaceae
|
| MEMU4 | Melicope mucronulata (St. John) T.G. Hartley & B.C. Stone | alani | Rutaceae
|
| MEMU5 | Melicope munroi (St. John) T.G. Hartley & B.C. Stone | lanahale | Rutaceae
|
| MENE4 | Melicope nealiae (B.C. Stone) T.G. Hartley & B.C. Stone | Kokee Plateau melicope | Rutaceae
|
| MEOA | Melicope oahuensis (Levl.) T.G. Hartley & B.C. Stone | Oahu melicope | Rutaceae
|
| MEOB4 | Melicope obovata (St. John) T.G. Hartley & B.C. Stone | Makawao melicope | Rutaceae
|
| MEOR4 | Melicope orbicularis (Hbd.) T.G. Hartley & B.C. Stone | Honokahua melicope | Rutaceae
|
| MEOV | Melicope ovalis (St. John) T.G. Hartley & B.C. Stone | Hana melicope | Rutaceae
|
| MEOV2 | Melicope ovata (St. John & Hume) T.G. Hartley & B.C. Stone | eggshape melicope | Rutaceae
|
| MEPA6 | Melicope pallida (Hbd.) T.G. Hartley & B.C. Stone | pale melicope | Rutaceae
|
| MEPA7 | Melicope paniculata (St. John) T.G. Hartley & B.C. Stone | Lihue melicope | Rutaceae
|
| MEPE9 | Melicope peduncularis (Levl.) T.G. Hartley & B.C. Stone | boxfruit alani | Rutaceae
|
| MEPS | Melicope pseudoanisata (Rock) T.G. Hartley & B.C. Stone | Kohala Summit melicope | Rutaceae
|
| MEPU8 | Melicope puauluensis (St. John) T.G. Hartley & B.C. Stone | Melicope pseudoanisata | Rutaceae
|
| MEPU4 | Melicope puberula (St. John) T.G. Hartley & B.C. Stone | hairy melicope | Rutaceae
|
| MEQU3 | Melicope quadrangularis (St. John & Hume) T.G. Hartley & B.C. Stone | fourangle melicope | Rutaceae
|
| MERA2 | Melicope radiata (St. John) T.G. Hartley & B.C. Stone | kapu melicope | Rutaceae
|
| MERE3 | Melicope reflexa (St. John) T.G. Hartley & B.C. Stone | lava melicope | Rutaceae
|
| MERO3 | Melicope rotundifolia (Gray) T.G. Hartley & B.C. Stone | roundleaf melicope | Rutaceae
|
| MESA4 | Melicope saint-johnii (Hume) T.G. Hartley & B.C. Stone | St. John's melicope | Rutaceae
|
| MESA5 | Melicope sandwicensis (Hook. & Arn.) T.G. Hartley & B.C. Stone | Mt. Kaala melicope | Rutaceae
|
| MEVO | Melicope volcanica (Gray) T.G. Hartley & B.C. Stone | volcanic melicope | Rutaceae
|
| MEWA2 | Melicope waialealae (Wawra) T.G. Hartley & B.C. Stone | alani wai | Rutaceae
|
| MEWA3 | Melicope wailauensis (St. John) T.G. Hartley & B.C. Stone | Wailau Valley melicope | Rutaceae
|
| MEWA4 | Melicope wawraeana (Rock) T.G. Hartley & B.C. Stone | Monoa melicope | Rutaceae
|
| MEZA | Melicope zahlbruckneri (Rock) T.G. Hartley & B.C. Stone | kipuka piaula | Rutaceae
|
| MELIC3 | Melicope (J.R. & G. Forst.) T.G. Hartley & B.C. Stone | melicope | Rutaceae
|
| MESA9 | Melicytus samoensis (Christophersen) A.C. Smith | | Violaceae
|
| MELIC5 | Melicytus J.R. & G. Forst. | | Violaceae
|
| MEAL12 | Melilotus alba Medikus | white sweetclover | Fabaceae
|
| MEALA2 | Melilotus albus Medik. var. annuus Coe | Melilotus officinalis | Fabaceae
|
| MEAL2 | Melilotus albus Medik. | Melilotus officinalis | Fabaceae
|
| MEAL13 | Melilotus altissima Thuill. | tall yellow sweetclover | Fabaceae
|
| MEAL3 | Melilotus altissimus Thuill. | tall yellow sweetclover | Fabaceae
|
| MEGR10 | Melilotus gracilis DC. | Melilotus neapolitanus | Fabaceae
|
| MEIN14 | Melilotus indica (L.) All. | sourclover | Fabaceae
|
| MEIN2 | Melilotus indicus (L.) All. | annual yellow sweetclover | Fabaceae
|
| MENE | Melilotus neapolitanus Ten. | European sweetclover | Fabaceae
|
| MEOF | Melilotus officinalis (L.) Lam. | yellow sweetclover | Fabaceae
|
| MESU12 | Melilotus suaveolens Ledeb. | sweetclover | Fabaceae
|
| MESU2 | Melilotus sulcatus Desf. | Mediterranean sweetclover | Fabaceae
|
| MELIL | Melilotus P. Mill. | sweetclover | Fabaceae
|
| MEMI2 | Melinis minutiflora Beauv. | molassesgrass | Poaceae
|
| MERE9 | Melinis repens (Willd.) Zizka | rose Natal grass | Poaceae
|
| MELIN | Melinis Beauv. | stinkgrass | Poaceae
|
| MEHE | Meliosma herbertii Rolfe | aguacatillo | Sabiaceae
|
| MEOB2 | Meliosma obtusifolia (Bello) Krug & Urban | cacaillo | Sabiaceae
|
| MELIO | Meliosma Blume | meliosma | Sabiaceae
|
| MEOF2 | Melissa officinalis L. | common balm | Lamiaceae
|
| MEPU7 | Melissa pulegioides (L.) L. | Hedeoma pulegioides | Lamiaceae
|
| MELIS | Melissa L. | balm | Lamiaceae
|
| MESI2 | Mellichampia sinaloensis (Brandeg.) Kearney & Peebles | Cynanchum ligulatum | Asclepiadaceae
|
| MEIN7 | Melocactus intortus (P. Mill.) Urban | Turk's cap | Cactaceae
|
| MELOC2 | Melocactus Link & Otto | melocactus | Cactaceae
|
| MECO4 | Melochia corchorifolia L. | chocolateweed | Sterculiaceae
|
| MECO9 | Melochia cordata Burm. f. | Sida cordata | Malvaceae
|
| MEHIG | Melochia hirsuta Cav. var. glabrescens Gray | Melochia spicata | Sterculiaceae
|
| MEHI7 | Melochia hirsuta Cav. | Melochia spicata | Sterculiaceae
|
| MEIN11 | Melochia indica Kurz | Melochia umbellata | Sterculiaceae
|
| MENO | Melochia nodiflora Sw. | bretonica prieta | Sterculiaceae
|
| MEPY | Melochia pyramidata L. | pyramidflower | Sterculiaceae
|
| MESP6 | Melochia spicata (L.) Fryxell | bretonica peluda | Sterculiaceae
|
| METOF | Melochia tomentosa L. var. frutescens (Jacq.) A. DC. | Melochia tomentosa | Sterculiaceae
|
| METO4 | Melochia tomentosa L. | teabush | Sterculiaceae
|
| MEUM3 | Melochia umbellata (Houtt.) Stapf | hierba del soldado | Sterculiaceae
|
| MEVI5 | Melochia villosa (P. Mill.) Fawcett & Rendle | Melochia spicata | Sterculiaceae
|
| MELOC | Melochia L. | melochia | Sterculiaceae
|
| MECR8 | Melothria crassifolia Small | Melothria pendula var. crassifolia | Cucurbitaceae
|
| MEGU | Melothria guadalupensis (Spreng.) Cogn. | Melothria pendula var. pendula | Cucurbitaceae
|
| MEMI4 | Melothria microcarpa Shuttlw. | Melothria pendula var. aspera | Cucurbitaceae
|
| MENA | Melothria nashii Small | Melothria pendula var. aspera | Cucurbitaceae
|
| MEPEA | Melothria pendula L. var. aspera Cogn. | Guadeloupe cucumber | Cucurbitaceae
|
| MEPEC2 | Melothria pendula L. var. chlorocarpa (Engelm.) Cogn. | Melothria pendula var. pendula | Cucurbitaceae
|
| MEPEC | Melothria pendula L. var. crassifolia (Small) Cogn. | Guadeloupe cucumber | Cucurbitaceae
|
| MEPEP | Melothria pendula L. var. pendula | Guadeloupe cucumber | Cucurbitaceae
|
| MEPE3 | Melothria pendula L. | Guadeloupe cucumber | Cucurbitaceae
|
| MELOT | Melothria L. | melothria | Cucurbitaceae
|
| MEAN7 | Melpomense anfractuosa (Kunze ex Klotzsch) A.R. Sm. & R.C. Moran | zigzag dwarf polypody | Grammitidaceae
|
| MEFL5 | Melpomense flabelliformis (Poir.) A.R. Sm. & C.R. Moran | fanleaf dwarf polypody | Grammitidaceae
|
| MELPO | Melpomense A.R. Sm. & R.C. Moran | dwarf polypody | Grammitidaceae
|
| MEPE10 | Menegazzia pertusa (Schrank) Stein | Menegazzia terebrata | Parmeliaceae
|
| METE7 | Menegazzia terebrata (Hoffm.) A. Massal. | honeycombed lichen | Parmeliaceae
|
| MENEG | Menegazzia A. Massal. | honeycombed lichen | Parmeliaceae
|
| MEBI2 | Menendezia biflora (Cogn.) Britt. | Tetrazygia biflora | Melastomataceae
|
| MEST5 | Menendezia stahlii (Cogn.) Britt. | Tetrazygia urbanii | Melastomataceae
|
| MEUR | Menendezia urbanii (Cogn.) Britt. | Tetrazygia urbanii | Melastomataceae
|
| MERE4 | Meniscium reticulatum (L.) Sw. | Thelypteris reticulata | Thelypteridaceae
|
| MESE4 | Meniscium serratum Cav. | Thelypteris serrata | Thelypteridaceae
|
| MECA3 | Menispermum canadense L. | common moonseed | Menispermaceae
|
| MENIS | Menispermum L. | moonseed | Menispermaceae
|
| MEDEL | Menodora decemfida (Gill ex Hook. & Arn.) Gray var. longifolia Steyermark | tenfinger menodora | Oleaceae
|
| MEDE | Menodora decemfida (Gill ex Hook. & Arn.) Gray | tenfinger menodora | Oleaceae
|
| MEHE2 | Menodora heterophylla Moric. ex DC. | low menodora | Oleaceae
|
| MELO2 | Menodora longiflora Gray | showy menodora | Oleaceae
|
| MESCG | Menodora scabra Gray var. glabrescens Gray | Menodora scabra | Oleaceae
|
| MESCL | Menodora scabra Gray var. laevis (Woot. & Standl.) Steyermark | Menodora scabra | Oleaceae
|