| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| MOBU | Monoblastia buckei R. C. Harris | | Monoblastiaceae
|
| MOCY2 | Monoblastia cypressi R. C. Harris | | Monoblastiaceae
|
| MORA3 | Monoblastia rappii Zahlbr. | | Monoblastiaceae
|
| MONOB | Monoblastia Riddle | monoblastia | Monoblastiaceae
|
| MOHA2 | Monochoria hastata (L.) Solms | arrowleaf falsepickerelweed | Pontederiaceae
|
| MOVAP | Monochoria vaginalis (Burm. f.) K. Presl ex Kunth var. pauciflora (Blume) Merr. | Monochoria vaginalis | Pontederiaceae
|
| MOVA | Monochoria vaginalis (Burm. f.) K. Presl ex Kunth | heartshape false pickerelweed | Pontederiaceae
|
| MONOC | Monochoria K. Presl | monochoria | Pontederiaceae
|
| MOMY | Monodora myristica (Gaertner) Dunal | calabash nutmeg | Annonaceae
|
| MONOD | Monodora Dunal | monodora | Annonaceae
|
| MONU | Monolepis nuttalliana (J.A. Schultes) Greene | Nuttall's povertyweed | Chenopodiaceae
|
| MOPU3 | Monolepis pusilla Torr. ex S. Wats. | small povertyweed | Chenopodiaceae
|
| MOSP | Monolepis spathulata Gray | beaver povertyweed | Chenopodiaceae
|
| MONOL | Monolepis Schrad. | povertyweed | Chenopodiaceae
|
| MOGR | Monolopia gracilens Gray | woodland monolopia | Asteraceae
|
| MOLA3 | Monolopia lanceolata Nutt. | common monolopia | Asteraceae
|
| MOMA2 | Monolopia major DC. | cupped monolopia | Asteraceae
|
| MOST | Monolopia stricta Crum | Crum's monolopia | Asteraceae
|
| MONOL2 | Monolopia DC. | monolopia | Asteraceae
|
| MOBE | Monoptilon bellidiforme Torr. & Gray ex Gray | daisy desertstar | Asteraceae
|
| MOBE2 | Monoptilon bellioides (Gray) Hall | Mojave desertstar | Asteraceae
|
| MONOP | Monoptilon Torr. & Gray | desertstar | Asteraceae
|
| MOBR4 | Monotropa brittonii Small | Monotropa uniflora | Monotropaceae
|
| MOHYL2 | Monotropa hypopithys L. ssp. lanuginosa (Michx.) Hara | Monotropa hypopithys | Monotropaceae
|
| MOHYA | Monotropa hypopithys L. var. americana (DC.) Domin | Monotropa hypopithys | Monotropaceae
|
| MOHYL3 | Monotropa hypopithys L. var. latisquama (Rydb.) Kearney & Peebles | Monotropa hypopithys | Monotropaceae
|
| MOHYR | Monotropa hypopithys L. var. rubra (Torr.) Farw. | Monotropa hypopithys | Monotropaceae
|
| MOHY3 | Monotropa hypopithys L. | pinesap | Monotropaceae
|
| MOLA10 | Monotropa lanuginosa Michx. | Monotropa hypopithys | Monotropaceae
|
| MOLA4 | Monotropa latisquama (Rydb.) Hult�n | Monotropa hypopithys | Monotropaceae
|
| MOUN3 | Monotropa uniflora L. | Indianpipe | Monotropaceae
|
| MONOT | Monotropa L. | Indianpipe | Monotropaceae
|
| MOLE2 | Monotropsis lehmaniae Burnham | Monotropsis odorata | Monotropaceae
|
| MOODL | Monotropsis odorata Schwein. ex Ell. var. lehmaniae (Burnham) Ahles | Monotropsis odorata | Monotropaceae
|
| MOOD2 | Monotropsis odorata Schwein. ex Ell. | pygmypipes | Monotropaceae
|
| MORE | Monotropsis reynoldsiae (Gray) Heller | Monotropsis odorata | Monotropaceae
|
| MONOT2 | Monotropsis Schwein. ex Ell. | pygmypipes | Monotropaceae
|
| MOSQF | Monroa squarrosa (Nutt.) Torr. var. floccuosa Vasey ex Beal | Monroa squarrosa | Poaceae
|
| MOSQ | Monroa squarrosa (Nutt.) Torr. | false buffalograss | Poaceae
|
| MONRO | Monroa Torr. | false buffalograss | Poaceae
|
| MOAD | Monstera adansonii Schott | Adanson's monstera | Araceae
|
| MODE | Monstera deliciosa Liebm. | tarovine | Araceae
|
| MOPE4 | Monstera pertusa (L.) de Vriese | Monstera adansonii | Araceae
|
| MONST | Monstera Adans. | monstera | Araceae
|
| MOHI2 | Montagnaea hibiscifolia Benth. | Montanoa hibiscifolia | Asteraceae
|
| MOHI | Montanoa hibiscifolia (Benth.) Standl. | treedaisy | Asteraceae
|
| MONTA | Montanoa Llave & Lex. | montanoa | Asteraceae
|
| MOSP5 | Montezuma speciosissima DC. | Thespesia grandiflora | Malvaceae
|
| MOAR5 | Montia arenicola (Henderson) T.J. Howell | Claytonia arenicola | Portulacaceae
|
| MOBO | Montia bostockii (Porsild) Welsh | Bostock's minerslettuce | Portulacaceae
|
| MOCH | Montia chamissoi (Ledeb. ex Spreng.) Greene | water minerslettuce | Portulacaceae
|
| MOCO4 | Montia cordifolia (S. Wats.) Pax & K. Hoffmann | Claytonia cordifolia | Portulacaceae
|
| MODI2 | Montia dichotoma (Nutt.) T.J. Howell | dwarf minerslettuce | Portulacaceae
|
| MODI3 | Montia diffusa (Nutt.) Greene | spreading minerslettuce | Portulacaceae
|
| MODI6 | Montia dipetala Suksdorf | Montia fontana | Portulacaceae
|
| MOFL | Montia flagellaris (Bong.) B.L. Robins. | Montia parvifolia ssp. flagellaris | Portulacaceae
|
| MOFOA | Montia fontana L. ssp. amporitana auct. non Sennen | Montia fontana | Portulacaceae
|
| MOFOC2 | Montia fontana L. ssp. chondrosperma (Fenzl) Walt. | Montia fontana | Portulacaceae
|
| MOFOL | Montia fontana L. var. lamprosperma (Cham.) Fenzl | Montia fontana | Portulacaceae
|
| MOFOT | Montia fontana L. var. tenerrima (Gray) Fern. & Wieg. | Montia fontana | Portulacaceae
|
| MOFO | Montia fontana L. | annual water minerslettuce | Portulacaceae
|
| MOGY2 | Montia gypsophiloides (Fisch. & C.A. Mey.) T.J. Howell | Claytonia gypsophiloides | Portulacaceae
|
| MOHA | Montia hallii (Gray) Greene | Montia fontana | Portulacaceae
|
| MOHE2 | Montia heterophylla (Torr. & Gray) Jepson | Claytonia heterophylla | Portulacaceae
|
| MOHO | Montia howellii S. Wats. | Howell's minerslettuce | Portulacaceae
|
| MOLA5 | Montia lamprosperma Cham. | Montia fontana | Portulacaceae
|
| MOLI4 | Montia linearis (Dougl. ex Hook.) Greene | narrowleaf minerslettuce | Portulacaceae
|
| MOMI2 | Montia minor K.C. Gmel. | Montia fontana | Portulacaceae
|
| MOPA5 | Montia parviflora (Dougl. ex Hook.) T.J. Howell | Claytonia parviflora ssp. parviflora | Portulacaceae
|
| MOPAF | Montia parvifolia (Moc. ex DC.) Greene ssp. flagellaris (Bong.) Ferris | littleleaf minerslettuce | Portulacaceae
|
| MOPAP | Montia parvifolia (Moc. ex DC.) Greene ssp. parvifolia | littleleaf minerslettuce | Portulacaceae
|
| MOPAF2 | Montia parvifolia (Moc. ex DC.) Greene var. flagellaris (Bong.) C.L. Hitchc. | Montia parvifolia ssp. flagellaris | Portulacaceae
|
| MOPA2 | Montia parvifolia (Moc. ex DC.) Greene | littleleaf minerslettuce | Portulacaceae
|
| MOPEG | Montia perfoliata (Donn ex Willd.) T.J. Howell ssp. glauca (Nutt. ex Torr. & Gray) Ferris | Claytonia exigua ssp. glauca | Portulacaceae
|
| MOPED | Montia perfoliata (Donn ex Willd.) T.J. Howell var. depressa (Gray) Jepson | Claytonia rubra ssp. depressa | Portulacaceae
|
| MOPEN | Montia perfoliata (Donn ex Willd.) T.J. Howell var. nubigena (Greene) Jepson | Claytonia gypsophiloides | Portulacaceae
|
| MOPEP | Montia perfoliata (Donn ex Willd.) T.J. Howell var. parviflora (Dougl. ex Hook.) Jepson | Claytonia parviflora ssp. parviflora | Portulacaceae
|
| MOPEU | Montia perfoliata (Donn ex Willd.) T.J. Howell var. utahensis (Rydb.) Munz | Claytonia parviflora ssp. utahensis | Portulacaceae
|
| MOPE3 | Montia perfoliata (Donn ex Willd.) T.J. Howell | Claytonia perfoliata ssp. perfoliata | Portulacaceae
|
| MOSA6 | Montia sarmentosa (C.A. Mey.) B.L. Robins. | Claytonia sarmentosa | Portulacaceae
|
| MOSA3 | Montia saxosa (Brandeg.) Brandeg. ex B.L. Robins. | Claytonia saxosa | Portulacaceae
|
| MOSC2 | Montia scammaniana (Hult�n) Welsh | Claytonia scammaniana | Portulacaceae
|
| MOSIB | Montia sibirica (L.) T.J. Howell var. bulbifera (Gray) B.L. Robins. | Claytonia sibirica var. bulbifera | Portulacaceae
|
| MOSIH | Montia sibirica (L.) T.J. Howell var. heterophylla (Torr. & Gray) B.L. Robins. | Claytonia heterophylla | Portulacaceae
|
| MOSI2 | Montia sibirica (L.) T.J. Howell | Claytonia sibirica var. sibirica | Portulacaceae
|
| MOSPE | Montia spathulata (Dougl. ex Hook.) T.J. Howell var. exigua (Torr. & Gray) B.L. Robins. | Claytonia exigua ssp. exigua | Portulacaceae
|
| MOSPR | Montia spathulata (Dougl. ex Hook.) T.J. Howell var. rosulata (Eastw.) J.T. Howell | Claytonia exigua ssp. exigua | Portulacaceae
|
| MOSPT | Montia spathulata (Dougl. ex Hook.) T.J. Howell var. tenuifolia (Torr. & Gray) Munz | Claytonia exigua ssp. exigua | Portulacaceae
|
| MOSPV | Montia spathulata (Dougl. ex Hook.) T.J. Howell var. viridis A. Davids. | Claytonia parviflora ssp. viridis | Portulacaceae
|
| MOVE3 | Montia verna Neck. | Montia fontana | Portulacaceae
|
| MONTI | Montia L. | minerslettuce | Portulacaceae
|
| MODI5 | Montiastrum dichotomum (Nutt.) Rydb. | Montia dichotoma | Portulacaceae
|
| MOLI6 | Montiastrum lineare (Dougl. ex Hook.) Rydb. | Montia linearis | Portulacaceae
|
| MOAR3 | Montrichardia arborescens (L.) Schott | yautia madera | Araceae
|
| MOLI7 | Montrichardia linifera (Arruda) Schott | aninga | Araceae
|
| MONTR | Montrichardia Creuger | montrichardia | Araceae
|
| MOCA6 | Morella californica (Cham. & Schlecht.) Wilbur | California wax myrtle | Myricaceae
|
| MOCA7 | Morella caroliniensis (P. Mill.) Small | southern bayberry | Myricaceae
|
| MOCE2 | Morella cerifera (L.) Small | wax myrtle | Myricaceae
|
| MOFA | Morella faya (Ait.) Wilbur | firetree | Myricaceae
|
| MOHO3 | Morella holdridgeana (Lundell) Kartesz, comb. nov. ined. | Palo de cera | Myricaceae
|