| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| MIST3 | Mitella stauropetala Piper | smallflower miterwort | Saxifragaceae
|
| MIST7 | Mitella stenopetala Piper | Mitella stauropetala var. stenopetala | Saxifragaceae
|
| MITRT | Mitella trifida Graham var. trifida | threeparted miterwort | Saxifragaceae
|
| MITRV | Mitella trifida Graham var. violacea (Rydb.) Rosendahl | threeparted miterwort | Saxifragaceae
|
| MITR4 | Mitella trifida Graham | threeparted miterwort | Saxifragaceae
|
| MIVI5 | Mitella violacea Rydb. | Mitella trifida var. violacea | Saxifragaceae
|
| MITEL | Mitella L. | miterwort | Saxifragaceae
|
| MICA10 | Mitellastra caulescens (Nutt.) T.J. Howell | Mitella caulescens | Saxifragaceae
|
| MIBR7 | Mitracarpus breviflorus Gray | white girdlepod | Rubiaceae
|
| MIFRP | Mitracarpus frigidus (Willd. ex Roemer & J.A. Schultes) K. Schum. var. portoricensis Urban | Mitracarpus portoricensis | Rubiaceae
|
| MIHI2 | Mitracarpus hirtus (L.) DC. | tropical girdlepod | Rubiaceae
|
| MIMA6 | Mitracarpus maxwelliae Britt. & Wilson | Maxwell's girdlepod | Rubiaceae
|
| MIPO2 | Mitracarpus polycladus Urban | cana gorda girdlepod | Rubiaceae
|
| MIPO4 | Mitracarpus portoricensis (Urban) Urban | Puerto Rico girdlepod | Rubiaceae
|
| MIVI3 | Mitracarpus villosus (Sw.) Cham. & Schlecht. ex DC. | Mitracarpus hirtus | Rubiaceae
|
| MITRA | Mitracarpus Zucc. | girdlepod | Rubiaceae
|
| MIAN5 | Mitreola angustifolia (Torr. & Gray) J. Nelson | Mitreola sessilifolia | Loganiaceae
|
| MIPE3 | Mitreola petiolata (J.F. Gmel.) Torr. & Gray | lax hornpod | Loganiaceae
|
| MISE3 | Mitreola sessilifolia (J.F. Gmel.) G. Don | swamp hornpod | Loganiaceae
|
| MITRE | Mitreola L. | hornpod | Loganiaceae
|
| MIDI10 | Mittenothamnium diminutivum (Hampe) Britt. | Chryso-hypnum diminutivum | Hypnaceae
|
| MISH2 | Mittenothamnium sharpii (Crum & Anderson) Buck | Leptohymenium sharpii | Hylocomiaceae
|
| MNCY | Mnesithea cylindrica (Michx.) Koning & Sosef | Coelorachis cylindrica | Poaceae
|
| MNGR2 | Mnesithea granularis (L.) Koning & Sosef | Hackelochloa granularis | Poaceae
|
| MNRU2 | Mnesithea rugosa (Nutt.) Koning & Sosef | Coelorachis rugosa | Poaceae
|
| MNTE | Mnesithea tessellata (Steud.) Koning & Sosef | Coelorachis tessellata | Poaceae
|
| MNTU | Mnesithea tuberculosa (Nash) Koning & Sosef | Coelorachis tuberculosa | Poaceae
|
| MNAL | Mniobryum albicans (Wahlenb.) Limpr. | Pohlia wahlenbergii | Bryaceae
|
| MNLO | Mniobryum longibracteatum (Broth. in R�ll) Broth. | Pohlia longibracteata | Bryaceae
|
| MNWAG | Mniobryum wahlenbergii (Web. & Mohr) Jenn. var. glacialis (Brid.) Wijk & Marg. | Pohlia wahlenbergii | Bryaceae
|
| MNWA | Mniobryum wahlenbergii (Web. & Mohr) Jenn. | Pohlia wahlenbergii | Bryaceae
|
| MNAFC | Mnium affine Bland. ex Funck var. ciliare C. M�ll. | Plagiomnium ciliare | Mniaceae
|
| MNAFI | Mnium affine Bland. ex Funck var. integrifolium (Lindb.) Milde | Plagiomnium ellipticum | Mniaceae
|
| MNAFR | Mnium affine Bland. ex Funck var. rugicum (Laur.) Bruch & Schimp. in B.S.G. | Plagiomnium ellipticum | Mniaceae
|
| MNAM | Mnium ambiguum H. M�ll. | ambiguous calcareous moss | Mniaceae
|
| MNAN | Mnium andrewsianum Steere | Rhizomnium andrewsianum | Mniaceae
|
| MNAR | Mnium arizonicum Amann | Arizona calcareous moss | Mniaceae
|
| MNBL70 | Mnium blyttii Bruch & Schimp in B.S.G. | Blytt's calcareous moss | Mniaceae
|
| MNCA | Mnium carolinianum Anderson | Plagiomnium carolinianum | Mniaceae
|
| MNCI | Mnium ciliare (C. M�ll.) Schimp. | Plagiomnium ciliare | Mniaceae
|
| MNCI2 | Mnium cinclidioides H�b. | Pseudobryum cinclidioides | Mniaceae
|
| MNCU | Mnium curvatulum (Lindb.) Lindb. | Plagiomnium medium var. curvatulum | Mniaceae
|
| MNCUT | Mnium cuspidatum Hedw. var. tenellum Kindb. in Mac. & Kindb. | Plagiomnium cuspidatum | Mniaceae
|
| MNCU2 | Mnium cuspidatum Hedw. | Plagiomnium cuspidatum | Mniaceae
|
| MNDE | Mnium decurrens C. M�ll. & Kindb. in Mac. & Kindb. | Mnium thomsonii | Mniaceae
|
| MNDR | Mnium drummondii Bruch & Schimp. | Plagiomnium drummondii | Mniaceae
|
| MNEL | Mnium ellipticum Brid. | Plagiomnium ellipticum | Mniaceae
|
| MNFL | Mnium flagellare Sull. & Lesq. | Trachycystis flagellaris | Mniaceae
|
| MNGLC | Mnium glabrescens Kindb. ssp. chlorophyllosum Kindb. | Rhizomnium punctatum | Mniaceae
|
| MNGL | Mnium glabrescens Kindb. | Rhizomnium glabrescens | Mniaceae
|
| MNGR | Mnium gracile (T. Kop.) Crum & Anderson | Rhizomnium gracile | Mniaceae
|
| MNHO | Mnium hornum Hedw. | horn calcareous moss | Mniaceae
|
| MNHY | Mnium hymenophylloides H�b. | Cyrtomnium hymenophylloides | Mniaceae
|
| MNHY2 | Mnium hymenophyllum Bruch & Schimp. in B.S.G. | Cyrtomnium hymenophyllum | Mniaceae
|
| MNIN | Mnium inclinatum Lindb. | Mnium ambiguum | Mniaceae
|
| MNINI | Mnium insigne Mitt. var. intermedium Kindb. in Mac. | Plagiomnium insigne | Mniaceae
|
| MNIN2 | Mnium insigne Mitt. | Plagiomnium insigne | Mniaceae
|
| MNKO | Mnium koponenii Crum | Rhizomnium gracile | Mniaceae
|
| MNLO2 | Mnium longirostre Brid. | Plagiomnium rostratum | Mniaceae
|
| MNLYI | Mnium lycopodioides Schwaegr. var. inclinatum (Lindb.) Wijk & Marg. | Mnium ambiguum | Mniaceae
|
| MNMA2 | Mnium magnifolium Horik. | Rhizomnium magnifolium | Mniaceae
|
| MNMA70 | Mnium marginatum (With.) Brid. ex P. Beauv. | olivegreen calcareous moss | Mniaceae
|
| MNMEB | Mnium medium Bruch & Schimp. in B.S.G. ssp. boreale Kindb. | Plagiomnium medium var. curvatulum | Mniaceae
|
| MNMEC | Mnium medium Bruch & Schimp. in B.S.G. ssp. curvatulum Lindb. | Plagiomnium medium var. curvatulum | Mniaceae
|
| MNMEC2 | Mnium medium Bruch & Schimp. in B.S.G. var. curvatulum (Lindb.) Kindb. | Plagiomnium medium var. curvatulum | Mniaceae
|
| MNMEI | Mnium medium Bruch & Schimp. in B.S.G. var. integrifolium Lindb. | Plagiomnium medium var. curvatulum | Mniaceae
|
| MNME | Mnium medium Bruch & Schimp. in B.S.G. | Plagiomnium medium var. medium | Mniaceae
|
| MNME2 | Mnium menziesii Hook. | Leucolepis acanthoneuron | Mniaceae
|
| MNNU | Mnium nudum Britt. & Williams | Rhizomnium nudum | Mniaceae
|
| MNOR70 | Mnium orthorrhynchum Brid. | Atrichum tenellum | Polytrichaceae
|
| MNOR | Mnium orthorrhynchum auct plur. | Mnium thomsonii | Mniaceae
|
| MNPS | Mnium pseudopunctatum Bruch & Schimp. | Rhizomnium pseudopunctatum | Mniaceae
|
| MNPUA | Mnium punctatum Hedw. var. appalachianum (T. Kop.) Crum & Anderson | Rhizomnium appalachianum | Mniaceae
|
| MNPUE | Mnium punctatum Hedw. var. elatum Schimp. | Rhizomnium magnifolium | Mniaceae
|
| MNPUE2 | Mnium punctatum Hedw. var. elatum auct. plur. | Rhizomnium appalachianum | Mniaceae
|
| MNPU | Mnium punctatum Hedw. | Rhizomnium punctatum | Mniaceae
|
| MNRI | Mnium riparium Mitt. | Mnium ambiguum | Mniaceae
|
| MNRO | Mnium rostratum Schrad. | Plagiomnium rostratum | Mniaceae
|
| MNRU | Mnium rugicum Laur. | Plagiomnium ellipticum | Mniaceae
|
| MNSA | Mnium saximontanum M. Bowers | Mnium arizonicum | Mniaceae
|
| MNSE | Mnium serratum Schrad. ex Brid. | Mnium marginatum | Mniaceae
|
| MNSP70 | Mnium spinosum (Voit) Schwaegr. | spinosum calcareous moss | Mniaceae
|
| MNSP2 | Mnium spinulosum Bruch & Schimp. in B.S.G. | largetooth calcareous moss | Mniaceae
|
| MNST | Mnium stellare Hedw. | stellar calcareous moss | Mniaceae
|
| MNSU | Mnium subglobosum Bruch & Schimp. in B.S.G. | Rhizomnium pseudopunctatum | Mniaceae
|
| MNSY | Mnium sylvaticum Lindb. | Plagiomnium cuspidatum | Mniaceae
|
| MNTH70 | Mnium thomsonii Schimp. | Thomson's calcareous moss | Mniaceae
|
| MNVE | Mnium venustum Mitt. | Plagiomnium venustum | Mniaceae
|
| MNIUM2 | Mnium Hedw. | mnium calcareous moss | Mniaceae
|
| MOAN3 | Mobergia angelica (Stizenb.) H. Mayrh. & Sheard | | Physciaceae
|
| MOCA5 | Mobergia calculiformis (W. A. Weber) H. Mayrh. & Sheard | | Physciaceae
|
| MOBER | Mobergia H. Mayrh. & Sheard | mobergia | Physciaceae
|
| MOCA | Modiola caroliniana (L.) G. Don | Carolina bristlemallow | Malvaceae
|
| MOMU | Modiola multifida Moench | Modiola caroliniana | Malvaceae
|
| MODIO | Modiola Moench | bristlemallow | Malvaceae
|
| MOLA6 | Moehringia lateriflora (L.) Fenzl | bluntleaf sandwort | Caryophyllaceae
|
| MOMA3 | Moehringia macrophylla (Hook.) Fenzl | largeleaf sandwort | Caryophyllaceae
|
| MOTR2 | Moehringia trinervia (L.) Clairv. | | Caryophyllaceae
|
| MOEHR | Moehringia L. | sandwort | Caryophyllaceae
|
| MOER | Moenchia erecta (L.) P.G. Gaertn., B. Mey. & Scherb. | upright chickweed | Caryophyllaceae
|
| MOENC | Moenchia Ehrh. | upright chickweed | Caryophyllaceae
|