| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| MYCO8 | Mycocalicium compressulum Nyl. ex Szat. | Phaeocalicium compressulum | Mycocaliciaceae
|
| MYDI2 | Mycocalicium disseminatum (Ach.) Fink | Microcalicium disseminatum | Microcaliciaceae
|
| MYFU2 | Mycocalicium fuscipes (Tuck.) Fink | | Mycocaliciaceae
|
| MYMI5 | Mycocalicium microcephalum (Sm.) Fink | Sphinctrina anglica | Sphinctrinaceae
|
| MYPA5 | Mycocalicium parietinum (Ach. ex Schaerer) D. Hawksw. | Mycocalicium subtile | Mycocaliciaceae
|
| MYPU4 | Mycocalicium pusiolum (Ach.) Rasanen | Chaenothecopsis pusiola | Mycocaliciaceae
|
| MYRA | Mycocalicium rappii Nadv. | | Mycocaliciaceae
|
| MYRA2 | Mycocalicium ravenelii (Tuck.) Fink | | Mycocaliciaceae
|
| MYRE | Mycocalicium reticulatum Nadv. | | Mycocaliciaceae
|
| MYSA6 | Mycocalicium savonicum Rasanen | Chaenothecopsis savonica | Mycocaliciaceae
|
| MYSE3 | Mycocalicium sequoiae Bonar | | Mycocaliciaceae
|
| MYSU | Mycocalicium subtile (Pers.) Szat. | | Mycocaliciaceae
|
| MYCOC | Mycocalicium Vainio | mycocalicium | Mycocaliciaceae
|
| MYAC2 | Mycoglaena acuminans (Nyl.) Vainio | | Uncertain Lichen Family
|
| MYAL9 | Mycoglaena alni (Dearness & House) Barr | | Uncertain Lichen Family
|
| MYCA12 | Mycoglaena canadensis (Ellis & Everh.) Bar | | Uncertain Lichen Family
|
| MYEL2 | Mycoglaena elegans (Berk. & Curtis) Hohnel | | Uncertain Lichen Family
|
| MYME3 | Mycoglaena meridionalis (Zahlbr.) Szat. | | Uncertain Lichen Family
|
| MYMY2 | Mycoglaena myricae (Nyl.) R. C. Harris | | Uncertain Lichen Family
|
| MYQU2 | Mycoglaena quercicola R. C. Harris | | Uncertain Lichen Family
|
| MYSU4 | Mycoglaena subcoerulescens (Nyl.) Hohnel | | Uncertain Lichen Family
|
| MYCOG | Mycoglaena Hohnel | mycoglaena | Uncertain Lichen Family
|
| MYCA7 | Mycomicrothelia capitosa (Krempelh.) D. Hawksw. | | Arthopyreniaceae
|
| MYDO | Mycomicrothelia dothideaspora (Cook & Harkn.) D. Hawksw. | | Arthopyreniaceae
|
| MYHE4 | Mycomicrothelia hemisphaerica (Mull. Arg.) D. Hawksw. | | Arthopyreniaceae
|
| MYIN2 | Mycomicrothelia inaequalis (Fabre) D. Hawksw. | | Arthopyreniaceae
|
| MYSU2 | Mycomicrothelia subfallens (Mull. Arg.) D. Hawksw. | | Arthopyreniaceae
|
| MYWA2 | Mycomicrothelia wallrothii (Hepp) D. Hawksw. | | Arthopyreniaceae
|
| MYWI | Mycomicrothelia willeyana (Mull. Arg.) D. Hawksw. | | Arthopyreniaceae
|
| MYCOM | Mycomicrothelia Keissler | mycomicrothelia | Arthopyreniaceae
|
| MYCA8 | Mycoporellum californicum Zahlbr. | Mycoporum californicum | Mycoporaceae
|
| MYDI3 | Mycoporellum difforme (Minks) Fink | Mycoporum lacteum | Mycoporaceae
|
| MYHA3 | Mycoporellum hassei Zahlbr. | Mycoporum lacteum | Mycoporaceae
|
| MYSP4 | Mycoporellum sparsellum (Nyl.) Mull. Arg. | Mycoporum sparsellum | Mycoporaceae
|
| MYAC3 | Mycoporum acervatum R. C. Harris | | Mycoporaceae
|
| MYAN | Mycoporum antecellens (Nyl.) R. C. Harris | | Mycoporaceae
|
| MYBU2 | Mycoporum buckii R. C. Harris | | Mycoporaceae
|
| MYCA15 | Mycoporum californicum (Zahlbr.) R. C. Harris | | Mycoporaceae
|
| MYCO6 | Mycoporum compositum (A. Massal.) R. C. Harris | mycoporum lichen | Mycoporaceae
|
| MYES | Mycoporum eschweileri (Mull. Arg.) R. C. Harris | | Mycoporaceae
|
| MYLA8 | Mycoporum lacteum (Ach.) R. C. Harris | | Mycoporaceae
|
| MYMY3 | Mycoporum mycoporoides (Mull. Arg.) R. C. Harris | | Mycoporaceae
|
| MYOH | Mycoporum ohiense Nyl. ex Fink | Mycoporum compositum | Mycoporaceae
|
| MYPY | Mycoporum pycnocarpoides Mull. Arg. | mycoporum lichen | Mycoporaceae
|
| MYPY2 | Mycoporum pycnocarpum Nyl. | Mycoporum compositum | Mycoporaceae
|
| MYSP6 | Mycoporum sparsellum Nyl. | | Mycoporaceae
|
| MYUN | Mycoporum uniloculatum R. C. Harris | | Mycoporaceae
|
| MYCOP | Mycoporum Flotow ex Nyl. | mycoporum | Mycoporaceae
|
| MYAU | Myelochroa aurulenta (Tuck.) Elix & Hale | | Parmeliaceae
|
| MYGA2 | Myelochroa galbina (Ach.) Elix & Hale | | Parmeliaceae
|
| MYME4 | Myelochroa metarevoluta (Asah.) Elix & Hale | | Parmeliaceae
|
| MYOB2 | Myelochroa obsessa (Ach.) Elix & Hale | | Parmeliaceae
|
| MYELO | Myelochroa (Asah.) Elix & Hale | myelochroa | Parmeliaceae
|
| MYLA6 | Myginda latifolia Sw. | Gyminda latifolia | Celastraceae
|
| MYAN2 | Mylia anomala (Hook.) Gray | | Jungermanniaceae
|
| MYTA | Mylia taylorii (Hook.) Gray | | Jungermanniaceae
|
| MYLIA | Mylia Gray nom. cons. | | Jungermanniaceae
|
| MYLA5 | Myoporum laetum G. Forst. | ngaio tree | Myoporaceae
|
| MYSAS2 | Myoporum sandwicense (A. DC.) Gray ssp. st.-johnii Webster | Myoporum sandwicense | Myoporaceae
|
| MYSAD | Myoporum sandwicense (A. DC.) Gray var. degeneri Webster | Myoporum sandwicense | Myoporaceae
|
| MYSAF | Myoporum sandwicense (A. DC.) Gray var. fauriei (Levl.) Kraenzlin | Myoporum sandwicense | Myoporaceae
|
| MYSAL | Myoporum sandwicense (A. DC.) Gray var. lanaiense Webster | Myoporum sandwicense | Myoporaceae
|
| MYSAS | Myoporum sandwicense (A. DC.) Gray var. stellatum Webster | Myoporum sandwicense | Myoporaceae
|
| MYSA | Myoporum sandwicense (A. DC.) Gray | naio | Myoporaceae
|
| MYOPO | Myoporum Soland. ex G. Forst. | myoporum | Myoporaceae
|
| MYHO4 | Myosotidium hortensia (Decne.) Baill. | giant forget-me-not | Boraginaceae
|
| MYOSO3 | Myosotidium Hook. | giant forget-me-not | Boraginaceae
|
| MYALA2 | Myosotis alpestris F.W. Schmidt ssp. asiatica Vesterg. | Myosotis asiatica | Boraginaceae
|
| MYAL | Myosotis alpestris auct. non F.W. Schmidt | Myosotis asiatica | Boraginaceae
|
| MYAR | Myosotis arvensis (L.) Hill | field forget-me-not | Boraginaceae
|
| MYAS2 | Myosotis asiatica (Vesterg.) Schischkin & Sergievskaja | Asian forget-me-not | Boraginaceae
|
| MYAZ | Myosotis azorica H.C. Wats. ex Hook. | Azores forget-me-not | Boraginaceae
|
| MYDI | Myosotis discolor Pers. | changing forget-me-not | Boraginaceae
|
| MYLA4 | Myosotis latifolia Poir. | broadleaf forget-me-not | Boraginaceae
|
| MYLA | Myosotis laxa Lehm. | bay forget-me-not | Boraginaceae
|
| MYMA8 | Myosotis macrophylla Bieb. | Brunnera macrophylla | Boraginaceae
|
| MYMA | Myosotis macrosperma Engelm. | largeseed forget-me-not | Boraginaceae
|
| MYMI | Myosotis micrantha auct. non Pallas ex Lehm. | Myosotis stricta | Boraginaceae
|
| MYPA2 | Myosotis palustris (L.) Hill | Myosotis scorpioides | Boraginaceae
|
| MYSCA | Myosotis scorpioides L. var. arvensis L. | Myosotis arvensis | Boraginaceae
|
| MYSC | Myosotis scorpioides L. | true forget-me-not | Boraginaceae
|
| MYST2 | Myosotis stricta Link ex Roemer & J.A. Schultes | strict forget-me-not | Boraginaceae
|
| MYSYA | Myosotis sylvatica Ehrh. ex Hoffmann var. alpestris auct. non (F.W. Schmidt) Koch | Myosotis asiatica | Boraginaceae
|
| MYSY | Myosotis sylvatica Ehrh. ex Hoffmann | woodland forget-me-not | Boraginaceae
|
| MYVEM | Myosotis verna Nutt. var. macrosperma (Engelm.) Chapman | Myosotis macrosperma | Boraginaceae
|
| MYVE | Myosotis verna Nutt. | spring forget-me-not | Boraginaceae
|
| MYVE5 | Myosotis versicolor (Pers.) Sm. | Myosotis discolor | Boraginaceae
|
| MYVI | Myosotis virginiana L. | Hackelia virginiana | Boraginaceae
|
| MYVIM | Myosotis virginica (L.) B.S.P. var. macrosperma (Engelm.) Fern. | Myosotis macrosperma | Boraginaceae
|
| MYVI2 | Myosotis virginica auct. non (L.) B.S.P. | Myosotis verna | Boraginaceae
|
| MYOSO | Myosotis L. | forget-me-not | Boraginaceae
|
| MYAQ | Myosoton aquaticum (L.) Moench | giantchickweed | Caryophyllaceae
|
| MYOSO2 | Myosoton Moench | myosoton | Caryophyllaceae
|
| MYAL6 | Myosurus alopecuroides Greene | Myosurus sessilis | Ranunculaceae
|
| MYAPB | Myosurus apetalus C. Gay var. borealis Whittemore | bristly mousetail | Ranunculaceae
|
| MYAPM | Myosurus apetalus C. Gay var. montanus (Campbell) Whitemore | bristly mousetail | Ranunculaceae
|
| MYAP | Myosurus apetalus C. Gay | bristly mousetail | Ranunculaceae
|
| MYARM2 | Myosurus aristatus Benth. ssp. montanus (Campbell) D.E. Stone ex Mason | Myosurus apetalus var. montanus | Ranunculaceae
|
| MYAR3 | Myosurus aristatus auct. non Benth. | Myosurus apetalus var. borealis | Ranunculaceae
|
| MYCL | Myosurus clavicaulis M.E. Peck p.p. | Myosurus minimus | Ranunculaceae
|
| MYCL | Myosurus clavicaulis M.E. Peck p.p. | Myosurus sessilis | Ranunculaceae
|