| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| ACGL3 | Acarospora glebosa (Flotow) Korber | Acarospora oligospora | Acarosporaceae
|
| ACHA3 | Acarospora hassei Herre | Hasse's cracked lichen | Acarosporaceae
|
| ACHE6 | Acarospora heppii (Nageli ex Hepp) Nageli ex Korber | Hepp's cracked lichen | Acarosporaceae
|
| ACHE7 | Acarospora heufleriana Korber | Heufler's cracked lichen | Acarosporaceae
|
| ACHI6 | Acarospora hilaris (Dufour) Hue | cracked lichen | Acarosporaceae
|
| ACIM2 | Acarospora immersa Fink | water cracked lichen | Acarosporaceae
|
| ACIM3 | Acarospora impressula Th. Fr. | cracked lichen | Acarosporaceae
|
| ACIN9 | Acarospora incertula H. Magn. | Pleopsidium chlorophanum | Acarosporaceae
|
| ACIN5 | Acarospora instrata H. Magn. | cracked lichen | Acarosporaceae
|
| ACIN10 | Acarospora intercedens H. Magn. | Acarospora schleicheri | Acarosporaceae
|
| ACIN6 | Acarospora interjecta H. Magn. | cracked lichen | Acarosporaceae
|
| ACIN7 | Acarospora interposita H. Magn. | cracked lichen | Acarosporaceae
|
| ACIN8 | Acarospora interspersa H. Magn. | cracked lichen | Acarosporaceae
|
| ACLA7 | Acarospora lapponica (Ach. ex Schaerer) Th. Fr. | Polysporina lapponica | Acarosporaceae
|
| ACMA10 | Acarospora macrospora (Hepp) Bagl. | big spore cracked lichen | Acarosporaceae
|
| ACMO6 | Acarospora molybdina (Wahlenb.) Trevisan | molybdenum cracked lichen | Acarosporaceae
|
| ACMO7 | Acarospora montana H. Magn. | Acarospora rugulosa | Acarosporaceae
|
| ACNE7 | Acarospora nevadensis H. Magn. | Nevada cracked lichen | Acarosporaceae
|
| ACNI6 | Acarospora nigromarginata de Lesd. | darkmargin cracked lichen | Acarosporaceae
|
| ACNI7 | Acarospora nitida H. Magn. | cracked lichen | Acarosporaceae
|
| ACNON | Acarospora nodulosa (Dufour) Hue var. nodulosa | nodule cracked lichen | Acarosporaceae
|
| ACNOR | Acarospora nodulosa Dufour) Hue var. reagens Zahlbr. | Acarospora reagens | Acarosporaceae
|
| ACNO6 | Acarospora nodulosa (Dufour) Hue | nodule cracked lichen | Acarosporaceae
|
| ACNO3 | Acarospora novomexicana H. Magn. | Pleopsidium chlorophanum | Acarosporaceae
|
| ACOB4 | Acarospora obnubila H. Magn. | cracked lichen | Acarosporaceae
|
| ACOB5 | Acarospora obpallens H. Magn. | cracked lichen | Acarosporaceae
|
| ACOB6 | Acarospora obscura H. Magn. | Acarospora complanata | Acarosporaceae
|
| ACOC2 | Acarospora ocellata H. Magn. | Acarospora schleicheri | Acarosporaceae
|
| ACOL | Acarospora oligospora (Nyl.) Arnold | cracked lichen | Acarosporaceae
|
| ACOX2 | Acarospora oxytona (Ach.) A. Massal. | Pleopsidium flavum | Acarosporaceae
|
| ACPA7 | Acarospora particularis H. Magn. | particular cracked lichen | Acarosporaceae
|
| ACPE6 | Acarospora peliscypha Th. Fr. | cracked lichen | Acarosporaceae
|
| ACPE7 | Acarospora peltastica Zahlbr. | cracked lichen | Acarosporaceae
|
| ACPY2 | Acarospora pyrenopsoides H. Magn. | cracked lichen | Acarosporaceae
|
| ACRA4 | Acarospora radicata H. Magn. | cracked lichen | Acarosporaceae
|
| ACRE7 | Acarospora reagens Zahlbr. | cracked lichen | Acarosporaceae
|
| ACRH2 | Acarospora rhabarbarina Hue | Acarospora schleicheri | Acarosporaceae
|
| ACRI5 | Acarospora rimulosa H. Magn. | Acarospora schleicheri | Acarosporaceae
|
| ACRU6 | Acarospora rubicunda H. Magn. | Acarospora schleicheri | Acarosporaceae
|
| ACRU7 | Acarospora rufescens (Ach.) Bausch | Acarospora smaragdula | Acarosporaceae
|
| ACRU5 | Acarospora rugulosa Korber | cracked lichen | Acarosporaceae
|
| ACSA6 | Acarospora saepincola H. Magn. | cracked lichen | Acarosporaceae
|
| ACSA7 | Acarospora saxicola Fink | Glypholecia scabra | Acarosporaceae
|
| ACSC7 | Acarospora scabra (Pers.) Th. Fr. | Glypholecia scabra | Acarosporaceae
|
| ACSC4 | Acarospora scabrida Hedl. ex H. Magn. | cracked lichen | Acarosporaceae
|
| ACSC5 | Acarospora schleicheri (Ach.) A. Massal. | Schleicher's cracked lichen | Acarosporaceae
|
| ACSC6 | Acarospora scotica Hue | cracked lichen | Acarosporaceae
|
| ACSI4 | Acarospora sinopica (Wahlenb.) Korber | cracked lichen | Acarosporaceae
|
| ACSM2 | Acarospora smaragdula (Wahlenb.) A. Massal. | cracked lichen | Acarosporaceae
|
| ACSO2 | Acarospora socialis H. Magn. | cracked lichen | Acarosporaceae
|
| ACSP6 | Acarospora sparsa H. Magn. | cracked lichen | Acarosporaceae
|
| ACSQ2 | Acarospora squamulosa (Schrader) Trevisan | Acarospora fuscata | Acarosporaceae
|
| ACSQ | Acarospora squamulosa sensu Th. Fr. | Acarospora macrospora | Acarosporaceae
|
| ACST2 | Acarospora stapfiana (Mull. Arg.) Hue | cracked lichen | Acarosporaceae
|
| ACST4 | Acarospora stenospora (Stizenb.) Hue | Lecanora stenospora | Lecanoraceae
|
| ACST3 | Acarospora strigata (Nyl.) Jatta | cracked lichen | Acarosporaceae
|
| ACSU7 | Acarospora subalbida H. Magn. | Acarospora schleicheri | Acarosporaceae
|
| ACSU8 | Acarospora subcontigua H. Magn. | Acarospora schleicheri | Acarosporaceae
|
| ACSU4 | Acarospora subfuscescens (Nyl.) H. Magn. | Polysporina lapponica | Acarosporaceae
|
| ACSU5 | Acarospora succedens H. Magn. | cracked lichen | Acarosporaceae
|
| ACSU6 | Acarospora superfusa H. Magn. | cracked lichen | Acarosporaceae
|
| ACTE5 | Acarospora tenebrica H. Magn. | cracked lichen | Acarosporaceae
|
| ACTE6 | Acarospora terricola H. Magn. | cracked lichen | Acarosporaceae
|
| ACTE7 | Acarospora texana H. Magn. | Pleopsidium chlorophanum | Acarosporaceae
|
| ACTH4 | Acarospora thamnina (Tuck.) Herre | cracked lichen | Acarosporaceae
|
| ACTH5 | Acarospora thelococcoides (Nyl.) Zahlbr. | cracked lichen | Acarosporaceae
|
| ACTH6 | Acarospora thermophila Herre | heatloving cracked lichen | Acarosporaceae
|
| ACTO4 | Acarospora tongleti Hue | Tonglet's cracked lichen | Acarosporaceae
|
| ACTU2 | Acarospora tucsonensis H. Magn. | Tucson cracked lichen | Acarosporaceae
|
| ACUT | Acarospora utahensis H. Magn. | Utah cracked lichen | Acarosporaceae
|
| ACVA3 | Acarospora variegata H. Magn. | Acarospora tongleti | Acarosporaceae
|
| ACVE4 | Acarospora veronensis A. Massal. | cracked lichen | Acarosporaceae
|
| ACWA2 | Acarospora washingtonensis H. Magn. | Washington cracked lichen | Acarosporaceae
|
| ACWE2 | Acarospora weldensis H. Magn. | Pleopsidium chlorophanum | Acarosporaceae
|
| ACXA2 | Acarospora xanthophana (Nyl.) Jatta | Acarospora schleicheri | Acarosporaceae
|
| ACARO2 | Acarospora A. Massal. | cracked lichen | Acarosporaceae
|
| ACME5 | Acaulon megalosporum Grout | Lorentziella imbricata | Gigaspermaceae
|
| ACMUM | Acaulon muticum (Hedw.) C. M�ll. var. muticum (Jaeg.) Crum | acaulon moss | Pottiaceae
|
| ACMUR | Acaulon muticum (Hedw.) C. M�ll. var. rufescens (Jaeg.) Crum | acaulon moss | Pottiaceae
|
| ACMU5 | Acaulon muticum (Hedw.) C. M�ll. | acaulon moss | Pottiaceae
|
| ACRU8 | Acaulon rubrum Grout | Acaulon muticum var. muticum | Pottiaceae
|
| ACRU9 | Acaulon rufescens Jaeg | Acaulon muticum var. rufescens | Pottiaceae
|
| ACRU10 | Acaulon runyoni Grout | Lorentziella imbricata | Gigaspermaceae
|
| ACSC8 | Acaulon schimperianum (Sull.) Sull. in Sull. & Lesq. | Schimper's acaulon moss | Pottiaceae
|
| ACTR4 | Acaulon triquetrum (Spruce) C. M�ll. | acaulon moss | Pottiaceae
|
| ACAUL | Acaulon C. M�ll. | acaulon moss | Pottiaceae
|
| ACBAL | Acer barbatum Michx. var. longii (Fern.) Fern. | Acer barbatum | Aceraceae
|
| ACBAV | Acer barbatum Michx. var. villipes (Rehd.) Ashe | Acer barbatum | Aceraceae
|
| ACBA3 | Acer barbatum Michx. | southern sugar maple | Aceraceae
|
| ACBR | Acer brachypterum Woot. & Standl. | Acer grandidentatum var. sinuosum | Aceraceae
|
| ACCA5 | Acer campestre L. | hedge maple | Aceraceae
|
| ACCA9 | Acer carolinianum Walt. | Acer rubrum var. trilobum | Aceraceae
|
| ACCI | Acer circinatum Pursh | vine maple | Aceraceae
|
| ACCI5 | Acer cissifolium (Siebold & Zucc.) K.Koch | ivyleaf maple | Aceraceae
|
| ACDA2 | Acer dasycarpum Ehrh. | Acer saccharinum | Aceraceae
|
| ACDI | Acer diffusum Greene | Acer glabrum var. diffusum | Aceraceae
|
| ACDO | Acer douglasii Hook. | Acer glabrum var. douglasii | Aceraceae
|
| ACDR | Acer drummondii Hook. & Arn. ex Nutt. | Acer rubrum var. drummondii | Aceraceae
|
| ACFLL | Acer floridanum (Chapman) Pax var. longii Fern. | Acer barbatum | Aceraceae
|
| ACFLV | Acer floridanum (Chapman) Pax var. villipes Rehd. | Acer barbatum | Aceraceae
|
| ACFL | Acer floridanum (Chapman) Pax | Acer barbatum | Aceraceae
|