| Common Name | Scientific Name | Code |
| n/a | Placynthium stenophyllum (Tuck.) Fink var. isidiatum Henssen | PLSTI |
| n/a | Polychidium contortum Henssen | POCO39 |
| blackthread lichen | Placynthium (Ach.) Gray | PLACY3 |
| blackthread lichen | Placynthium asperellum (Ach.) Trevisan | PLAS60 |
| blackthread lichen | Placynthium flabellosum (Tuck.) Zahlbr. | PLFL3 |
| blackthread lichen | Placynthium nigrum (Hudson) Gray | PLNI60 |
| blackthread lichen | Placynthium stenophyllum (Tuck.) Fink | PLST5 |
| blackthread lichen | Placynthium subradiatum (Nyl.) Arnold | PLSU3 |
| koerberia lichen | Koerberia A. Massal. | KOERB |
| koerberia lichen | Koerberia biformis A. Massal. | KOBI2 |
| Koerberia sonomensis | Pannaria sonomensis Tuck. | PASO4 |
| Leptochidium albociliatum | Leptogium albociliatum Desmaz. | LEAL34 |
| Leptochidium albociliatum | Leptogium pilosellum G. Merr. | LEPI10 |
| Leptochidium albociliatum | Polychidium albociliatum (Desmaz.) Zahlbr. | POAL18 |
| leptochidium lichen | Leptochidium albociliatum (Desmaz.) Choisy | LEAL20 |
| leptochidium lichen | Leptochidium Choisy | LEPTO13 |
| Peters's blackthread lichen | Placynthium petersii (Nyl.) Burnham | PLPE3 |
| Placynthium asperellum | Placynthium aspratile (Ach.) Henssen | PLAS4 |
| Polychidium dendriscum | Leptogidium dendriscum (Nyl.) Nyl. | LEDE20 |
| polychidium lichen | Polychidium (Ach.) Gray | POLYC5 |
| polychidium lichen | Polychidium muscicola (Sw.) Gray | POMU11 |
| Sonoma koerberia lichen | Koerberia sonomensis (Tuck.) Henssen | KOSO2 |
| tree polychidium lichen | Polychidium dendriscum (Nyl.) Henssen | PODE60 |
| Vestergrenopsis isidiata | Pannaria isidiata Degel. | PAIS3 |
| vestergrenopsis lichen | Vestergrenopsis elaeina (Wahlenb.) Gyelnik | VEEL3 |
| vestergrenopsis lichen | Vestergrenopsis Gyelnik | VESTE |
| vestergrenopsis lichen | Vestergrenopsis isidiata (Degel.) E. Dahl | VEIS |