Field Key to Yellow-green Foliose Lichens
1 Lobes narrow (1-3 mm wide); found on acidic rocks Xanthoparmelia plittii and X. conspersa
![](https://ohiomosslichen.org/wp-content/uploads/2021/10/species-Xanthoparmelia-plittii-1-1000x750.jpg)
Xanthoparmelia plitii
![](https://ohiomosslichen.org/wp-content/uploads/2021/10/XANTPLIT-11Aug13-Shawnee-1000x667.jpg)
Xanthoparmelia plitii thallus lobes
![](https://ohiomosslichen.org/wp-content/uploads/2021/10/XANTPLIN-isidia-from-Shawnee-11Sep13-1000x667.jpg)
Xanthoparmelia plitii isidia
– Thallus lobes relatively broad (3-10 mm wide); substrate various …………………………. 2
2 Thallus isidiate; found on rock…………………………………….. Flavoparmelia baltimorensis
![](https://ohiomosslichen.org/wp-content/uploads/2021/10/FLAVBALT-lobes-29Sep13-Beaver-Cl-Columbiana-Cty-OH-1000x667.jpg)
Flavoparmelia baltimorensis lobes
![](https://ohiomosslichen.org/wp-content/uploads/2021/10/FLAVBALT-24Jun20-Shallenberger-on-ss-ledge-1000x750.jpg)
Flavoparmelia baltimorensis thallus with isidia
– Thallus sorediate; occurence most often on trees………………………………………………….. 3
3 Soredia powdery, massed along upturned margins in thick lip-ahaped soralia; thallus lobes smooth above………………………………………………………………………………. Flavoparmelia soredica
![](https://ohiomosslichen.org/wp-content/uploads/2021/10/FALVSORE-that-rest-are-16Oct21-1000x750.jpg)
Flavoparmelia soredica lobes
![](https://ohiomosslichen.org/wp-content/uploads/2021/10/FLAVSORE-soralia-16Oct21-Richfield-Rest-Area-Summit-Cty-1000x750.jpg)
Flavoparmelia soredica soralia
– Soredia granular, scattered across or concentrated in patches on the upper surface; lobes often wrinkled above………………………………………………………………………………. Flavoparmelia caperata
![](https://ohiomosslichen.org/wp-content/uploads/2021/10/FLAVCAPE-13Feb20-Holmsviulle-Killbuck-1000x750.jpg)
Flavoparmelia caperata thallus
![](https://ohiomosslichen.org/wp-content/uploads/2021/10/FLAVCAPE-soredia-16Oct21-Rest-Area-Rte-271-Summit-1000x750.jpg)
Flavoparmelia caperata soredia