70 PLANTS OF RHODE ISLAND. 



Class V. THALLOPHYT^. 

 OuDEii 110. LICHENES. 



RAMALINA, Ach. 



1. rigida, Pers. On trees. 



2. calicaris, (L.) Fr. 



a. fraxinea, Fr. On trees. 



b. fastigiata, Fr. On trees. 



c. canaliculata, Fr. On trees. 



d. farinacea, Schaer. On rocks and trees. 



3. pollinaria, (Ach.) On rocks. 



4. polymorpha, (Ach.) On rocks. 



CETRARIA. (Ach.) Fries. 



1. Islandica, (L.) Ach. On the ground. 



2. aleurites, (Ach.) Th. Fr. On trees. 



b. placorodia, Tuckerm. On rail fences. 



3. Fendleri, Tuckerm. On rails. 



4. ciliaris, (Ach.) On trees and rail fences. 



5. lacunosa, Ach. On trees and rails. 



6. glauca, (L.) Ach. On rocks and trees. 



7. Oakesiana, Tuckerm. In same places. 



8. juniperina, (L.) Ach. Upon trees. 



E V E R N I A , (Ach. ) Mann. 



1. furfuracea, (L.) Mann. Upon trees. 



2. prunastri, (L.) Ach. On trees and rails. 



USNEA, (Dill.) Ach. 



barbata, (L.) Fr. On trees. 



a. florida, Fr. On trees. 



*hirta, Fr. On trees. 



**rubigenia, Michx. On trees. 



AL ECTOR I A, (Ach.) Nyl. 

 jubata, (L.) b. chalybeiformis, Ach. On dead wood. 

 THBLOSCHISTES, (Norm.) Tuckerm. 



1. chrysophthalmus, (L.) Noim. On trees, &c. 



b. flavicans, Wallr. On trees- 



2. parietinus, (L.) Norm. On trees near salt water. 



3. polycarpus, Ehrb. On old fences. 



4. lychneus, Nyl. On stones. 



5. concolor, Dicks. On stones and trees and old fences. 



PARHELIA, (Ach.)DeNot. 



1. perlata, (L.) Ach. On trees. 



2. perforata, (Jacq.) Ach. On rocks and trees. 



3. cetrata, Ach. On trees and rocks. 



