PLANTS OF RHODE ISLAND. 71 



4. crinita, Ach. On rocks and trees. 



5. tiliacea, (Hoffm.) Floerke. On rocks and trees. 



6. Borreri, Turn. On trees and fences^and stones. 



b. rudecta, Tuckerm. In same situation. 



7. saxatilis, (L.) Fr. On rocks and fences and trees. 



8. physodes, (L.) Ach. In similar position. 



9. pertusa, (Schrank.) Schaer. On rocks and trees. 



10. colpodes, (Acli.) Nyl. On trees. 



11. olivacea, (L.) Ach. On rocks and trees. 



12. caperata, (L.) Ach. On rocks and trees and dead wood. 



13. conspera, (Ehrb.) Ach. In same places. 



PHYSCIA, (D. C.) Th. Fr. 



1. speciosa, (Ach.) Nyl. On rocks and trees. 



2. hypoleuca, (Muhl.) Tuckerm. On trees. 



3. aquila, (Ach.) Xyl. b. detonsa, Tuckerm. On rocks gen- 



erally. 



4. pulverulenta, (Schreb.) Nyl. On the ground and on rocks. 



5. stellaris, (L.) On rocks and trees and fences. 



6. astroidea, (Fr.) Nyl. On trees. 



7. tribacia, (Ach.) Tuckerm. On rocks. 



8. csesia, (Hoffm.) Nyl. On stones. 



9. obscura, (Ehrb. ) Nyl. On dead wood generally. 



*endochrysa, Nyl. On rocks and trees. 



10. adglutinata, (Floerke.) Nyl. On small trees and bushes. 



PYXINE, Fr. 



1. Frostii, Tuckerm. On rocks. 



2. sorediata, Fr. On rocks. 



UMBILICARIA, Hoffm. 



1. Muhlenbergii, (Ach.) Tuckerm. On rocks. 



2. Dillenii, Tuckerm. On rocks. 



3. Pennsylvanica, Hoffm. On rocks. 



4. pustulata, L. On rocks. 



b. papulosa, Tuckerm. On rocks. 



STICTA, (Schreb.) Fr. 



1. amplissima, (Scop.) Mass. On stumps and rocks. 



2. aurata, (Sm.) Ach. On ground, &c. 



3. pulmonaria, (L.) Ach. On rocks and trees. 



4. quercizans, (Michx.) Ach. ? On trees. 



5. crocata, (L.) Ach. On stumps, &c. 



6. scrobiculata, (Scop.) Ach. Without fruit, on rocks. 



NEPHROMA, Ach. 



1. tomentosum, (Hoffm.) Koerb. On rocks and trees. 



2. laevigatum, Ach. On rocks and trees. 



