PLANTS OF RHODE ISLAND. 75 



BUELLIA, (DeNot.) Tuckerm. 



1. atro-alba, (Fl.) Th. Fr. On granite rocks. 



2. paraseema, (Ach.) Kbr. On trees. 



3. myriocarpa, (D. C.) Mudd. On rocks? 



4. petraea, (Fl.) Tuckerm. On rocks? 



5. geographica, (L.) Tuckei-m. On rocks. 



OPEGRAPHA, Humb. 

 varia, (Pers.) Fr. On trees and dead wood. 



GR APHIS, (Ach.)Nyl. 



SCripta, (L.) Sch. On trees, 



var. limitata, Scbaer. On trees, 



var. recta, Scbaer. On trees, 



var. serpentina, Scbaer. On trees. 



ARTHONIA, Acb.,Nyl. 

 pyrrhula, Nyl. On bark of trees. 



A C O L I U M , Fee., DeNot. 

 tigillare, (Acb.) On old fences and rails. 



CALICIUM, (Pers.)Fr. 



1. trichiale, Acb. On bark of trees. 



2. lenticulare, (Hoffm.) Acb. On dead wood. 



3. trachelinum, Acb. On trees and dead wood. 



4. turbinattim, Pers. On Pertusaria, 



ENDOCARPON, Hedw., Fr. 



miniatum, (L.) Scbaer. On rocks, 



var. complicatum, Scbaer. On rocks, 



var. aquaticum, Scbaer. On rocks. 



VERRUCARIA, (Pers.) Tuckerm. 



1. nigrescens, Pers. On rocks. 



2. muralis, Acb. On rocks. 



PYRENULA, (Acb.) Naegr. & Hoppe. 



1. gemmata, (Acb.) Nyl. On trees. 



2. nitida, Acb. On trees. 



