PLANTS OF RHODE ISLAND. 73 
Oop go 
subfusca, (L.) Ach. On rocks and fences and trees. 
e. distans, Ach. On rocks and trees. 
atra, (Huds.) Ach. On rocks and trees. 
varia, (Ehrh.) Nyl. On trees and fences and stones. 
d. symmicta, Ach. In similar places. 
e. seepincola, Fr. In similar places. 
elatina, Ach. On dead trees. 
pallescens, (L.) Schaerer. On dead wood and rocks. 
tartarea, (L.) Ach. On ground and stones. 
cinerea, (L.) Sommerf. On rocks. 
c. gibbosa, Nyl. On rocks and fences. 
cervina, (Pers.) Nyl. On rocks. 
fuscata, (Schrad.) Th. Fr. On rocks. 
b. fuscescens, Th. Fr. On rocks. 
privigna, (Ach.) Nyl. On rocks. 
b. pruinosa, Auctt. On rocks. 
ce. Clavus, Koerb. On rocks. 
RINODINA, Mass., Tuckerm. 
oreina, (Ach.) Mass. On rocks. 
sophodes, (Ach.) Nyl. On rocks and fences. 
b. atrocinerea, Nyl. On rocks. 
d. confragosa, Nyl. On rocks and trees. 
e. exigua, Fr. On rocks and fences and trees. 
constans, (Nyl.) Tuckerm. On trees and fences. 
PERTUSARIA, D.C. 
velata, (Turn.) Nyl. On rocks and trees. 
multipuncta, (Turn.) Nyl. On trees. 
communis, D. C. On rocks and trees. 
pustulata, (Ach.) Nyl. On trees. 
leioplaca, (Ach.) Schaer. On rocks and trees. 
Wiulfenii, D. C. On trees. 
CONOTREMA, Tuckerm. 
urceolatum, (Ach.) Tuckerm. On trees. 
GYALECTA, (Ach.) Anzi. 
Pineti, (Schrad.) Tuckerm. On bark of pine trees. 
URCEOLARIA, (Ach.) Flot. 
scruposa, Nyl. On ground. 
var. gpysacea, Nyl. On earth and mosses and 
lichens. 
var. parasitica, Nyl. On Cladonia. 
MYRIANGIUM, Mont. & Berk. 
Dureii, Mont. & Berk. On bark of Walnut trees. 
