PLANTS OF IOWA 97 



1199. P. crinita, Ach. 



Trees and rocks; common. 



1200. P. tiliacea, (Hoffm.) Floerk. 

 Trees and rocks; infrequent. 



1201. P. lorreri, Turn. 

 Trees; frequent. 



1202. P. ~borreri, Turn., var. rudecta, Tuck. 

 Trees. 



1203. P. saxatilis, (L.) Fr. 

 Trees and rocks. 



1204. P. saxatilis, L. Fr. var. sulcata, Nyl. 

 On trees, rare. 



1205. P. olivacea, (L.) Ach. 

 Trees. 



1206. P. olivacea, L. Ach., var. aspinota, Ach. 

 On trees, infrequent. 



1207. P. caper ata, (L.) Ach. 

 Trees and rocks. 



1208. P. conspersa, (Ehrh.) Ach. 

 Rocks. Rare. 



PHYSCIA, (DC., Fr.) Th. Fr. 



1209. P. speciosa, (Wulf., Ach.) Nyl. 

 Trees and mossy rocks. 



1210. P. liypoleuca, (Muhl.) Tuck." 

 Trees, frequent. 



1211. P. granulifera, (Ach.) Tuck. 

 Trees. Common. 



1212. P. comosa, (Eschw.) Nyl. 

 Red Cedar, along bluffs. 



1213. P. aqutia, (Ach.) Nyl. 



Rocks. Probably the variety detonsa occurs. 



1214. P. pulverulent a, (Schreb.) Nyl. 

 Trees and rocks. 



1215. P, stellaris, L. 



Trees and rocks; common. 



1216. P. tribacia, (Ach.) Tuck. 



