106 EEYTHEA. 



rium of the University of California, from Sandberg, collected 

 in "deep ravines, Thomson, Minn." appear to differ likewise, 

 in the relative length of the lateral and median lobes. The 

 color of the tuft of hairs on the latter, in the Minnesota 

 plants is bright yellow, while in those collected by Dr. 

 Kellogg in Mendocino Co. (in herb. Univ. Calif.), and in 

 mine, these hairs are merely white, with no trace of yellow, 

 and appear moreover, to be longer, though sparser, than in 

 the Minnesota plants. 



LICHENS OF THE VICINITY OF LOS 

 ANGELES.— III. 



By Db. H. E. Hasse. 



Usnea barbata (L.) Fr., var. hiria, Fr. On twigs. Infer- 

 tile. 



Theloschistes parietinus (L.) Norm., forma ierrestris. On 

 moist coast rocks. 



Parmelia conspersa (Ehrh.) Ach. On ground and rocks. 

 Common. 



Physcia stellaris (L.) var. aipoUa, Nyl. On rocks. Com- 

 mon. 



Endocarpiscum Guepini (Delis.) Nyl. On earth. 

 Placodium murorum (Hoffm.) DC. On rocks. 

 P. murorum (Hoffm.) DC, var. gyalolechioides, Muell. 

 On moist coast rocks. 



P. aurantiacum (Lightf.) Naeg. & Hepp. On Quercus, 

 etc. Not rare. 



P.ferrugineum (Huds.) Hepp. On various shrubs. 

 Lecanora muralis (Schreb.) Schser. On rocks. 

 L. pallida (Schreb.) Schaer., var. cancriformis, Tuckerm. 

 Frequent, on Heteromeles and other shrubs. 



