238 HERRE 



the foggy, wind-swept summit of San Bruno mountain, at an altitude 

 of about 1300 feet; here it is sometimes paler basally, or, when 

 shaded, is greenish. 



Abundant in the coast ranges from San Luis Obispo County south- 

 ward, on the twigs of various trees and shrubs; here the lichen is 

 darker colored, usually lacks soredia, and the apothecia are numer- 

 ous. A wide-spread tropical or sub-tropical lichen of maritime 

 regions. 



2. THELOSCHISTES CHRYSOPHTHALMUS (L.) Th. Fr. 



Lichen chrysophthalmus Linne, Mantissa, 2: 311. 1771. 

 Theloschistes chrysophthalmus Th. Fries, Gen. Heterol. Europ. 51. 



1861. 

 Theloschistes chrysophthalmus Tuck. Syn. N. Am. Lich. I: 48. 1882. 



Thallus small, rigid, somewhat erect, much compressed, divari- 

 cately lobed, the multifid tips becoming more or less beset with 

 fibrillose or spinose branches; yellow or yellowish white; beneath 

 whitish; smooth. 



Apothecia medium to large, with orange disk, the margin with 

 radiate fibrils; spores polar-bilocular, the cells often connected by a 



6- 7 

 faint tube, ^ _ p. 



On Quercus agrifolia at Santa Cruz. Rare in the Santa Cruz 

 peninsula, the herbarium specimens I have seen under this name 

 from this region being all Xanthoria lychneus laciniosa. 



A common lichen in some parts of the state and widely distributed 

 in general. 



BUELLIACE^E. 



Thallus crustaceous to squamulose, uniform or marginally lobed, 

 without rhizoids, usually without cortex; alga Protococcus. 



Apothecia circular, innate or sessile, with only a proper margin or 

 with a thalline margin; paraphyses simple; asci with 8 spores, rarely 

 with 16-24 spores; these smoky gray to brown, 2 4 locular, or also 

 muriform, usually with very thick walls. 



KEY TO GENERA. 



Apothecia lecideine LXI. Buellia 



Apothecia lecanorine LXII. Rinodina 



