2o6 HERRE 



I. CETRARIA CALIFORNICA Tuck. 



Cetraria californica Tuck. Am. Journ. Sci. 28: 203. 1859. 



Cetraria californica Tuck. Syn. N. Am. Lich. 1 : 29. 1882. 



Cetraria californica Herre, Proc. Wash. Acad. Sci. 7: 337. 1906. 



Thallus tufted, fruticose, erect; lobes spreading, flattened or linear, 

 much branched, their tips finely dissected; color black or very dark 

 green; occasionally brownish green or dusky; color always dull; 

 beneath paler, usually oHve-green or brown, but varying greatly; 

 finally white with a tinge of greenish. 



Apothecia terminal, concolorous and dull, but sometimes shining 



and darker than the thallus; margin- toothed or fringed, sometimes 



3 — 5 

 almost smooth; spores ellipsoid, 7 Z^- 



On fences, shrubs, and twigs of trees. Found everywhere, from 

 the salt marshes about San Francisco Bay to the highest elevation 

 in the peninsula. 



Found only in the western United States and British Columbia, 

 from the Sierra Nevada Mountains to the Pacific. Originally on 

 various coniferae and evergreen shrubs, but migrant to fences. 



2. CETRARIA JUNIPERINA (L.) Ach. 



Lichen juniperinus L,mne, Sp. Plant. 2: 1147. 1753- 

 Cetraria juniperina Ach. Meth. Lich. 298. 1803. 

 Cetraria juniperina Tuck. Syn. N.Am. Lich. I: 37, 1882. 

 Cetraria juniperina Herre, Proc. Wash. Acad. Sci. 7: 340. 1906. 



Thallus foliaceous, membranaceous and expanded, or else tufted, 

 irregularly cut-lobed and ascendant; lobes crowded, edges erose 

 and crenate. Color bright yellow, alike on both sides; sometimes 

 the yellow is tinged with greenish. 



Apothecia submarginal, the disk chestnut; margin crenulate or 



3.5 —4.9 

 tuberculate; spores ellipsoid, ,- _ ^ P- 



Abundant on twigs, limbs, and cones of Pinus attenuata, in the 

 "chalk hills" on the western border of the Big Basin, at an alti- 

 titude of 1500 feet and above; common also on Pinus radiata, which 

 is found along the sea coast from Point Ano Nuevo to Monterey 

 and southward. 



