Lichens of Santa Cruz Peninsula 343 



cc. Soredia more or less abundant 2. hirta^ 343* 



bb. Color rusty red 3. i-nbiginea^ 343. 



aa. Plants more or less pendulous. 



d. Suberect or short-pendulous 4. ccratina^ 344' 



dd. Pendulous, tangled, long to very long. 



e. Fibrils numerous. 



f. Thickly set with short spreading fibrils ...5. dasypoga^ 344- 

 ff. Fibrils nearly straight, horizontal 7. longissiina^ 345* 



ee. Fibrils very few or wanting. 



g. Without spreading fibrils ,6. plicata^ 344- 



gg. Smooth or with very few fibrils; plant stout and coarse. 



8. californica^ 345- 



1. USNEA FLORIDA (L.) Ach. 



Thallus terete, tufted, erect, stout, rather rigid, shrub-like, 

 spreading-branched, beset with stiff, straight fibrils ; epidermis 

 smooth or more or less roughened with minute papillae or tuber- 

 cles ; color gray-green. Apothecia medium to very large, 

 numerous, terminal; color a pale tan, very pale flesh-color, or 

 sometimes whitish. 



On trees and fences throughout. Dwarfed and usually 

 sterile near sea-level ; larger and fruiting profusely above 1000 

 feet. 



Lichen jloridiisl^. Sp. PI. 2: 1154. i753- 

 Usnea jlorida Ach. Meth. Lich. 307. 1803. 



2. USNEA HIRTA (L.) Hoffm. 



Thallus small, tufted, shrub-like, erect, rigid ; branches wide- 

 spread, curving, thickly clad with short fibrils ; the whole plant 

 densely beset with soredia. Apothecia small, rare. 



On trees and fences throughout, but most frequent in the foot- 

 hills at moderate elevations. 

 Lichen hirtus L. Sp. PI. 2 : 1155. i753- 

 Usnea hirta Hoffm. Deutsch. Fl. 2 : 133. 1795* 



3. USNEA RUBIGINEA (Michx.). 



Thallus much like that of Usnea hirta; epidermis smooth to 

 papillate-scabrous ; color varies from bright to dark rusty red 

 or brick-red. Apothecia (not seen) concolorous. 



A few insignificant specimens found near the head of Alpine 



