-85- 



similar situations throughout the Inner Coast Range. Type in the author's 

 herbarium. 



LeCANIA ERYSIBE (Ach.) 



Lichen erysihe Ach. Lich. Suec. Prodr. 50. 1798. 



Thallus crustose, effuse, thin and of crumb-like granules, or of thick, frag- 

 ile, deeply fissured areoles, with minutely and imbricately lobulate surface, the 

 lobules with crenate margin, sandy-brown and olivaceous; no chemical reac- 

 tions. Apothecia minute or very small, .3 to i mm. in diameter, closely adnate, 

 the flat disk dark red-brown or blackening, margin rather thick, entire, pale, 

 sometimes disappearing; hypothecium colorless; thecium pale below, becom- 

 ing brownish or reddish above, blue with I, finally turning to greenish; paraphy- 

 ses thick, more or less jointed or septate, their tips slightly enlarged, colorless 

 or darkened; asci short, clavate; spores ellipsoid, simple or imperfectly 2-celled, 

 4 to ,S.5ai broad, and icq to 14/i long. 



Rare; on sandstone in the Oakland Hills, altitude about 400 meters. 

 Legania shastensis Herre, sp. nov. 



Thallus thin, effuse, of thin or thickly scattered, small, crumb-like granules, 

 ashen gray to dusky; KOH yellowish; CaCl^O^. Apothecia numerous, very 

 small to minute, .3 to .8 mm. in diameter, circular, adnate, the flat to slightly 

 convex disk pale yellow to reddish, much like that of Caloplaca gilva, thalline 

 margin paler, entire, thin, often disappearing; very small apotheica often have 

 a thicker whitish margin, with darker, pruinose disk; hypothecium broad, col- 

 orless; thecium deep blue with I; paraphyses simple, not septate, thread-like, 

 subcoherent, their apices not thickened; asci club-shaped to sub-cylindrical, 

 small, 8-1 lAt broad by 36-44^11 long; spores 6 (?) and 8, small, usually bowed 

 but also straight, 4-celled, 3.5 to 5.5^ broad and 11 to 14^ long. 



The few specimens known were collected on the bark of Aesculus at Still- 

 water, Shasta county. This deceptive lichen resembles Caloplaca gilva extern- 

 ally and is very puzzling in section. The thallus is blackened by a Scytonema, 

 and the alga of the lichen is apparently a Nostoc, large colonies of which are 

 parasitic within the thallus, while of course Scytonema filaments are scattered 

 everywhere. It therefore requires very careful study to demonstrate that the 

 real alga of the lichen is not one of the Cyanophyceae. 



Type in author's herbarium; cotypes in the herbarium of the University 

 of California and of Dr. H. E. Hasse. 



Parhelia olivaria (Ach.) Hue, Lich. Ex. Eur. 195. 1803. 



Parmelia perlata B. olivaria Ach. Meth. Lich. 217. 1803. 



Thallus more or less orbiculate and dilated, small to medium size, rather 

 loosely attached, the surface smooth, gray-green, lobes rather short, crisp, with 

 flexuous, crenate margin, their thickened tips strongly upward curved, and 

 inward and white sorediate, under surface black with Httle or no brown mar- 

 gin, minutely wrinkled, naked or with scattered patches of stout black fibrils; 

 KOH yellow, the medulla not affected; surface not affected by CaCl202 but the 

 medulla tinged red; ours sterile. 



