84 HERRE 



On sandstone in the mountains, at 3000 feet altitude, and also 

 rarely at lower elevations. Occurring in the Oakland Hills (Bo- 

 lander), and probably elsewhere in California. Generally distrib- 

 uted in Europe. 



8. LECIDEA MANNI Tuck. 



Lecidea manni Tuck. Syn. N. Am. Lich. II: 75. 1888. 

 Lecidea manni Hasse, The Bryologist 11:6. 1908. 



Thallus indeterminate, of rather large and conspicuous, thick, 

 convex scales or areoles, from scattered becoming crowded and im- 

 bricate; their surface smooth, with rounded or occasionally crenate 

 or finely toothed edge, often with a gray, dusky, or blackish mar- 

 gin; color buff to yellow brown; the dusky or blackish hypothallus 

 indistinct; KOH+ CaCl 2 2 reddish. 



Apothecia not numerous, innate, sessile, of medium size, circular 

 or irregular, the black disk flat, soon plano-convex or moderately 

 convex; bordered by a paler, erect, rather thick, entire, and sinu- 

 ous margin; hypothecium colorless or slightly brownish; I-; spores 



4.8 -5 "5-7 



ellipsoid, * /*; -~ n" Tuck. 



12 19.5 II 10 



A single specimen collected on felspathic rock, at the summit of 

 Loma Prieta, at an elevation of 3793 feet. A comparison of this 

 with Tuckerman's type specimen shows them to be identical in 

 every respect except the paler color of my specimen. Mt. Diablo, 

 the type locality, is about 7 5 miles north of Loma Prieta, and is 

 the terminal peak of the Inner Coast Range east of San Francisco 

 Bay. The plant has also been found by Dr. Hasse in Ventura 

 County.. (Named for Horace Mann, Jr. who collected lichens in 

 California and the Hawaiian Islands in the '6os.) 



9. LECIDEA ATROLUTESCENS Nyl. 



Lecidea atrolutescens Nyl. in litt., 1896. 



Thallus cartilaginous, indeterminate, composed of convex to 

 sub-globose squamules, from J to 2 mm. wide; fawn-colored or 

 buff, paling toward the margins, often crenulate and lobulate, either 

 scattered or approximate; hypothallus indistinct. 



