herre: lichen flora * 383 



blue with I; asci short, narrowly clavate, in our material usually without well 

 developt spores; these often smaller than given by most authors, 2.8 to 3.5/x wide 

 and 5.8 to 8/x long; in a specimen collected by Bolander in the Yosemite Valley 

 and determined by Tuckerman I find the pruinose apothecia have spores 3.5 to 

 5/x wide by 9 to 11^ long. A lichen of granitic and schistose rocks in alpine and 

 arctic regions. Occurring on Black Mountain, at an altitude of 900 meters. Com- 

 mon in the Sierra Nevada at 2000 meters and above and one of the most suc- 

 cessful of lichens on the highest peaks. On Mt. Hamilton, near San Jose, at 1400 

 meters. Collected in southern California by Dr: Hasse at 1800 meters and above. 

 Abundant in western Nevada. Recorded by Tuckerman from a number of Cali- 

 fornian localities, Mt. Hood, Oregon, the Oregon coast, and from Washington. 

 Found on all high mountains thruout the region west of the Missouri River. 



LECIDEA SILACEA Ach. Lecidea silacea Ach. Meth. Lich. 48. 1803. Lec- 

 idea lapicida Tuck. Synopsis, 2 : 70. 1888. in part. Thallus indeterminate, thin 

 or scanty, the areoles rather thickish, more or less tartareous, ashen gray in our 

 specimens but also glaucous; KOH — ; CaOCl 2 faintly reddish; KOH + CaOCls, 

 red; medulla faint blue with I. Apothecia 0.3 to 1.3 mm. in diameter, closely 

 adnate or sometimes somewhat immersed, numerous, often clustered; from circular 

 becoming irregular by crowding, the flat black disc becoming slightly convex; 

 margin thin, black, elevated, said to finally disappear tho not so in our material; 

 the broad hypothecium black or very dark brown; epithecium greenish umber; 

 thecium more or less greenish, becoming deep blue with I; paraphyses congluti- 

 nate, not very distinct, with enlarged darker tips; asci clavate; spores short 

 ellipsoid, 4 to 6/* broad, and 9 to 12/* long. On sandstone in the Santa Cruz Moun- 

 tains at from 600 meters (Bear Gulch road) to 1000 meters elevation (Castle Rock). 

 Occurring also at Mt. Hamilton at 1400 meters. Undoubtedly the "Glaucous 

 lichen" reported by Tuckerman from the mountains of California. A European 

 lichen occurring also in various parts of North America and in New Zealand. 



LECIDEA GLEBULOSA (E. Fries). Biatora glebulosa E. Fries, Lich. Europ. 

 Reform. 252. 1831. Tuckerman, Synopsis, 2: 16. 1888. Thallus of small, closely 

 appressed scales which vary from crumb-like to lobed and crenate; dispersed, 

 or crowded and forming an irregular uneven crust which is effigurate at the margin 

 when well developt; dull whitish to gray in color. KOH — ; CaCl 2 2 , red. Apo- 

 thecia appressed, large, the flat or slightly convex disk usually black, but varying 

 from reddish or pale flesh color to black; the thick, prominent, paler or whitish 

 margin becoming irregular and finally deeply folded so that the disk is more or 

 less dissected; hypothecium pale brown; spores broadly ellipsoid 5 to 6m broad 

 and 10 to 12/j. long. On sandstone in the foothills near Stanford University, but 

 rarely fertile. In the Oakland Hills it is not rare and is abundantly fertile. Re- 

 corded by Tuckerman from California, Oregon, and Washington. 



LECIDEA ULIGINOSA (Schrad) Ach. Lichen uliginosus Schrader, Spic. Fl. 

 Germ. 88. 1794. Lecidea uliginosus Ach. Meth. Lich. 43. 1803. Biatora uliginosa 

 Tuckerman, Synopsis, 2: 27. 1888. Thallus spreading indefinitely, of minute 

 to microscopic granules which form a very thin and more or less continuous 

 blackish, brown, or dusky crust; no reactions with the usual reagents. Apo- 

 thecia of the same color as the thallus, small to very minute, 0.2 to 0.6 mm. in diam- 

 eter, at first immersed but mostly adnate; with flat disk which is rarely convex; 

 margin thin, elevated, at first pale but soon blackening and disappearing; hypo- 



