THE LICHEN FLORA OF THE SANTA CRUZ PENINSULA 97 



asci with 8, rarely 16 spores; these from 3-to multilocular, spindle to 

 needle-shaped, with both ends alike or one end prolonged into a tail, 

 straight, curved, or spiral, without a halo. 



A large genus, of more than 200 species, found all over the world, 

 on stones, bark, wood, moss, etc. 



KEY TO THE SPECIES. 



A. Thallus usually pale yellow, and yellow with KOH; apothecia blue, 



then violet with KOH i. herrei 



A A. Thallus never yellow and not changed by KOH. 



B. On rocks; thallus black with greenish or grayish cast 2. ioessa 



BB. On trees; thallus not blackish. 



C. Apothecia clouded flesh-color and darker; thecium blue with 



I 3- ncegelii 



CC. Apothecia black; thecium not blue with 1 4. akompsa 



i. BACIDIA HERREI A. Zahlbr. 

 Bacidia herrei A. Zahlbruckner, Annales Mycologoci, 6 : 130. 1908. 



Thallus sub-orbiculate, becoming effuse, more or less chinky, of 

 granulose, densely imbricated and crowded, thickish squamules, or 

 thin and reduced to mere granules; without soredia or isidia, but the 

 granules sometimes almost coralloid; usually of a pale yellow color, 

 sometimes whitish, rarely greenish gray; KOH yellow; CaCl 2 2 . 



Apothecia sessile, small to medium, sparsely distributed to approxi- 

 mate, sometimes forming a heap of several together, basally con- 

 stricted, circular, or sub-angulose when crowded; disk plane to con- 

 vex, red, not pruinose; the proper margin thin, concolorous, entire, 

 from prominent finally excluded; with KOH an apothecial section 

 turns an intense deep blue, soon changing to violet, the epithecium 

 losing the blue last; epithecium granular, broad, dark red; hypothe- 

 cium colorless; hymenium more or less reddish, 90 no/* high, 

 bluish with I; paraphyses close together, free, simple, not septate; 

 asci short, oblong-clavate; spores arranged lengthwise in the asci, 

 colorless, needle-like to narrowly spindle-shaped, usually much 

 attenuated at one end, straight to slightly curved, indistinctly pluri- 



2 3 



septate (5 - 8),- /<;''35 ~ W longiset 1.7 - i.8/datis", A. 

 35 ~ 4o 



Zahlbr. 



On sandstone and the bark of Pseudotsuga taxifolia and on dead 

 wood of Pseudotsuga taxifolia andAdenostomafasciculatum, at Devil's 



