pS HERRE 



Canon, altitude 2300 feet, Castle Rock, 3000 feet, and Grizzly Peak, 

 2700 feet. Probably found all along the summit of the range in 

 similar localities. 



The above description somewhat altered from Dr. Zahlbruckner's 

 excellent diagnosis. While the specimen he described was found on 

 dead Adenostoma, I regard the typical plant to be the one with yel- 

 low, orbiculate, thickish thallus, growing on sandstone. 



A handsome, conspicuous, but not very abundant plant. 



Strongly characterized by the color of the thallus and apothecia, as 

 well as by the beautiful apothecial reactions with KOH. 



2. BACIDIA lOESSA Herre, new species. 



Thallus effuse, thin, of scattered, minute to small, thick, rounded 

 or sub-globose, sometimes sub-pHcate or difiform granules or crumb- 

 like squamules, which are occasionally aggregate; on a thick, promi- 

 nent, often scurfy hypo thallus; color black with a greenish or grayish 

 cast; dark olive-green when wet; KOH — : CaC]202 — . 



Apothecia numerous, small, sessile, black; the flat disk bordered 

 by a small, entire, sometimes paler margin, but soon becoming con- 

 vex, when the margin is excluded finally; epithecium blackish, with 

 KOH becoming purplish or rosy violet, the color suffusing the the- 

 cium; the latter blue with I; paraphyses free, thread-like, rather lax, 

 with sub-globose tips which are violaceous dusky to blackish ; hypo- 

 thecium colorless to pale brownish; asci subcylindrical to clavate 



10 — 15 



/<; spores 4 — locular, spindle-, finger-, and sickle-shaped, 



3-5-6 



14 . 5 — 20 



On igneous rocks on a dry liill side. Hidden Villa Canon, at an alti- 

 tude of 800 feet, and probably in similar situations all through the 

 foothills. The specimens scanty; apparently close to Tuckerman's 

 Bialora arlyla, Synopsis, 11: 37, but I cannot bring the two together. 

 {ioessa, from coeoaa violet colored, from the epithecial reaction with 

 KOH.) 



