THE LICHEN FLORA OF THE SANTA CRUZ PENINSULA 1 33 



Thallus uniform crustaceous to coralloid or fruticose, attached by 

 the hyphae of the medulla. Apothecia innate or sessile, lecanorine, 

 the proper margin distinct or obsolete; spores simple. 



About 40 species, living on rocks, but one found with us. 



i. PYRENOPSIS PILEOCOCCA Tuck. 



Synalissa phceococca Tuck. Gen. Lich. 80. 1872. 



Pyrenopsis phceococca Tuck. Syn. N. Am. Lich. I: 136. 1882. 



Thallus effuse, thin, of minute coralloid-granulose, distinct or areo- 

 late crumbs, which may pass into a thicker, broken crust; color a 

 dark reddish brown. 



Apothecia scattered, rather numerous, from very small becoming 

 moderate in size, the disk concolorous or more reddish; disk at first 

 dot-like, finally dilated and lecanorine; margin thickish, entire, con- 

 colorous; hypothecium colorless, upon an algal layer; paraphyses 

 simple, long and hair-like, conglutinate but finally distinct; asci 

 mostly cylindrical and the contents usually not well differentiated, or 

 ventricose, rarely clavate; thecium blue with I, the spores uncolored 

 or yellowish; spores ovoid to elongate-ellipsoid, simple, colorless, 

 usually containing a very large oil drop and the protoplasmic con- 

 tents irregular, ~ /*; Tuckerman says" /*, simple 



10 22 8 12 



and bilocular." The latter statement is probably an error, the 

 spores often appearing bilocular when within the asci but shown to be 

 simple when extruded. Further material is necessary to clear this 

 point. 



A rare plant; found but once on sandstone, in the vicinity of Stan- 

 ford University. Collected by Dr. Hasse on the same substratum 

 in the Santa Monica Range. Recorded by Tuckerman on granitic 

 rocks from North Carolina, Massachusetts, and New Hampshire. 



COLLEMACE^E. 



Thallus gelatinous when wet, usually foliaceous, but varying from 

 sub-crustaceous to fruticose, with Nostoc algae. Apothecia disk-like 

 or globose, sessile or innate, usually lecanorine, or sometimes biato- 

 rine, a proper margin present or lacking; the disk broad to dot-like; 

 paraphyses simple; spores 8, colorless, needle-shaped to globose, 

 straight or curved, simple to multilocular and muriform. 



