THE LICHEN FLORA OF THE SANTA CRUZ PENINSULA 1 47 



Apothecia innate, globose, very minute, rare in our specimens; 



3 ~ si 

 spores numerous, 35 to 60 in the asci, ellipsoid, /"• 



4-7 

 Rare; on sandstone at Laguna Creek, near the Pacific Ocean, 9 



miles north of Santa Cruz. Generally distributed over California 



and also found in southeastern Brazil. 



Smaller, thinner, and darker than Heppia guepini, and, as Tuck- 



erman states, much resembling a Collema in appearance. This 



species is also much infested with Endococcus pseudocarpus. 



3. HEPPIA HASSEI A. Zahlbr. 



Heppia hassei K.Z3ih[hx.^e\hei. Bot. Centralbl. 13: 157. 1902. 



Thallus thin, closely appressed, of small, rounded, olivaceous 

 squamules, lobulate-crenate to irregular, approximate, or separate 

 and distinct, the margin slightly ascendant; without distinct hypo- 

 thallus or rhizoids. 



A single apothecium immersed in each squamule, the disk ruby, 

 or dark reddish brown, at first dot-Uke, then enlarging to medium 

 size; the entire thalline margin very thin; hypothecium broad, yel- 

 lowish, of irregular hyphae; proper margin broad, of parallel sHghtly 

 septate hyphae; hymenium pale rose, 120-170/^ high, blue, soon 

 vinous red with I; asci numerous, ventricose-saccate, straight or 



22 — 27 



slightly curved, //; epithecium reddish; paraphyses gel- 



100 — 120 



atinous, simple, septate, about 3 ,« broad, their tips hardly broader; 



spores numerous, simple, colorless, oval, <". 



5-7 



Rare; on rocks, on a dry hill-side, at an altitude of about 800 

 feet. Hidden Villa Canon. Collected by Dr. Hasse on granite at 

 Palm Springs, the type locality, and also on rock in the Santa 

 Monica Range. 



This very inconspicuous and xerophytic lichen probably occurs 

 throughout the drier portions of the southwestern United States. 

 (Named for Dr. H. E. Hasse, army surgeon and botanist.) 



