THE LICHEN FLORA OF THE SANTA CRUZ PENINSULA lOI 



or sometimes extended downward into stipes; mostly dusky greenish 



but varying also from whitish to brown-green and black-green, 



usually white pruinose; with KOH turning dusky brown. 



Apothecia medium to large, sub-innate to sessile, at first concave 



but soon plane or plano-convex, finally strongly convex; the black 



disk with a thick, whitish or pruinose margin which soon disappears; 



epithecium granulose, dark; paraphyses thick, free, their enlarged or 



spatulate and blunt tips dark greenish; thecium colorless, blue with 



I; hypothecium brownish; spores bi-locular, spindle-shaped to nearly 



2.5 — 3.5 ^, 2-4 



needle-like, /«; /<," Tuck. 



20 — 30 14 — 27 



On earth in rock crevices on Black Mt., at from 2400 to 2700 feet 

 elevation. An earth and Hme-rock lichen of Europe; in America 

 only in cold mountains or the far north. 



In our specimens the disk is naked, but in specimens collected by 

 me in Styria the apothecia are mostly white pruinose, the whole plant 

 often seemingly covered with hoar frost. 



2. TONINIA SQUALIDA (Schleich.) Mass. 



Lichen squalidus Schleicher, PI. Crypt. Helvet. Cent. Ill, no. 75. 



1807. 

 Toninia squalida Mass., Ric. Aut. Lich. Crost. 108. 1852. 

 Lecidea squalida Ach. Lich. Univ. 169. 1810. 

 Lecidea squalida Tuck. Syn. N. Am. Lich. 64. 1888. 



Thallus a close, uneven crust of small, rather thick and closely 

 appressed, rugose-pHcate squamules, often sub-Iobate; livid brown 

 and blackening; shghtly reddish with KOH. 



Apothecia numerous, small, closely adnate, the black disk plane, 

 bordered by a thickish, regular margin; apothecia also larger, becom- 

 ing irregular, confluent, and convex, when the margin is excluded; 

 pale wdthin; paraphyses free, slender, their blackish tips enlarged and 

 rounded; hypothecium pale reddish brownish; epithecium granulose, 

 violaceous or purplish with KOH, the entire internal structure 

 becoming more or less suffused with the same tint; thecium blue with 



12 — 15 



I, the asci clavate, -r /^; spores 4-6 locular, finger or needle- 



48 - 52 



2.5 — 4 



shaped, straight or curved, — Z^- 



^ '28-37 



