THE LICHEN FLORA OF THE SANTA CRUZ PENINSULA 43 



utely granulose, of a handsome bluish gray color, shading off to ashen; 

 KOH-; CaCl 2 O 2 -. 



Apothecia one to several in each areole, the perithecium sunken in 

 the thallus, globular, entire, thick, black; ostiole from sunken becom- 

 ing elevated, circular, thickish; hymenial gelatine blue with I; spores 

 8, simple, colorless at first, at last brownish, elongate-ellipsoidal, 



6 - 8.5 



/< 

 i4i - 22 



On rocks in the foothills near Stanford University, at an latitude 

 of 150 feet. On a rock beside the road to Lick Observatory, alt. 

 about 800 feet, Mt. Hamilton Range. 



(stanfordi, because found near Stanford University.) 



DERMATOCARPACE JE . 



Thallus foliaceous or squamaceous, with a cortex of pseudoparen- 

 chyma upon one or both sides; fastened to the substratum by an 

 umbilicus, by rhizoids, or adherent by the medulla; gonidia of Pleuro- 

 coccus algae. Apothecia solitary, erect, with a minute pore at the 

 summit, more or less immersed in the thallus. 



KEY TO GENERA. 



Apothecia without gonidia II. Dermatocarpon 



Apothecia containing gonidia III. Endocarpon 



II. Dermatocarpon (Esch.) Th. Fr. 



Dermatocarpon Eschweiler, Syst. Lich. Gen. 21. 1824. 

 Dermatocarpon Th. Fries, Gen. Het. Europ. 103. 1861. 



Thallus leafy and greatly expanded or reduced to areolate squa- 

 mules; umbilicate, or appressed and adnate; the algal layer beneath 

 the upper cortex. Apothecia solitary, erect, minute, immersed, or 

 with only the apical portion emergent upon the surface, upon which 

 they appear as minute specks; perithecium clear or black, globular or 

 ovoid, without algae; paraphyses usually gelatinizing, rarely poorly 

 developed and then branched and net-like; asci 8 16 spored; spores 

 ellipsoid, simple, colorless. 



Proc. Wash. Acad. Sci., May, 1910. 



