LICHENS OF SANTA CRUZ PENINSULA 367 



very small, but finally large, rounded or irregularly oblong, 

 prominent and dome-like, reaching a diameter of 8 mm. ; 

 beautifully gyrose-plicate, black ; spores simple, colorless, short 

 ellipsoid, ''Vll'7^'^ mic. 



" differt a G. aiigulata apotheciis omnlno aliis, a G. viuhlcn- 

 bergii^ quacum forma apotheciorum convenit, thallo minore, 

 subtus atrofibrillosus, non reticulato." A. Zahlbruckner in litt. 



Abundant on high sandstone cliffs in Devils Canon, at an 

 altitude of 2000-2300 feet ; mingled with G, -phoia and G. foly- 

 ■phylla but from its greater size and abundance forming the 

 dominant tone of the rock lichen flora. As yet not found else- 

 where in the range. 



Type, No. 682, Stanford Univ. Herbarium. Type locality, 

 Devils Canon, Santa Cruz peninsula, Cal. Cotypes in Herb. 

 Hasse, Herb. Herre and Royal Botanical Museum in Vienna, 

 Austria. Coll. A. C. Herre, July 28, 1905. 



X. Sticta (Schreb.) Fr. 



Thallus foliaceous, leaf-like, the fronds usually wide-lobed, 

 rounded or elongate. Color of our species various ; green, 

 brown, russet, or black ; under side pale, villous or fleecy, 

 dotted with cyphels or pale bare spots. Apothecia shield-like, 

 marginal or scattered, sessile, the disk red-brown and darken- 

 ing or black. Spores elongated, slender, 2- to 4-locular, color- 

 less. 



Growing on trees, dead wood, rocks, and earth. 



For the present the arrangement of Tuckerman has been 

 followed, though the genus as given by him probably includes 

 at least three good genera, if not four. 

 Sticia Schreber in L. Gen. PI. ed. 8. 2 : 768. 1791. 

 Sticta Fries, Lich. Europ. Reform. 49, 348. 183 1. 



KEY TO THE SPECIES. 



a. Under side of thallus without cyphels; marked by naked pale 

 areas or spots. 

 b. Spots large, convex; between, more or less brown-veined. 



I. pulmonaria^ 368. 



bb. Spots small, white or pale, flat or sunken, scattered through 



the dense, dark nap 5. scrobiculata^ 369. 



