LICHENS OF THE STATE OF WASHINGTON 39 



27. Sticta Schreb. in Linn. Gen. PI. 8th ed., 2 :768. 1791. 



Thallus small to medium sized, foliose, horizontal or often somewhat 

 ascending, upper surface usually sorediate or isidiose; below villous or 

 tomentose, cortex interrupted by cyphellae; closely or loosely attached to 

 the substratum. Apothecia when present medium sized, in some species 

 very rare or perhaps never produced, circular or irregular in shape, mar- 

 ginal or scattered, adnate, sessile, or subpedicellate, thalline margin present 

 or absent; hypothecium hyaline or brownish; paraphyses unbranched, 

 septate; asci 8-spored; spores hyaline or brown, 1-7-septate. 



Alga Nostoc or Palmella. 



A. Cyphellae sorediate, elevated. 



B. Soredial cyphellae yellow, upper surface yellow sorediate. .2. 6". crocata 



B. Soredial cyphellae white, upper surface sparingly gray sorediate. 



1. 5". anthraspis 

 A. Cyphellae naked, concave. 



C. Upper surface abundantly covered with brown or black isidia. 



3. 5. fuliginosa 

 C. Upper surface not bearing isidia, but abundantly or sparingly covered 



with grayish soredia. 4. S. limbata 



C. Upper surface smooth, margins isidiose. 5. S. quercisans 



1. Sticta anthraspis Ach. Meth. Lich. 280. 1803. 



Thallus Isabella color (R), cinnamon brown, or greenish gray, medium 

 to large sized, cartilagineous-coriaceous, lobes broad, margins coarsely cren- 

 ate or sinuate, sometimes lacerate, rather deeply reticulate-pitted, sometimes 

 gray sorediate especially on the ridges ; below chamois (R), honey-yellow, or 

 smoky-brown, darker near the center, covered with a thin tomentum, inter- 

 spersed with white sorediate cyphellae ; loosely attached to the substratum. 

 Apothecia scattered, 1-4 mm. in diameter, sessile; disk chestnut-brown or 

 almost black, flat to slightly convex ; thalline margin thin, entire or some- 

 times denticulate, often disappearing; spores hyaline, fusiform, straight, 

 1-3-septate, 23.1-26.4 x 6.6-7.6 ix. 



On bark, on soil among mosses, or on rock. Pacific Co. : Loomis Lake, 

 1930, 4S9, 1940, 2851; Long Beach, 1928, 1846; Chinook, 1940, 2799. 

 Clallam Co.: Port Angeles, 1914, Foster 2637 (W). Thurston Co.: Gate, 

 1911, Foster (W). Kitsap Co. : Pt. Orchard, 1890, Parker (W). 



This Sticta is rather common and widely distributed in the lowlands, 

 west of the Cascades. Many large and beautiful specimens grow close to the 

 salt water. It is easily determined by the deeply reticulate-pitted thallus and 

 the white sorediate cyphellae. Plate II, B, C, D, 



2. Sticta crocata (L.) Ach. Meth. Lich. 277. 1803. Lichen crocatus Linn. 

 Mant. Ait. 310. 1771. 



Thallus light brownish green, brown, sepia (R), or Isabella color (R), 

 small to medium sized, membraneous-coriaceous, somewhat wrinkled and 



