132 LICHENS OF THE STATE OF WASHINGTON 



This is a small inconspicuous Parmelia, which may account for the few 

 collections made. 



n. Parmelia prolixa (Ach.) Rohl. Deutschl. Fl. 3, Abt. 2:100. 1813. 

 Parmelia olivacea var. prolixa Ach. Meth. Lich. 214. 1803. 



Thallus dusky drab (R), oHve-brown (R), or blackish brown (R), 

 orbicular to suborbicular, loosely adnate, divided into short or often long, 

 narrow, crowded, rough and rugose or smooth and shiny, radiating lobes, 

 often bearing white or brown coralloid branches, margins wavy or crenate, 

 usually ascending, smooth and shiny ; below dark brown or black, bearing 

 black rhizoids. Apothecia 1-6 mm. in diameter, sessile; disk reddish brown 

 or blackish brown (R), concave to flat; thalline margin entire or sub- 

 crenate; asci 8-spored; spores hyaline, ellipsoid, nonseptate, 7.0-14.1 x 

 5.0-8.0 II. 



Usually on rocks, rarely on bark : San Juan Co. : San Juan Island, Pt. 

 Caution, 1928, 1917. Chelan Co.: butte near Chelan, 2000 ft., 1931, 1329. 

 Okanogan Co.: Brewster, 2450 ft., 1931, 1467. Lincoln Co.: Davenport, 

 2450 ft., 1931, 1504. Garfield Co.: Pomeroy, 1860 ft., 1940, 2737. Spokane 

 Co.: Spokane, 1929 ft., 1940, 2749. Clallam Co.: Sequim, 1916, /. M. 

 Grant 558 (F). Walla Walla Co.: Wallula, 1906, Foster 298 (F). 



This species is widely distributed, but not very abundant anywhere. 

 The numerous coralloid branches, which are often broken, exposing the 

 white medulla, are a good distinguishing character. 



12. Parmelia pubescens (L.) Wainio, Meddel. Soc. Fauna & Fl. Fenn. 

 14:22.1888. 

 Lichen pubescens L. Sp. PI. 1155. 1753, 

 Parmelia lanata (L.) Wallr. 



Thallus subfruticose, blackish brown (R) or fuscous-black (R), 

 slender, terete, somewhat flattened filaments, rather irregularly dicho- 

 tomously branched, decumbent, sometimes shiny ; below somewhat lighter, 

 attached to the substratum by short, thick, disk-like holdfasts, rhizoids 

 small and scarce. Apothecia 1-5 mm. in diameter, sessile; disk concolorous 

 or black, flat; thalline margin entire or granulose; asci 8-spored; spores 

 hyaline, globose to ellipsoid, nonseptate, 6.0-10,0 x 4.0-6.0 fi. 



On rock, on a thin layer of soil over rock, or bark : Pierce Co. : Mt. 

 Rainier, Paradise Park, 5550 ft., 1928, 1874a; Yakima Park, 6300 ft., 1931, 

 598. Klickitat Co.: Goldendale, 2000 ft., 1931, 1686. Chelan Co.: Rainbow 

 Trail, 3500 ft., 1931, 1247. Whatcom Co.: Ruth Mt., 5500 ft., 1928, L. 

 Sunquist 1902. Mt. Rainier, 1925, /. M. Grant 404 (F). Klickitat Co.: 

 Goldendale, on Steptoe Butte, 1909, Foster 1179 (F). Ferry Co. : Republic, 

 Maye's Butte, 1913, Foster 2400 (F). 



An interesting alpine lichen, not found below 2000 ft., collected in many 

 rather widely separated mountainous regions of the state. Its resemblance 



