LICHENS OF THE STATE OF WASHINGTON 133 



to small mats of tangled hair makes it an easy species to recognize in the 

 field. 



U. Parmelia stygia (L.) Ach. Meth. Lich. 203. 1803. 

 Lichen stygius Linn. Sp. PI. 1143. 1753. 



Thallus black or fuscous-black (R), small, subfruticose, shiny, de- 

 pressed or procumbent, palmately or irregularly branched, lobes flat or 

 convex, very narrowly linear, intricately twisted, often becoming terete, 

 forming imbricated crust-like masses, tips curved under, loosely attached 

 to the substratum; below black, with short rhizoids. Apothecia flexuous, 

 2-6 mm. in diameter, sessile; disk dark brown or black, slightly concave 

 to flat; thalline margin entire or slightly granular; asci 8-spored; spores 

 hyaline, ellipsoid, nonseptate, 7.0-9.0 x 5.0-6.0 fx. 



On rocks : Pierce Co. : Mt. Rainier, Burroughs Mountain, 7300 ft., 1931, 

 607; Tatoosh Range, Pinnacle Peak, 6562 ft., 1909, Foster 1055 (F). 



A rare species collected only in the high mountains. 



14. Parmelia conspersa (Ehrh.) Ach. Meth. Lich. 205. 1803. 



Lichen conspersus Ehrh. in Ach. Lich. Suec. Prodro. 118. 1798. 



Thallus grayish-olive (R), straw yellow (R), or greenish-straw yellow 

 (R), membranaceous, at first orbicular, finally widely spreading and very 

 irregular in shape, adnate, smooth and shiny, or somewhat wrinkled and 

 dull, lobes long and narrow, imbricated, pinnatified, dichotomously or 

 irregularly branched, lobes long and narrow, arising from the center, form- 

 ing irregular elevated heaps, margins entire or crenate, tips of lobes ap- 

 pressed and dilated ; below pale to purplish-brown, rarely black, with short 

 black, evenly distributed rhizoids. Apothecia abundant, 2-8 mm. in di- 

 margin incurved, crenulate; asci 8-spored; spores hyaline, ellipsoid, non- 

 septate, 7.5-12.0 X 4.5-6.0 ii. Upper cortex reddish brown with paraphen- 

 ylenediamine. 



Usually on rock, rarely on wood : Clallam Co. : San Juan Island, 

 Friday Harbor, 1931 2107; Orcas Island, Mt. Constitution, 2500 ft., 1928, 

 2046. Chelan Co. : White Rock Camp, 2100 ft., 1931, 1055; Rainbow Trail, 

 3500 ft., 1931, 1251. Ferry Co.: Mt. Gibraltar near Republic, 3100 ft., 

 1940, 2169. Garfield Co. : Pomeroy, 1860 ft., 1940, 2726. Whitman Co. : 

 Steptoe Butte, 3700 ft., 1940, 2222. San Juan Co. : San Juan Island, Friday 

 Harbor, 1905, Frye (W). Ferry Co.: Republic, 1912, Foster 2290 (F). 

 Whitman Co.: Pullman, 1913, Weaver 25 (F). San Juan Co.: Mt. Con- 

 stitution, 2200 ft., 1904, Frye 22 (W). 



A common species, wherever rocks are plentiful. 



15. Parmelia conspersa var. isidiata (Anzi) Berry. Monograph Gen. Par- 

 melia in N. Am. north of Mexico. Ann. Mo. Bot. Gard. 28: 76. 

 1941. 

 Parmelia conspersa f. isidiata Anzi Cat. Lich. Sondr. 28. 1860. 



