48 LICHENS OF THE STATE OF WASHINGTON 



matic hyphae on the upper surface and a light-colored or rarely brownish 

 lower surface. Plate III, B, C. 



4. Peltigera canina f. memhranacea (Ach.) Duby, Bot. Gall. 2:598. 1830. 

 Peltidea canina var. memhranacea Ach. Lich. Univ. 518. 1810. 



Thallus greenish gray, ashy, or various shades of brown, large, thin, 

 pitted, well covered with trichomatic hyphae, hair-like down, lobes broad, 

 rounded, margins wavy; below whitish, rarely brown, reticulated with 

 veins of same color or darker, rhizoids scattered, whitish or brown. Apo- 

 thecia small, 3.0-5.0 mm. across, otherwise the same as the species. 



On soil, mosses, or decaying logs : San Juan Co. : San Juan Island, Pt. 

 Caution, 1928, 2010. King Co.: Edgewood, 300 ft., 1931, 1817; Mt. 

 Rainier, White River Camp, 3900 ft., 1940, 1265. Columbia Co.: Blue 

 Mountains, 3500 ft., 1931, 1622. Clallam Co.: Port Angeles, 1914, Foster 

 (W). Skagit Co.: Hamilton, 1905, Foster (W). 



5. Peltigera leptoderma Nyl., Syn. Lich. 1 :325. 1860. 

 Peltigera canina var. sorediata Tuck. 



Peltigera sorediata (Schaer.) Fink. 



Thallus pale grayish green or light brown, small, downy, lobes round, 

 with prominent groups of erumpent whitish or gray-green soredia near the 

 center, margins slightly ascending, wavy ; below white or ashy, with a close 

 tomentum of fine veins and closely attached to the substratum with rather 

 long pale rhizoids. Apothecia rare, sterile in the state. 



On soil or rock: Yakima Co.: Bumping Lake, 3400 ft., 1931, 937; 

 American River Camp, 2800 ft., 1931, 953. Chelan Co.: Rainbow Trail, 

 3800 ft., 1931, 1265. Ferry Co.: Laurier, 1644 ft., 1931, 1444. San Juan 

 Co. : Orcas Island, Olga, 1906, Fink 346 (W). Snohomish Co. : Marysville, 

 1926, Grant (F). 



This Peltigera is rather easily recognized by the small thallus, with scat- 

 tered gray-green or whitish soredial masses. 



6. Peltigera malacea (Ach.) Funck, Crypt. Gewach. Heft 33:5. 1827. 

 Peltidea malacea Ach. Syn. 240, 1814. 



Thallus buffy-olive (R), tawny-olive (R), or various shades of brown, 

 medium sized, slightly pulverulent or downy, rather thick and spongy, hori- 

 zontal or wavy ; below brown or black with a close tomentum, paler toward 

 the edges, rhizoids scarce. Apothecia 3.0-7.0 mm. across, round, revolute, 

 borne on the tips of extended lobules, adnate ; disk reddish brown or black ; 

 proper margin crenulate ; asci 8-spored, spores hyaline, acicular, 3-5-septate, 

 22.9-75.9 X 2.6-5.0 /^. 



On soil and rock : Island Co. : Whidbey Island, 1931, 1771. Pierce Co. : 

 Berkeley Park, 6000 ft., 1940, 3023. Yakima Co. : Deadhorse Hill, 4500 ft., 

 1931, 984. Chelan Co.: Rainbow Trail, 3500 ft., 1931, 1281 ; Merritt, 2186 

 ft., 1931, 1079. Ferry Co. : Laurier, 1644 ft., 1931, 1431. 



