LICHENS OF THE STATE OF WASHINGTON 49 



No fruiting specimens seen by the writer from this state as yet, but it 

 can easily be determined by the dense dark-colored tomentum on the lower 

 surface. 



7. Peltigera polydactyla (Neck.) Hoffm. Descript. and Adumbr. PI. 

 Lich. 1 :19. 1790. 



Lichen polydactyhis Neck. Meth. Muse. 85, 1771. 



Thallus greenish glaucescent (R), grayish green or brownish, medium 

 sized to large, thin, smooth, and shiny, lobes digitate, often ascending ; below 

 white or brownish, reticulate, with wide, whitish or brownish to blackish 

 veins; closely attached to the substratum with brown or black rhizoids, 

 Apothecia 2.0-6.0 mm. across, round or oblong, revolute, borne on the tips 

 of narrowly digitately clustered lobules, adnate; disk reddish brown; 

 proper margin crenulate ; asci 8-spored, spores hyaline, acicular, 3-7-septate, 

 60.0-89.0 X 2.5-4.0 ix. 



On soil or mossy tree trunks: Pacific Co.: Loomis Lake, 1931, 777. 

 Clallam Co. : Lake Sutherland, 590 ft., 1931, 1013; West Elwha Trail, 300 

 ft., 1940, 2896. Kitsap Co.: Hidden Ranch near Bremerton, 213 ft., 1931, 

 1732. King Co. : Grass Mountain Trail, 2200 ft., 1931, 706. 



Distinguished by the smooth and shiny upper surface and by the 

 ascending incurving, digitately clustered fertile lobules. 



8. Peltigera praetextata (Flk.) Wainio, Term. Fuz., 22:306. 1899. 

 Peltidea ulorrhiza var. praetextata Flk., in Somrft. Suppl. Fl, Lapp. 

 123. 1826. 



Thallus grayish green, rusty brown, or brown, small to medium sized, 

 slightly downy, lobes narrow, wavy, ascending at the margins, often covered 

 with light or dark coralloid branches, especially toward the margins ; below 

 whitish, rarely light brown, reticulated with light to dark brown veins, 

 rhizoids brown not abundant. Apothecia 2.0-5.0 mm. across, round or 

 somewhat oblong, revolute, borne on narrow upright lobules, adnate ; disk 

 reddish brown; proper margin denticulate; asci 8-spored, spores hyaline, 

 acicular, slightly curved, 3-5-septate, 39.6-49.5 x 3.3-4.0 fx. 



On soil or decaying logs : San Juan Co. : San Juan Island, Roche Har- 

 bor, 1928, 1851. Clallam Co.: Lake Sutherland, 590 ft., 1931, 1034. Kitsap 

 Co.: Hidden Ranch near Bremerton, 213 ft., 1931, 1733. King Co.: Edge- 

 wood, 1931, 300 ft., 1808. Pierce Co.: Mt. Rainier, trail to Moraine Park, 

 3300 ft., 1940, 2991; Dewey Lake, 4800 ft., 1940, 2774. Spokane Co.: 

 Indian Canyon, 1934, Sister Marion Loretta (WTU). 



Distinguished by the abundant coralloid branches, scattered over the 

 upper surface and margins of the thallus. 



9. Peltigera rufescens (Weis.) Humb., Fl. Frib. Specim. 2. 1793. 

 Lichen caninus, rufescens Weis. PI. Crypt. Fl. Goett. 79. 1770. 



Thallus grayish green or reddish brown, small to medium sized, thick, 

 smooth or downy, lobes narrow, margins crenate, crisp, often upright; 



