94 LICHENS OF THE STATE OF WASHINGTON 



B, Squamules not palmate-digitate. 



E. Plant shrub-like, squamules umbilicate ; cephalodia containing 



Stigonema 2). S. denndatum 



E. Plant not shrub-like, squamules coarsely granular ; cephalodia zon- 



iQ.\nmg Nostoc 2. S. alpinum 



1. Stereocaulon albicans Th. Fr. De Stereocaul. et Pilophor. Comment. 

 36. 1857. 



Stereocaulon nanum Tuck. Stereocaulon tenellum Tuck. 



Primary thallus present or soon disappearing. Podetia chalky-white, 

 caespitose, short, usually less than 1 cm. long, slender, fragile, branched, 

 branches close together, intertwined, lower part of podetia smooth, upper 

 part bearing greenish gray or gray granular squamules, that often become 

 white powdery masses. Apothecia absent. KOH+, yellow. 



On soil: Chelan Co.: Merritt, 2186 ft., 1931, 1087a. Yakima Co.: Cliff 

 near Naches Ranger Station, 2400 ft., 1940, 3329. Fink (1935) reports it 

 from Washington. 



This small and inconspicuous lichen is probably much more common in 

 the state than the few stations reported indicate. 



2. Stereocaulon alpinum Laur. in Funck, Cryptog. Gewachse 33, Heft 6. 

 1827. 



Podetia grayish white or pale brown, stout, rather short, congested, 

 erect or decumbent, frequently branched, tomentose, squamules appear as 

 coarse crowded warty granules, on lower part of the podetia, becoming 

 "incised crenate" Dodge (1929) ; cephalodia small, bluish green, greenish 

 gray, or dark bluish glaucous (R) when wet, grayish white when dry, 

 rather conspicuous, called the spherical type by Johnson (1938), con- 

 taining Nostoc. Apothecia rare, terminal or lateral, medium to large, 1.0-3.5 

 mm. in diameter; disk reddish brown or brownish black, flat to convex, 

 often swollen and breaking; proper margin concolorous with the disk, soon 

 disappearing; spores hyaline, acicular, 3-septate, 20.0-37.0 x 3.0-4.0 ju,. 

 KOH+, yellow. 



On soil or rocks: Whatcom Co.: 5500 ft., 1928, L. Sunquist 1834. 

 Pierce Co.: Mt. Rainier, trail to Moraine Park, 3300 ft., 1940, 3000; 

 Grand Park, 5575 ft., 1931, 1835; Berkeley Park, 6000 ft., 1940, 3019; 

 Burroughs Mt., 7300 ft., 1931, 606. Okanogan Co. : Twisp Summit, 6060 ft., 

 1931, 1316. 



A rather common alpine lichen, characterized by short congested po- 

 detia with coarsely granular squamules. 



3. Stereocaulon denudatum Flk. Deutschl. Lich. part 4:13. 1819. 



Podetia grayish white or some shade of brown, short to medium in 

 length, solitary or densely crowded, erect or ascending, slender, shrub like, 

 branching in the upper part of the podetia, lower part smooth, upper 



