LICHENS OF THE STATE OF WASHINGTON 105 



On rock: Chelan Co.: Rainbow Trail, 3500 ft., 1931, 1266. Okanogan 

 Co. : Tonasket, 1200 ft., 1388, 



2. Acarospora Schleicheri (Ach.) Mass. Ricerch, Auton. Lich. 27. 1852. 

 Urceolaria Schleicheri Ach. Lichenogr. Univers. 332. 1810. 

 Lecanora Schleicheri (Ach.) Nyl. 



Thallus pale sulphur color or yellowish-white, tartareous, indetermi- 

 nate, consisting of squamules, rather thick, rough, fiat to convex, often 

 crowded and angular, margin somewhat lobate or crenate; below reddish 

 brown. Apothecia usually solitary but occasionally 3-4 in each squamule, 

 0.4-1.0 mm. in diameter, immersed; disk reddish brown or black, flat, 

 slightly roughened ; thalline margin concolorous with the thallus, entire or 

 crenate; hypothecium hyaline; paraphyses subdistinct; spores hyaline, 

 almost spherical, nonseptate, 3.0-4.0 x 1.5-2.0 p.. 



On soil: Ferry Co.: Republic, 1912, Foster 2367 (F). Fink (1935) 

 reports this species from the state. 



When moist this is a very conspicuous lichen because of the bright yel- 

 low squamules and the reddish brown disks of the apothecia. 



3. Acarospora flava (Bell.) Trevis. Revista Periodic. Lavori I.R. Accad. 

 Padova, 262. 1851-52. 



Lichen flavus Bell. app. Fl. Pedemont. 261. 1792. 

 Lecanora chloroplana Ach. 



Thallus intensely bright lemon yellow (R), sometimes with a tinge of 

 green, determinate, consisting of squamules, areolate or of elongated squam- 

 ules, folded, smooth, or warty, convex, marginally lobate, lower cortex 

 lacking. Apothecia crowded towards the center of the lichen mat, 1 -several 

 in each squamule, immersed or adnate ; disk yellow or reddish brown, flat 

 or convex ; thalline margin concolorous with the thallus, entire, or flexuous ; 

 hypothecium hyaline; paraphyses distinct; spores hyaline, oblong or oval, 

 nonseptate, 2.0-4.0 x 1.0-2.0 fx. 



On rock: Yakima Co.: Naches, gulch near Gleason's Ranch, 1350 ft., 

 1931, 909; 1940, 3173. Chelan Co. : butte near Chelan, 2500 ft., 1931, 1358. 

 Ferry Co.: Republic, 1912, Foster 2320 (F). Whitman Co.: Pullman, 

 1900, R. K. Beattie 45 (F). 



A showy and beautiful rock lichen, rather common east of the Cascades. 



4. Acarospora washing tonensis H. Magn. Ann. Crypt. Exot. 6 :46. 1933. 



Thallus various shades of brown, indeterminate, consisting of squam- 

 ules, scattered or somewhat clustered, verrucose or smooth, irregularly 

 convex; below pale brown. Apothecia solitary or occasionally 2-3 in each 

 squamule, 0.3-0.6 mm. in diameter, immersed; disk dark brown, flat to 

 convex; thalline margin concolorous with the thallus, well developed, 

 broad; hypothecium hyaline; paraphyses distinct; spores hyaline, broadly 

 ellipsoid or subglobose, nonseptate, 3.5-5.5 x 3.5-4.0 /t. 



