54 LICHENS OF THE STATE OF WASHINGTON 



1. Lecidea alhocaerulescens (Wulf.) Ach. Meth. Lich. 52. 1803. 

 Lichen alhocaerulescens Wulf. in Jaqu. Coll. Bot. 2:184. 1788. 



Thallus gray or greenish gray, thin to moderately thick, minutely 

 rimose-areolate. Apothecia circular or slightly irregular, 0.5-1.2 mm. in 

 diameter, immersed or adnate ; disk black, usually white pruinose, flat ; 

 proper margin thick, black, rarely disappearing; hypothecium thick, dark 

 brown or black; paraphyses coherent, tips enlarged slightly, colored; asci 

 8-spored ; spores hyaline, ellipsoid, nonseptate, 14.0-22.8 x 7.6-9.5 fx. 



On rocks : Clallam Co. : Elwha River Bridge, 1911, Foster 1792 (F). 



2. Lecidea alhocaerulescens var. flavocaerulescens (Hornem.) Schaer. 

 Lich. Helvet. Spicil. sect. 3:143. 1828. 



Lecidea flavocaerulescens Hornem. Icon. PI. Dan. 8: fasc. 24, 5. 1810. 



Thallus reddish orange, with a limiting black hypothallus; disk naked 

 or very slightly pruinose ; otherwise like the species. 



On rock: Whatcom Co.: Mt. Baker, Galena, 3800 ft., 1931, 1200. 

 Yakima Co. : Dewey Lake, 4800 ft., 1940, 3359. Clallam Co. : Lake Cres- 

 cent, Storm King Mountain, 4300 ft., 1935; A. H. Smith 2267 (F.) 



This lichen is easily recognized by the reddish orange of the thallus and 

 the black limiting hypothallus, 



3. Lecidea arctica Somrft. Suppl. Fl. Lapp. 156. 1826. 



Thallus brownish gray, granulose, granules minute, globular, wide 

 spread and finally heaped. Apothecia hemispherical to globose, often irregu- 

 lar, sometimes conglomerate, 0.2-0.8 mm. in diameter, immersed to adnate ; 

 disk very black, faintly gray pruinose; proper margin soon disappearing; 

 hypothecium brown; paraphyses coherent; asci 8-spored; spores hyaline, 

 oblong-ellipsoid, nonseptate, 15-25 x 6-8 \i.. 



On moss or soil : Washington Territory, Cascade Mountains, 1883, 

 Brandegee 50 (T). Whatcom Co.: Mt. Baker, 6000 to 7000 ft., Herre 

 (1919). 



4. Lecidea armeniaca (Lam. and DC.) Fries Syst. Orb. Veg. pars 1, 

 286. 1825. 



Rhisocarpon armeniacum Lam. and DC. Fl. Franc. 3rd ed., 2 :366. 1805. 



Thallus yellow, pale yellowish orange with a copperish tinge, or bay 

 (R), areoles thick, scattered or crowded, turgid and plicate-rugose, black 

 hypothallus showing between areoles also forming a fringe around the cir- 

 cumference. Apothecia circular, 0.5-2.0 mm. in diameter, immersed; disk 

 black, naked, flat to convex ; proper margin soon disappearing ; hypothecium 

 pale yellow or brownish ; paraphyses coherent, tips colored ; asci 8-spored, 

 spores hyaline ; ellipsoid, nonseptate, 9-13 x 5-6 fi. 



On rock: Washington Territory, Cascade Mountains, Brandegee (T). 



