44 LICHENS OF THE STATE OF WASHINGTON 



1. Nephroma laevigatum Ach, Syn, Meth. Lich. 242. 1814. 



Thallus greenish gray or chestnut-brown, small to medium sized, lobes 

 small and round, smooth to wrinkled and pitted, margins sinuate-crenate ; 

 below light or dark brown. Apothecia 1.0-5.0 mm. in diameter, adnate ; disk 

 reddish brown or brownish black, flat ; proper margin thin, sinuate ; spores 

 light brown, fusiform-ellipsoid, or pyriform, 3-septate, 16.5-23.8 x 6.6-7.0 ju,. 

 Medulla white, no reaction with KOH. 



On bark and mossy rocks : Kitsap Co. : Hidden Ranch near Bremerton, 

 213 ft, 1931, 1761a. Grays Harbor Co.: CopaHs, 1911, Foster 1421 (W). 



2. Nephroma laevigatum f. parile (Ach.) Mudd, Manu. Brit. Lich. 81. 

 1861. 



Lichen parilis Ach. Lich. Suec. Prodrom. 164. 1798. Nephroma parile 

 Ach. Lich. Univ. 522. 1810. 



Thallus thin, lobes somewhat elongated, margins abundantly gray or 

 brown sorediate ; otherwise much like the species. 



On bark and mossy rocks : Pend Oreille Co. : Metaline Falls, 2699 ft., 

 1931, 1476. Clallam Co.: near Port Angeles, 1800 ft., 1914, Foster 2908 

 (W). Ferry Co.: Republic, 1912, Foster 2358 (W). Incorrectly named 

 Nephroma resupinatum. 



3. Nephroma lusitanicum Schaer. Enum. Crit. Lich. Europ. 323. 1850. 



Thallus greenish gray, chestnut-brown, small to medium sized, lobes 

 round, smooth and shiny, or slightly wrinkled, margins crenate, crisp, or 

 undulate ; below smooth or glabrous, light or dark brown, or almost black, 

 smooth or glabrous. Apothecia 1.0-5.0 mm. in diameter, adnate; disk red- 

 dish brown, concave to flat ; proper margin thin, sinuate ; spores pale brown, 

 fusiform-ellipsoid, 3-septate, 13.0-23.0 x 6.0-7.0 ijl. Medulla yellow, purple 

 with KOH. 



On bark or rock : Pacific Co. : Loomis Lake, 1940, 2845; Chinook, 1940, 

 2819. San Juan Co. : San Juan Island, Trout Lake, 1940, 3228; Pt. Caution, 

 1940, 3275. Kitsap Co.: Hidden Ranch near Bremerton, 213 ft., 1931, 

 1761a. Thurston Co. : Gate, 1940, 2959. San Juan Co. : Henry Island, 1905, 

 Frye (W) ; Orcas Island, Olga, 1906, Fink 345 (W). Thurston Co.: 

 Gate, 1911, Foster 1938 (W). 



Perhaps the commonest Nephroma in the state ; the yellow medulla and 

 the purple color change of the medulla with KOH make this an easily deter- 

 mined species of Nephroma. 



4. Nephroma resupinatum (L.) Ach. Lich. Univ. 522. 1810. 



Lichen resupinatum Linn. Sp. PI. 1148. 1853. Nephroma tomentosum 

 (Hoffm.) Flot. 



Thallus greenish gray, olive-brown, or brown, medium sized to large, 

 lobes round, smooth to slightly tomentose, margin deeply and irregularly 



