LICHENS OF THE STATE OF WASHINGTON 45 



wavy or laciniate; below lighter in color, densely tomentose, with white 

 tubercules. Apothecia 2.0-15.0 mm. in diameter, adnate ; disk reddish 

 brown, tawny when wet, flat becoming uneven; proper margin slightly 

 crenate, concolorous with the thallus ; spores pale-brown, fusiform-ellipsoid, 

 3-septate, 15.8-26.4 x 4.0-6.9 ii. Medulla white, no reaction with KOH. 



On bark and rock : Pacific Co. : Loomis Lake, 1940, 2847. King Co. : 

 Grass Mountain Trail, 2200 ft., 1931, 708. Grays Harbor Co.: Westport, 

 1908, Foster 666 dup. (W). Clallam Co.: Port Angeles, Coleman's, 1914, 

 Foster 2625 (W). Thurston Co. : Gate, 1911, Foster 1947 (W). King Co.: 

 Seattle, 1891, Parker 16 (W). 



The white tubercules on the under side are a distinguishing character. 



5. Nephroma resupinatumi. helveticum (Ach.) Rabh. Deutschl. Kryptog. 

 Fl. 2:68. 1845. Nephroma helveticum Ach. Lichenogr. Univ. 523. 1810. 



Thallus gray green, tawny, or brown, small to medium sized, lobes 

 round, smooth, with now and then a few lobules scattered over the surface, 

 margins fringed with tooth-like lobules; below cinnamon-buff (R), smoke- 

 brown (M.&P.), or blackish brown, tomentose. Apothecia 2.0-7.0 mm. in 

 diameter, adnate ; disk reddish brown to black, flat ; proper margin wavy ; 

 spores brownish, fusiform-ellipsoid, 3-septate, 19.8-26.4 x 4.3-6.6 [x. Medulla 

 white, no reaction with KOH. 



On bark and rock: Pacific Co.: Chinook, 1940, 2819a. Pierce Co.: 

 White River Camp, 3000 ft., 1928, 1828 ; Mt. Rainier, trail to Seattle Park, 

 4000 ft., 1940, 3049. Clallam Co. : Port Angeles, Coleman's, 1914, Foster 

 2626 (W), determined as Nehproma laevigatum. King Co.: Summit, 1907, 

 Foster 646 (F). 



Margins fringed with tooth-like lobules and lack of white tubercules on 

 the under surface separate this form from the species. 



30. Peltigera Willd. Fl. Berol. Prodro. 347. 1787. 



Thallus foliose, often large, and wide spreading horizontally, with a 

 well-developed pseudoparenchymatous cortex on the upper surface, entirely 

 lacking on the lower surface, definite algal and medullary layers, with 

 rhizoids arising from the lower hyphae; upper surface naked or covered 

 with a fine down, lower surface with more or less anastomosing veins; 

 more or less firmly attached to the substratum by tufted rhizoids. Apothecia 

 circular to elliptical, marginal, adnate on the upper side of the narrow, ex- 

 tended lobes ; proper margin present, thalline margin absent ; hypothecium 

 hyaline or brownish ; paraphyses unbranched, septate, enlarged at the tips ; 

 asci usually 8-spored, rarely only 6-spored; spores hyaline or brownish, 

 often curved, 3-7-septate. 



Alga Palmella, Dactylococcus, or Nostoc. 



A. Thallus bearing brown to blackish wart-like bodies (cephalodia), thallus 

 turns bright green when moist. 



