LICHENS OF THE STATE OF WASHINGTON 27 



throughout. Apothecia small, circular, adnate to sessile; proper margin 

 present, hypothecium hyaline, pale yellow or yellowish brown ; paraphyses 

 unbranched, slightly enlarged at the tips ; asci 8-spored ; spores hyaline, 

 1 -septate. 



Alga Scytonema. 



A. Thallus medium sized, foliose, margins bearing minute, white cilia. 



LP. albociliatum 

 A. Thallus minute, pulvinate, margins not bearing minute, white cilia. 



2. P. muscicola 



1. Polychidium albociliatum (Desm.) Zahlbr. in E. P. Nat. Pfl. Teil. 1, 

 Abt, 1, 157. 1907. Leptogium albociliatum Desm. Ann. Sci. Nat. Bot. 

 sen 4, 4: 132. 1855. 



Thallus foliose, olive-green, or greenish black, medium sized, irregu- 

 larly lobed, lobes rounded, crisped and crenate, finally lacerate, often 

 minutely granulose in the center, margin bearing minute, white, cilia ; below 

 paler, more or less covered with a fleecy nap. Apothecia scattered, 3.0-1.2 

 mm. in diameter, numerous and often becoming crowded, sessile; disk 

 reddish brown, flat to convex ; proper margin thin, soon disappearing ; 

 hypothecium hyaline or pale yellow; spores hyaline, spindle-shaped, 1- 

 septate, 18.0-26.6 x 7.6-9 }i. 



On moss growing over rocks : Ferry Co. : Maye's Butte near Republic, 

 1913, Foster 2294 (W). Spokane Co. : Spokane, 1906 (F). 



2. Polychidium muscicola (Sw.) S. Gray, Nat. Arr. Brit. PI. 1 : 402. 1821. 

 Lichen muscicola Sw. Nov. Act. Acad. Upsal. 4: 248. 1784. Leptogium 

 muscicola (Swartz) Fries. 



Thallus pulvinate, brown, greenish brown, or a very dark greenish black, 

 minute, irregularly branched, branches interwoven, mostly terete, decum- 

 bent. Apothecia appressed, 0.2-0.8 mm. in diameter, circular, sometimes 

 irregular adnate to sessile; disk brownish red, flat to convex; proper 

 margin thin, slightly paler than the disk ; hypothecium yellowish brown ; 

 spores hyaline, oblong-fusiform, 1 -septate, 17-30 x 5-8 ix. 



On mossy rocks or soil: Washington Territory, Suksdorf (F), Ex. 

 Herb, of C. E. Faxon. 



13. COLLEMACEAE 



Thallus usually foliose, varying from subcrustose to fruticose ; gelatinous 

 when moist, brittle when dry; with or without distinct cortices or having 

 only an upper pseudocortex, inside hyphae ramify through the algal colony ; 

 adhering closely to the substratum or attached by rhizoids. Apothecia 

 globose or disk-like, marginal or scattered, immersed to adnate, both proper 

 and thalline margins present or only a proper one; asci 8-spored; spores 

 hyaline, nonseptate, many-septate or muriform. 



Alga Nostoc. 



