SUBSECTION CAMAROPHYLLI 385 



gray fibrils below the line where the veil breaks, dry, glutinous in the 

 button stage around the base from the gluten of the pileus. 



Spores 9-13 X 5.5-7 /a, ellipsoid, smooth, yellowish in Melzer's 

 reagent. Basidia 48-62 X 7-10 /a, 4-spored. Pleurocystidia and cheilo- 

 cystidia none. Gill trama divergent, hyphae 4-10 /a broad. Cuticle a 

 gelatinous zone, 120-200 tt thick, hyphae fuscous, 4-7 /a broad. No 

 hypodermium differentiated. Pileus trama of interwoven, radially 

 disposed hyphae. 



Habit, Habitat, and Distribution — On soil, in woods, Idaho, Au- 

 gust. 



Material Studied — idaho: Smith & Bigelow 46726 (type, from 

 Cape Horn Summit, Aug. 25, 1954); Smith 46904. 



Observations — This species is distinguished from H. fuscoalbus by 

 its dry stipe. It is closest to H. limacinus variety intermedins but lacks 

 a gelatinous coating over the colored fibrils of the stipe. 



239 



Hygrophorus albofuscus, sp. nov. 



Hygrophorus fuscoalbus var. occidentalis Kauff., Agar. Mich., p. 187. 

 1918. 



Pileus 2-5 cm latus, extensus convexus deinde planus vel depres- 

 sus, livido-cinero-fuscus, demum albofuscus, nonnumquam disco sub- 

 niger, viscidus, glaber, margine involutus et floccosus; lamellae adna- 

 tae demum decurrentes, cremeo-albae, subdistantes demum arctae, 

 angustae; stipes 3-7 cm longus, 4—6 mm crassns, albus vel pallidus, 

 aequalis vel deorsum se attenuans, siccus, apice floccoso-scabrosus, aliis 

 locis floccoso-pruinosus, glabrescens; sporae 5.5-8 X 3-4.5 /a, ellipsoi- 

 deae. Specimen typicum in Herb. Univ. Mich, conservatum; ledum 

 Ann Arbor, Mich., Aug. 23, 1912, C. H. Kauffman. 



Pileus 2-5 cm broad, convex-expanded, at length plane or de- 

 pressed, livid grayish brown to brownish-ashy, sometimes blackish on 

 disc, viscid when moist, glabrous, becoming fragile, margin at first in- 

 volute and floccose-downy, even. Context white, rather thin, rather 

 soft; odor and taste mild. 



Lamellae adnate to decurrent, creamy white, subdistant to close, 

 rather narrow venose, interspaces. 



Stipe 3-7 cm long, 4-6 mm thick (rarely 10-12 mm ), slender, rarely 

 stout, white or pallid, equal or tapering downward, dry solid, straight, 

 or curved at base, sometimes flexuous, rather fragile, apex floccose- 

 pruinose, glabrescent. 



Spores 5.5-8 X 3-4.5 /*, ellipsoid, smooth, colorless or only faintly 



