178 SECTION HYGROCYBE 



95 



Hygrophorus pseudoparvulus, sp. nov. 



P ileus 1 cm Jatus, convexo-depressus, glaber, uvidus, hygrophanus, 

 striatus, aquoso-pallidus, delude albus; lamellae distantes, angustae, 

 deeurrentes, albae, fere cinnamomo-ochreae siccae; stipes 1 cm longus, 

 1.5 mm crassus, albus, siccus, nullum velum; sporae 5.5-6.5(7) X 

 2.8S.5 fx, anguste oblongae. Specimen typicum in Herb. Univ. Michi- 

 gan; ledum Tahquamenon Falls State Park, Mich., July 23, 1951, 

 A. H. Smith 37024. 



Pileus about 1 cm broad, convex-depressed, glabrous, moist, hy- 

 grophanous, watery-pallid and translucent striate, fading to white and 

 drying white. Context thin, white, odorless. 



Lamellae distant, narrow, decurrent, white, near "cinnamon buff" 

 as dried. 



Stipe about 1 cm long, 1.5 mm thick, equal, white, unpolished and 

 dry, no veil present. 



Spores 5.5-6.5(7) X 2.8-3.5 /x, narrowly oblong, hyaline in KOH 

 and Melzer's, smooth. Basidia 4-spored, 23-28 X 5-6 fx, narrowly cla- 

 vate. Pleurocystidia and cheilocystidia none. Gill trama of subparallel 

 hyphae the cells somewhat inflated. Epicutis of pileus of narrow 

 (2-4 fx) hyaline non-gelatinous hyphae. Clamp connections present. 



Habit, Habitat, and Distbibution — Solitary on a very rotten 

 log, Tahquamenon Falls State Park, Luce County, Mich. July 23, 1951. 



Matebial Studied — Michigan: Smith 37024. 



Observations — This species is a true Hi/grophorus of section Hij- 

 grocybe, and keys out nearest to H. subaustralis from which it differs 

 in the decurrent gills a^d narrow oblong spores, in addition to lacking 

 pleurocystidia. It is most closely related to H. parvulus from which it is 

 readily separated by its narrower spores and lack of pigment. The 

 very narrow spores preclude its being classified as an albino H. parvu- 

 lus. 



96 



Hygrophorus brevipes Sm. & Hes. 



Lloydia 5: 57. 1942 



Pileus 2-2.5 cm broad, obtuse becoming broadly campanulate to 

 plane with a low obtuse umbo, the margin sometimes flaring in age, 

 pure white or tinged cream color on the disc, fading to a dead white 

 and when dried white or very faintly cream color and shining, gla- 

 brous, hygrophanous to subhygrophanous, lubricous to subviscid. Con- 



