Fungus Flora of ML Hood 145 



margin when moist, fading to "pinkish buff" and even when 

 dry, finally becoming finely radiately wrinkled, at very first 

 with concentrically disposed, superficial, hairy-silky to subfloc- 

 cose, white, evanescent scales, soon denuded, disk brownish in 

 age, margin at first incurved; flesh thin, 1-1.5 mm. thick, con- 

 color. Gills adnate-seceding, medium broad, 4-6 mm., nearly 

 plane, close, soon " drab "-colored, then "hair-brown" or darker, 

 edge white-flocculose. Stem very fragile, 7-10 cm. long, 4-5 

 mm. thick, thicker at base, tapering slightly upwards, from 

 the subclavate base, ivhite, lacerate floccose-silky up to the an- 

 nulus, apex pruinose, silky above ring,' stuffed to hollow, with 

 cartilaginous cortex, white within. Annulus membranous, soon 

 deflexed, white, coronillate on upper surface, densely silky or 

 floccose below, distant about one third from apex of stem, 

 derived from the universal veil, partial veil very scanty. Spores 

 elliptic-oblong, 6.5-8 x 3.5-4(4.5), smooth, dark purplish-brown 

 under the microscope; cystidia on sides and edge of gills, ventri- 

 cose-sublanceolate, obtuse, hyaline, thin-walled, pedicel rather 

 stout. Odor and taste mild or slight. 



On the ground in a swampy cedar and hemlock forest. 

 Cespitose or subcespitose. Mt. Hood, Oregon, Ocbober 16. 

 Collected by C. H. Kauffman. 



It belongs to the group Spintrigeri. Without a knowledge of 

 the detailed characters, it could easily be identified with S. 

 spintrigera Fr, It has not at all the habit of HypJioloma appendic- 

 ulatum with which Fries (10) compares his species. Our species 

 differs from S. spintrigera in its striatulate, scaly pileus, the 

 longer stems, broader gills, and, as far as is known, by the pres- 

 ence of cystidia on the sides of the gills. The spores are of 

 the same size as given by Rea (19) for 8. spintrigera, but Rea 

 departs from the sizes of the plant given by Fries and others by 

 including here a long-stemmed plant. According to Fries {I. c.) 

 the gills are very narrow, 2-A mm. wide, although this con- 

 ception has also been varied by later authors. Lange (10) de- 

 scribes a variety of S. spintrigera and has kept close to the 

 Friesian conception with respect to the habit assigned to it by 

 Fries. 



