360 SECTION HYGROPHORUS 



Stipe 3-6 cm long, 3-25 mm thick at apex, white at first, a few 

 flushed with color of cap in age, not darkening to more than pale 

 salmon-buff around wormholes, dry, narrowed below or equal, no veil. 



Spores 10-14 X 5.5-7.5 fx, ellipsoid, smooth, yellowish in Melzer's 

 reagent. Pleurocystidia and cheilocystidia none. Basidia 56-82 X 7-11 fx, 

 4-spored. Gill trama divergent, hyphae 4-10(14) fx broad. Cuticle an 

 ixocutis, hyphae 3-5 /x broad, occasionally more or less erect, slightly 

 gelatinous. No hypodermium differentiated. Pileus trama of interwoven 

 hyphae, disposed both radially and periclinally. Clamp connections on 

 the cuticular and gill trama hyphae. 



Habit, Habitat, and Distbibution — Gregarious on soil and moss, 

 in coniferous woods (larch, spruce, fir), Idaho and Canada, August- 

 November. 



Matebial Studied — idaho: Smith 23537, 53239 (type, from Pay- 

 ette Lakes, Sept. 9, 1956), 53297, 53444, 53454, 53540, 60524, 60539. 

 Canada: (Nova Scotia) Kenneth A. Harrison 2049; (Quebec) Smith 

 61556, 61839. 



Obsebvations — This species is distinctive in appearance in its buff 

 to brownish pileus which is flushed vinaceous and becomes fibrillose- 

 streaked, its broad, distant, decurrent gills, its large spores, and its large 

 basidia. The flesh has the odor of bitter almonds, or cherry pits. In one 

 collection (Smith 60524) the odor is lacking. In this collection, the 

 carpophores appear abnormal, somewhat as if slightly parasitized; the 

 lamellae are rather narrow compared to other collections of H. monti- 

 cola; many of the basidia are slender and sterile; and the spores are 

 relatively few. If these are normal carpophores, which is doubtful, this 

 would be an odorless form of H. monticola. In another variant ( Smith 

 61839), although the spores measure up to 13.5 \x long, most of them 

 are 9-11 \x in length. In H. vinicolor the gills are distinctly colored when 

 young, and the stipe has a pruinosity which becomes pink. 



219 



Hygrophorus velatus, sp. nov. 



Pileus 1.5-3 cm lotus, convexus, pallido-rubicundulus, glaber, visci- 

 dus, margine aequo; caro alhida, odore et gustu mitis; lamellae decur- 

 rentes, pallidus ochraceae, paene subdistantes, modice latae; stipes 3-5 

 cm longus, 4-6* mm crassus, pallidus demum pallido-ochraceae, albo- 

 fibrillosus superne, siccus, aequalis; velum albo-fibrillosum, plenum; 

 sporae 5.5-6(7-8) X 3.5-4 \x, ellipsoideae demum sub-ellipsoideae. 

 Snecimen typicum in Herb. Univ. Mich.; ledum prope Burgdorf, 

 Idaho, Aug. 13, 1958, A. H. Smith 59968. 



Pileus 1.5-3 cm broad, convex, more or less expanding, very pale 



