314 SECTION HYGROPHORUS 



difficult), narrow (3-4 mm), one row of short individuals, concolorous 

 with the pileus or a duller white, edges even. 



Stipe short, 3-4 cm long, 1-2 cm thick at the apex, base bulbous 

 when young, nearly equal in age, somewhat rounded beneath the 

 bulb, solid, white within, peronate to the apex of the bulb by a white 

 membranous sheath which terminates in a flaring submembranous to 

 fibrillose inferior annulus, white and silky above, annulus sometimes 

 evanescent, no gelatinous universal veil evident. 



Spores 8-10 X 4.5-5(6) /x, ellipsoid, smooth, pale yellow in Melzer's 

 reagent. Basidia 48-62 X 7-9 fx, 2- and 4-spored. Pleurocystidia and 

 cheilocystidia none. Gill trama divergent, hyphae 4-7 fx broad. Cuticle 

 of repent, more or less radial, gelatinous hyphae, at times appearing 

 a distinct gelatinous zone 125-300 /x thick, the hyphae 3-5 /x broad, an 

 ixocutis. Pileus trama of radially disposed hyphae. Clamp connections 

 present on the pileus trama hyphae. 



Habit, Habitat, and Distribution — Gregarious under conifers, 

 Washington, Oregon, Idaho, Colorado, Wyoming, and Michigan, 

 June-October. 



Material Studied — Colorado: Davidson, June 1956. idaho: Smith 

 44557, 44810, 55040; Smith & Bigelow 44684; Trueblood 58608. 

 Michigan: Smith 38581, 43890. Oregon: Smith 19655, 20041, 20125, 

 25032, 25033, 26689, 26992, 27639, 28125. Washington: Smith 14397, 

 (type, from Deer Park, Olympic Mrs., June 16, 1939), 14418. wyo- 



Fig. 97. H. subalpinus 



