68 SECTION CAMAROPHYLLOPSIS 



Pileus 1-3.5 cm broad, convex with an inrolled margin, becoming 

 plane or nearly so, viscid, hygrophanous, when young and fresh pale 

 vellow ("warm buff"), fading to pinkish buff (never white), translu- 

 cent-striate when moist and mature. Context thin but firm, unchanging 

 when bruised or in FeS0 4 ; odor faintly medicinal (but scarcely 

 diagnostic), taste mild. 



Lamellae decurrent, "cartridge buff" to "pale pinkish buff" (not 

 white), broad, distant, unchanging when bruised but gradually be- 

 coming more yellow in age. 



Stipe 5-7 cm long, 2.5-4 mm thick at the apex, surface dull white, 

 twisted striate in some specimens, equal to slightly narrowed down- 

 ward. 



Spores 7-9(10) X 4-5 /x, ellipsoid, smooth, yellow in Melzer's 

 reagent. Basidia 38-50 X 6-8 /*, 4-spored. Pleurocystidia and cheilo- 

 cystidia none. Gill trama intricately interwoven, hyphae 5-10 /x broad. 

 Pileus cuticle a medium to narrow gelatinous zone, 30-60( 100) /x thick. 

 Clamp connections on the cuticular hyphae. 



Habit, Habitat, and Distbibution — Gregarious at edge of bog 

 under lodgepole pine, Idaho, August. 



Matebial Studied — boaho: Smith 60169 (type, from Burgdorf, 

 Aug. 12, 1958). 



Obsebvations — This species obviously is related to H. niveus but 

 is distinctly colored. The spores of the two species are similar. It is also 

 related to H. berkeleyi Orton (1960) which has a whitish (ivory) 

 pileus when young and is only slightly viscid. 



16 



Hygrophorus berkeleyi Orton 



Trans. Brit. Mycol. Soc. 433: 259. 1960 



Pileus 3-6 cm broad, plane to slightly depressed with a decurved 

 margin, in age shallowly infundibuliform, surface glabrous, lubricous to 

 slightly viscid, dull white to cream color, pale dingy honey color on the 

 disc finally, the margin dull white and conspicuously striate, drying out 

 to whitish on disc and yellowish at margin. Context whitish, thin, 

 pliant, odor and taste not distinctive. 



Lamellae distant, decurrent, narrow to moderately broad, milk 

 white to pale cream color, edges even, drying whitish with dingy 

 ochraceous edges. 



Stipe 3-6 cm long, 4-6 mm thick, equal or enlarged either way, 

 naked over-all, dingy watery pallid to dull white, discoloring only 

 slightly in drying, base with appressed white mycelium. 



Spores 8-10 X 5.5 fx, subovate with a prominent oblique sterigmal 



