94 SECTION CAMAROPHYLLOPSIS 



37 



Hygrophorus pseudopallidus, sp. nov. 



Pileus 2-4 cm latus, "pale ecru-drab," demum cineraceus, subvisci- 

 dus; lamellae decurrentes, luteae, latae; stipes 3-4.5 cm longus, 4-6 mm 

 crassus, albus, basi subflavus; sporae 5-7 X 4-5 \x, subglobosae vel subo- 

 voidae. Specimen typicum in Herb. Univ. Tenn.; ledum in Cades 

 Cove, Great Smoky Mts. National Park, Tenn., June 8, 1957, Hesler 

 14439. 



Pileus 2-4 cm broad, convex, expanding-convex, subviscid, "pale 

 ecru-drab'' when young, paler ( grayish, not matched ) at maturity, in- 

 nately appressed-silky, faintly ridged radiately. Context thin, rather 

 brittle-fragile, whitish or pallid; odor mild, taste slightly astringent. 



Lamellae arcuate-decurrent, "ivory yellow," venose at cap, broad, 

 tapering at both ends, subdistant or nearly distant, thin, edges even. 



Stipe 3-4.5 cm X 4-6 mm, glabrous, striate, white-shining, basal 

 third tinged yellow, spongy, fragile. 



Spores 5-7 X 4-5 /x, subglobose to subovoid, rarely ellipsoid, 

 smooth, apiculate, white in mass, yellowish in Melzer's reagent. Basidia 

 40-60 X 6-9 fx, 4-spored. Pleurocystidia and cheilocystidia none. Gill 

 trama interwoven, hyphae 3-7 fx broad. Cuticle a thin gelatinous zone 

 25-50(100) fx, hyphae more or less erect to repent, 2-4 /x broad. No 

 hypodermium differentiated. Pileus trama of radial, subparallel to 

 slightly interwoven hyphae. Clamp connections on hyphae of cuticle, 

 subhymenium and gill trama. 



Habit, Habitat, and Distbibution — On soil, in pine woods, Ten- 

 nessee, June. 



Matebial Studied — Tennessee: Hesler 14439 (type, in pine woods, 

 Cades Cove, Great Smoky Mts. National Park, June 8, 1957), 23760 

 (same station, June 28, 1960). 



Obsebvations — This species belongs in the pratensis-cinereus- 

 lacmus complex. Except for its ivory yellow gills, it closely resembles 

 H. lacmus as illustrated by Lange (1935-40) pi. 165, fig. B. Similarly it 

 appears to be related to cinereus, and to H. pallidus, but these two en- 

 tities, like H. lacmus, have grayish gills. 



38 



Hygrophorus pallidus Pk. 



Torrey Bot. Club Bull. 29: 69. 1902 



Camarophyllus pallidus (Pk.) Murr., North Amer. Flora 9: 386. 1916. 



Illustration: 



Kauffman, Agar. Mich., pi. 29 (above). 



