SI BSi CTION M1CROSPOR1 93 



Lamellae adnate or subdecurrent, white, slightl) arcuate, broad, 

 subdistant to close, venose, edges even. 



Stipe 2-5 cm long, 2-7 mm thick, concolorous with the pileus, 

 equal, compressed, glabrous, dry. hollow . 



Spores 4-5.5 \ 3-5 /». subglobose to short-ellipsoid, smooth, oon- 

 amyloid. Basidia 8£-47 x 5-6 /x, 2- and 4-spored. Pleurocystidia and 



cheiloC) stidia none, Gill traina interwoven, hyphae 3.5-5 /< broad, yel- 

 lowish in iodine. Cuticle at times a cutis, again almost a trichodennium 



| with scattered, more or less erect, septate h\ phae. the terminal ele- 

 ments cvstidioid, similar to //. microsporus) . No hypodermium differ- 

 entiated. Pileus trama homogeneous, hyphae radial, yellowish in io- 

 dine, (-lamp connections rare on the cuticular hyphae. 



Habit, Habitat, and Distbibutiox — On soil, in mixed woods. 

 Massachusetts, Pennsylvania, and Tennessee, Julv-September. 



Material Studied — Massachusetts: Davis (type, from Stow. 

 Sept. 16, 1907). Pennsylvania: Sumstine, Pittsburgh, Oct. 1942. TEN- 

 NESSEE: Sharp 12172; Smith, Great Smoky Mts. National Park. Aug. 30, 

 1938. 



Obsebvatioxs — The description above was drawn from No. 12172 

 which agrees well with the type. Notes on the type: Spores 4-6 X 

 3.5-4.5 /a, subglobose to short-ellipsoid, smooth non-amvloid ( Davis, in 

 his notes accompanying the type, says spores are white). Basidia 

 38-51 x 5-6 /x, 2- and 4-spored. Pleurocvstidia and cheilocvstidia none. 

 Gill trama interwoven, hyphae 2.5-4 /x broad. Cuticle of non-gelatinous 

 hyphae. Clamp connections rare on the cuticular hvphae. 



This species is related to H. albipes, but its lamellae are narrow 

 and white, the spores are larger, and the pileus is not hvgrophanous. 

 H. cremicolor has vellow lamellae. 



SERIES PELLICULOSI (Sm. & Hes.) stat. nov 



Subsection Pelliculosi Sm. & Hes., Lloydia 5: 15. 1942. 

 Pileus viscid; spores typically less than 6.5 /* long. 

 Type species: H. pallid us Pk. 



Key to Species 



1. Lamellae pale vellow 87. //. pseudopaUidus 



1. Lamellae smoky violaceous at first (see //. rainicrensis, page 64, also") . . 

 '. 38. H. paUidus 



