384 SECTION HYGROPHORUS 



237 



Hygrophorus nigridius Pk. 



Torrey Bot. Club Bull. 22: 211. 1895 



Pileus 2.5-5 cm broad, fleshy, convex, obtuse or subumbonate, gla- 

 brous, viscid, grayish brown, often a little darker in the center. Context 

 white. 



Lamellae decurrent, distant, rather narrow, white. 



Stipe 2.5-5 cm long, 4-8 mm thick, rather slender, dry, solid, 

 brownish, white at the top. 



Spores (9)10-13 X (5.5)6-8 ll, ellipsoid, smooth, pale yellow in 

 Melzer's reagent. Basidia 48-65 X 7-12 /x, 2- and 4-spored, sterigmata 

 4-10 fx long, stout. Pleurocystidia and cheilocystidia none. Gill trama 

 divergent, hyphae 6-9 ll broad. Cuticle of radial, narrow (2.5-5 /a), ge- 

 latinous hyphae. No hypodermium differentiated. Clamp connections 

 present on the cuticle, not abundant. 



Habit, Habitat, and Distbibutiox — In pine and fir woods, Prince 

 Edward's Island, Canada, October-November. 



Matebial Studied — Canada: Peck (type, from Prince Edward's 

 Island, collected by J. MacSwain, October and November). 



Obsebvations — Although the macroscopic characters given above 

 are taken from Peck's account, the microscopic characters are based on 

 our study of the type. 



This species appears related to H. morrisii Pk. which, however, is 

 characterized by a conic-umbonate pileus, adnate to subdecurrent, 

 broad gills, and dingy-yellow stains at the base or nearly over all the 

 stipe. 



238 



Hygrophorus fuscoalboides, sp. nov. 



Pileus 5-7 cm latus, convexus demum planus, cinereus, viscidus; 

 lamellae subdecurrentes, alhae, subdistantes, latae; stipes 3.5-5 cm 

 longus, 8-10 mm crassus, cinereus, siccus, fibrillosus; sporae 9-13 X 

 5.5-7 fx. Specimen typicum in Herb. Univ. Mich, conservatum; ledum 

 prope Cape Horn Summit, Idaho, Aug. 25, 1954, Smith et Bigelow 

 46726. 



Pileus 5-7 cm broad, conic, becoming more or less plane, gray, 

 streaked, viscid. Context medium thick on the disc, thin on the mar- 

 gin; odor slight, taste mild. 



Lamellae subdecurrent, white, subdistant, broad. 



Stipe 3.5-5 cm long, 8-10 mm thick (apex), 20 mm (at base when 

 clavate), clavate or equal, gray, white above, with a thin coating of 



