SECTIOh HYGROTR Wl \ 10 I 



anous, color pearly gra) to drab, at times the center and one side ol 

 the pilous fuscous. Context almost concolorous with the surfaces, 

 fleshy, odor none, taste agreeabh farinaceous. 



Lamellae horizontal or descendant, broad, subdistani to distant, 

 light pearl gray, more or loss reticulate-intervenose. 



Stij)o 3-5 cm long, 9-10 mm at apex, narrowed to 3-4 mm at base, 

 solid, dry, innately longitudinally Bbrillose-striate, at times slight!) su 

 perficially Qbrillose. 



Spores 5-7 X 3.5-5.2 /*, oblong to ellipsoid, less often subglobose, 

 smooth, thin-walled, hyaline, inamyloid. 



Basidia 23-33 x 5.5-7 /m, 4-spored. Cystidia none on laces or edges 

 of gills. Subhymenium of small subcellular hyaline elements. ll\me- 

 nophoral trama more interwoven near junction with pilous trama, al- 

 most subparallel in places farther down, cells at times reaching 35 n 

 broad, some hyphae remaining narrowly filamentous. Pileus epicutis 

 an hymeniform to subhymeniform layer of hyaline to pale fuscous In- 

 flated elements lacking brownish pigment in lower portion or pedicel 

 Context hyphae beneath the hypodermium of more 1 numerous broad 

 elements as the lamellae are approached. Clamp connections present. 



Habit, Habitat, and Distribution — In open places, pastures. 

 meadows, sometimes under bamboo, or near plantations solitary or in 

 groups fruiting in the rainy season, Mexico and Trinidad. 



Material Studied — None. The descriptive data used above have 

 been adapted from Singer's original description. 



Observations — On the basis of Singer's description this appears to 

 be a well-defined species, close to H. hymenocephalus but differing in 

 color of the young basidiocarp and the more ellipsoid spores. 



45 



Hygrophorus hymenocephalus Sm. & Hes. 



Elisha Mitchell Sci. Soc. Jour. 56: 311. 1940 



ArmiUariella hymenocephala (Sm. & Hes.) Singer, Lilloa 22: 217. 



1951. 

 Camarophtfllus hymenocephalus (Sm. & Hes.) M. Lange, Friesia 4: 



1-2. 1950. 

 Hygrotrama hymenocephalum (Sm. & Hes.) Singer, Sydowia 12: 



222. 1959. 



Illustrations: 



Fig. 25; also 10b. 



Smith and Hesler, Elisha Mitchell Sci. Soc. Jour. 56, pi. 9 (above) 



Smith and Hesler, Lloydia 5, pi. 2b. 



Pileus .5-20(30) mm broad, convex to hemispheric, margin in- 

 curved, often becoming nearly plane, glabrous, hygrophanous, when 



