126 SECTION HYGROCYBE 



Observations — The prominent green color of the stipe and more 

 pronounced olive color of the cap distinguish the variety from the 

 species. The habitat may also be distinctive, but more information is 

 needed. 



60 



Hygrophorus marginatus Pk. var. marginatus 



N. Y. State Mus. Ann. Rept. 28: 50. 1878 



Hydrocybe marginata (Pk.) Murr., North Amer. Flora 9: 378. 1916. 

 Tricholoma marginatum (Pk.) Singer, Mycologia 35: 154. 1943. 

 Humidicutis marginata (Pk.) Singer, Sydowia 12: 225. 1958. 



Illustrations: 



Fig. 33; also 7h. 



Kauffman, Agar. Mich., pi. 31. 



Smith and Hesler, Lloydia 5, pi. 5. 



Pileus 1-5 cm broad, obtusely conic, then convex or campanulate, 

 sometimes plane or with a low obtuse umbo, in age occasionally 

 lacerate-squamulose or rimose, "deep chrome," "cadmium yellow," 

 "zinc orange" to "orange" or with a tinge of olive when moist, fading to 

 pale yellowish or nearly white, at first glabrous, moist and hygropha- 

 nous, at times lubricous, margin at times faintly striatulate. Context 

 thin, waxy, fragile, concolorous with the surface; odor and taste mild. 



Lamellae arcuate-adnate, soon adnexed, sometimes emarginate, 

 seceding in age, "Mikado orange," "deep chrome" to "orange chrome" 

 (brilliant orange), color usually persisting at least on the edges, broad 

 and ventricose, subdistant, intervenose, edges even. 



Stipe 4-10 cm long, 3-6 mm thick, "warm buff" to "pale orange- 

 yellow," equal or slightly ventricose, curved or flexuous, dry, terete or 

 compressed, fragile, glabrous, moist, not viscid, soon dry, hollow. 



Spores 7-10 X 4-6 ^, ellipsoid to suboblong, smooth, white in 

 deposits, pale yellow in Melzer's reagent. Basidia 31-58 X 6-9 /x, 2- 

 and 4-spored. Pleurocystidia and cheilocystidia none. Gill trama sub- 

 parallel to slightly interwoven, cells 10-100 X 8-20 /a, yellowish in 

 Melzer's reagent. Lactif ers rare in the gill trama, slender ( 2-3 \x broad ) . 

 Pileus trama homogeneous. Cuticle at first of repent hyphae, a cutis; 

 finally the surface hyphae loosen, and become more or less erect and 

 then form a type of trichodermium. No hypodermium. Pileus trama 

 radial, with scattered lactifers. Clamp connections absent. 



Habit, Habitat, and Distribution — Singly or gregarious on soil 

 and humus, in mixed woods, Maine, Vermont, Massachusetts, New 

 York, Pennsylvania, Maryland, Virginia, North Carolina, Tennessee, 

 Florida, Alabama, Kentucky, Michigan, Idaho, Oregon; also Canada; 



