ISO SECTION HYGROCYBE 



63 



Hygrophorus stowelii, sp. nov. 



Pileus 1-2.5 cm lotus, nonnihil conicus, glaber, hygrophauus, 

 "Rood's brown" vel ferine "pecan brown," demum vinaceo- 

 sub-bruuueus, striatus; lamellae adnatae, vinaceo-brunneae, obscurius 

 rufo-brunneae siccae, angustae delude medio-latae; stipes 4—7 cm 

 longus, 2 mm crassus, obscuro-vinaceo-ciuuamomius sporae 5-6.5(7) X 

 3.5—4 ix, ellipsoideae, paulum inaequilaterales. Specimen tijpicum in 

 Herb. Univ. Mich.; ledum in Black Lake, Mich., E. Stowell, Aug. 7, 

 1961, Smith 63864. 



Pileus 1-2.5 cm broad, obtusely conic becoming broadly conic, 

 surface glabrous, moist, hygrophanous, dark vinaceous brown ( "Rood's 

 brown") or paler and near "pecan brown," fading to vinaceous tan in 

 streaks from the margin inward. Context very tender and brittle; odor 

 and taste not distinctive. 



Lamellae adnate, dull "Mikado brown" (vinaceous brown) and 

 drying a darker red-brown, thickish, narrow to moderately broad, 

 edges even. 



Stipe 4-7 cm long, about 2 mm thick, equal, dull vinaceous cin- 

 namon over all except for the whitish base, which is faintly mycelioid, 

 naked from the lower third to the apex. 



Spores 5-6.5(7) X 3.5-4 /*, elliptic in face view, slightly inequila- 

 terial to subelliptic in profile, smooth, non-amyloid. Basidia 4-spored. 

 Pleurocystidia and cheilocystidia none. Gill trama parallel. Epicutis of 

 pileus of non-gelatinous filaments 3-4.5 /x wide, hyaline in KOH. 

 Clamp connections present. 



Habit, Habitat, and Distbibutiox — Solitary in a Thuja swamp, 

 Black Lake, Mich., collected by E. Stowell, Aug. 7, 1961. 



Material Studied — Michigan: Smith 63864 (type). 



Observations — This species appears to be most closely related to 

 H. troy anus, but the latter has violaceous gills and a southern distribu- 

 tion. The color of pileus and gills is about like that in H. kauffmanii, 

 but the resemblance ceases at that point. 



64 



Hygrophorus acutoides Sm. & Hes. var. acutoides 



Sydowia 8: 325. 1954 



Illustration: 

 Fig. 34. 



Pileus 3-5 cm broad, obtusely conic with a straight margin, expand- 

 ing to broadly conic, in age some with an uplifted margin and low 



