296 THE AGARICACEAE OF MICHIGAN 



mycelium. A constant peculiarity of the plant seems to be the 

 clusters of stellate crystals which are scattered among the basidia 

 as seen under the microscope. 



286. Pholiota aegerita Fr. 



Epicrisis, 1836-38. 



Illustrations: Gillet, Champignons de France, No. 524. 

 Cooke, 111., Plates 453, 365. 



PILEUS 4-7 cm. broad, convex then plane, margin at length 

 elevated, fragile, moist, glabrous, disk subrugulose, ochraceous-yel- 

 low to fulvous, paler on margin, edge even and thin. FLESH not 

 thick, Avhite. GILLS adnate, decurrent by a tooth, rather close, 

 broad, whitish at first, then grayish fuscous, finally umber. STEM 

 8-12 cm. long, 4-8 mm. thick, slender, equal or slightly thicker at base, 

 fibrillose-striate, floccose at base, stuffed then hollow, whitish. AN- 

 NULUS whitish, membranous, rather thin, sometimes disappearing. 

 SPOKES obscurely 5-angled, i. e. truncate at one end, subacute at 

 the other, 9-11 x 5-6 micr., fuscous umber. CYSTIDIA scattered, 

 ventricose, obtuse at apex, about 65-70 micr. long. 



(Dried: Pileus fulvous-tan; gills fuscous-umber; stem dingy 

 buff). 



Caespitose. Among debris in low grounds, poplar, willow, etc., 

 edge of hemlock woods. Houghton. July. Rare. 



The figures and description given by Gillet fit our plant well. 

 The spores agree with the size given by Ricken and Bresadola. The 

 caespitose habit, uneven pileus and slender, IioHoav stem character- 

 ize it. It doubtless varies more as to form than my specimens indi- 

 cate, and Cooke has given very aberrant examples in the figures 

 cited. The peculiar outline of the spores is shown also in P. aceri- 

 eola and P. hoiveana. The flesh is very moist, almost hygropha- 

 nous, but in other respects differs from the section of hygrophanous 

 species. It approaches P. acericola, which has slightly smaller 

 spores and a large, persistent, curtain-like annulus, and is solitary 

 or gregarious. Fries says the annulus is tumid, in which respect 

 our specimens differ. Harper figures a plant under this name, 

 which reminds one of a discolored form of P. aeruginosa Pk. Ric- 

 ken says it has a strong, rather pleasant odor. 





