360 FUNGUS-FLOEA. 



undulate, pruinose above, floccose below, but becoming at 

 length smooth, and shining, fistulose ; spores. 



Aqaricus (Psathi/ra) Gordoui, B. & Br., Ann. Nat. Hist., 

 n. 922, pi. XV. fig. 7; Cke., Hdbk., p. 216; Cke., lUustr., 

 t. 580 A. 



On old stumps. Usually fasciculate, smell strong, dis- 

 agreeable. When young the whole of the plant is covered 

 with white floccose fibrils. 



Psathyra helobius. Kalchbr. 



Pileus submcmbranaceous, 1^ in. across, conico-cam- 

 panulate, then almost plane, with concentric elevated ridges, 

 radiately rugose, subumbonate, sooty-brown, the striate 

 margin brown, hygrophanous, pale Avith a reddish tinge 

 when dry ; gills adnate but slightly rounded behind, rather 

 crowded, sootj'-brown ; stem 3-4 in. long, 2 lines thick, 

 equal, rather flexuous, reddish-umbei*, covered with fugacious 

 whitish squaniulcs, paler and reddish when dry, hollow ; 

 spores elliptical, ends rather acute, 12 x 6 /u,. 



Agaricus (Psathyra) helohius, Kalchbrenner, Icon. Hym. 

 Hung., p. 31, tab. 17, fig. 4; Cke., Hdbk., p. 216; Cke., 

 lllustr., pi. 579. 



Damp places in woods. 



Spores quite black when seen in the mass on a white 

 ground, hence the species is technically a Psathi/rella, but the 

 whole habit and the stem clad with white fibrillae point 

 to Psathyra, and more especially to Psathyra fihrillosa. 

 (Kalchbr.) 



Psathyra pennata. Fr. 



Pileus about 1 in. across, submcmbranaceous, campanulate, 

 obtuse, even, pale ochraceous, disc brownish, covered with 

 white plumose squaniulcs, then naked; gills adnexod, 2-3 

 lines broad, crowded, livid then blackish-brown; stem about 

 2 in. long, 2-3 lines tliick, silvery white, villose, rather 

 mealy at the apex, hollow. 



Agaricus (Psathyra) peniiatKS, Fries, Syst. Mvc. i. p. 297 ; 

 Cke., Hdbk., p. 216; Cke, lllustr., pi. 580 b. 



On naked soil. 



Somewhat resembling Coprinus cinereus, livid white, stem 

 usually short, but sometimes elongated. Margin of pileus 

 sometimes appendiculate. 



