Leucosporae 



I. COLLY'BIA. 



A. SCORTEI. 



* Stem woolly or strigose at base. 



M. u'rens Fr. uro, to burn. Pileus 2-3 in. broad, unicolorous, 



pale yellowish, becoming pale, slightly fleshy, moderately compact at the 

 disk, even, but here and there scaly or cracked in wavy lines when dry, 

 smooth, the thin margin involute. Stem 2-3 in. long, 3 lines thick, 

 solid, composed of crisp tough fibers, rigid, equal, sometimes however 

 ventricose, % in. thick, everywhere clothed with white ftocci, pale, white- 

 downy at the base. Gills free, united behind, at length remote from the 

 stem, distant, tough, at first pale-wood-color, then brown. 



Gregarious, somewhat cespitose. Taste very stinging. The stem is 

 not strigosely sheathed at the base. Fries. 



In mixed woods. Frequent. June to September. 



A curious form occurred with the pileus turning very dark when full- 

 grown. B. and Br. POISONOUS. Worthington Smith has tested it 

 by accident. It produced headache, swimming of brain, burning in 

 throat and stomach, followed by severe purging and vomiting. Steven- 

 son. 



Gregarious or cespitose. Taste very pungent, a feature which sepa- 

 rates the present from M. oreades. Not coarsely tomentose at the base, 

 as in M. peronatus, but only downy. Massee. 



Spores 3X4/x W.G.S.; elliptical, 8x47* Massee. 



Pennsylvania, New Jersey, West Virginia. Mcllvaine. 



I have not known it to disagree with myself or friends. That it may 

 not agree with some persons is unquestioned. Collectors should care- 

 fully test it upon themselves. 



M. perona'tus Fr. pero, a kind of boot. Pileus 1-2 in. and more 



broad, light yellowish or pallid brick-red, then becoming pale, wood- 

 color or tan, at first fleshy-pliant, then coriaceo-membranaceous , convex 

 then plane, obtuse, flaccid, slightly wrinkled, even at the disk, at length 

 pitted, striate at the margin. Flesh white. Stem 2-3 in. long, 1-2 

 lines thick, stuffed, fibrous, tough, attenuated upward, at length hollow 

 and compressed, furnished with a bark, light yellow then pallid, cuticle 

 villous but separating and reddish when rubbed, somewhat incurved at 

 the base, where it is clothed with dense, somewhat strigose, yellowish or 



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