98 THE CHICAGO ACADEMY OF SCIENCES 



In mulching under shrubs in a garden, Wheaton. June. 

 Very ephemeral, withering away if carried in the hand a few 

 minutes. Pileus in our specimens 4 to 8 mm. broad, lamellae 

 at first whitish, soon fuscous-black; spores large, ellipsoidal, 

 12 x 6 fx. 



PANAEOLUS. 



Veil woven, often wanting; stem polished, slightly firm; 



pileus slightly fleshy, not striate, the margin exceeding the 



lamellae; lamellae ascending into the top of the cone, variegated, 



deliquescent; stem fleshy; spores black. Usually growing on 



dung. 



Stem solid P. solidipes. 



Stem hollow 1 



1. Pileus liinist 2 



1. Pileus dry. , 3 



2. Reticulated with raised ribs, grayish. I', retirugis. 



2. Not reticulated, bay-red.. . . I', digressus. 



3. Pileus smooth, not zoned.. P. papilionaceus 



3. Pileus zoned near the margin /'. fimicola. 



Panaeolus solidipes Pk. 



Pileus firm, hemispherical becoming convex, smooth, whitish, 

 the cuticle at length breaking up into dingy-yellowish rather 

 large, angular scales. 



Lamellae broad, slightly attached, whitish becoming black. 



Stem firm, smooth, white solid, slightly striate at the top. 

 Spores very black with a bluish tint. Plant 12 to 20 cm. high; 

 pileus 5 to 7.") cm. broad; stem 4 to s mm. in diameter. The 

 upper part of the stipe is sometimes beaded with moisture. 



On a pile of horse manure, Wheaton, .May, 1905. The scales 

 are only exceptionally present upon "the pilei of our plants. The 

 surface, in old specimens is often cracked into irregular areas. 

 The portion of the stem which had been covered by the pileus 

 before expansion is thickly beaded with drops of moisture. The 

 upper third of the stem is distinctly striate, and sometimes the 

 striae can be traced all the way to the base. 1 find no record of 

 the size of the spores. They are ellipsoidal, and measure about 

 16 x 10 f i. 



This and P. epimyces (the latter doubtfully referred by Prof. 

 Peck to this genus), are the only species of Panaeolus with a solid 

 stem yet reported from the United State-. 

 Panaeolus retirugis Batsch. 



Pileus at first subglobose, at length hemispherical and broadly 

 subumbonate, reticulately veined, grayish-white, the margin 

 subfringed with the appendiculate veil. 



Lamellae broad, adnate, becoming grayish-black. 



Stem long, firm, hollow, pruinose. cartilaginous, smoky-gray, 

 light reddish-brown or paler. 



Pileus 12 to 24 mm. broad; stem 7.5 to 12.. 5 cm. high, 3 to 4 

 mm. thick. 



