Report of the State Botanist. 155 



Agaricus cristatus, a. & S. 

 Crested Agaric. 



Pileus thin, camp'anulate or convex, then nearly plane, obtuse, at 

 first with an even reddish or reddish-brown surface, ihemuhite adorned 

 with reddish or reddish-brown scales formed by the breaking up of the 

 cuticle, the central part or disk colored like the scales ; lamellae close, 

 free, white ; stem slender, hollow, equal, smooth or silky-fibrillose be- 

 low the ring, whitish, annulus small, white ; spores oblong or yiar- 

 rowly subelliptical .0002' — .00028' long, .00012' — .00015' broad. 



Plant 1' — 2' high ; pileus .5' — 1.5' broad ; stem 1 — 2 ' thick. 



Grassy places and borders of woods. June — September. 



This species is easily known by its small size and the crested ap- 

 pearance of the white pileus, an appearance produced by the orbicular 

 unruptured portion of the cuticle that remaius like a colored spot on the 

 disk. The fragments or scales are more close near this central part and 

 more distant from each other toward the margin, where they are often 

 wholly wanting. The scales are sometimes very small and almost 

 granular. In very wet weather the margin of the pileus in this and 

 some other species becomes upturned or reflexed. 



The spores when viewed in one position appear as if truncated at 

 one end and acute or pointed at the other, in another position they 

 appear narrowly elliptical, the truncate end being slightly rounded. 

 The spores of A. Friesii are somewhat similar in shape but are a little 

 longer. 



The plant usually has a distinct odor. 



Agaricus rubrotixctus, Fh. n. sp. 



Red-tinted Agaric. 



Pileus thin, convex or nearly plane, sometimes slightly and broadly 

 umbonate, at first even with a reddish or pinkish surface, a little 

 darker and sometimes slightly rough on the disk, then adorned with 

 appressed scales formed by the breaking up of the cuticle ; lamellae 

 close, free, white or whitish ; stem hollow, equal or slightly thickened 

 at the base, smooth or slightly silky-fibrillose below the annulus, 

 whitish, the annulus well developed, membranous, white or pinkish, 

 persistent; spores subelliptical, uninucleate, .00035' — .00045' long, 

 .0002' — .00025' broad. 



Plant 1.5' — 3.5' high; pileus 1' — 2.5' broad; stem 2"— 3" thick. 



Thin woods and open places. July — September. Helderberg 

 mountains and East Worcester. 



