54 NEW YORK STATE MUSEUM 



I. caesariata has a tomentose-fibrillose covering when young 

 and this may be torn into ascending or recurved scales. 



11 Inocybe unicolor Peck. The non-variable subreniform, large 

 spores (9-12x5-6), and the paler ochraceous, whitish or grayish 

 ochraceous color of the pileus distinguishes this from its relatives. 

 The color fades and the dried specimens are dull or sordid whitish. 



12 Inocybe mutata (Peck) Massee. A good species, separable 

 from 1 . h y s t r i X by the lack of cystidia. It has the stature of 

 small specimens of I. calamistrata, but the base of the stem 

 is not blue or green. The spores measure 8-10 (12) x 5-5.5 (6) 

 micr. 



14 and 15 Inocybe fuscodisca (Peck) Massee. This is sepa- 

 rated with difficulty from I. agglutinata Peck in dried speci- 

 mens. Some of Peck's collections marked I. agglutinata 

 doubtless belong here. The cystidia are of the thin-walled type in 

 both, but somewhat aberrant in that the wall is often unusually thick. 

 The thickening, however, passes equally around the rounded apex 

 and the shape and their variability also indicate their tbin-walled 

 relationship. The spores average slightly larger in I. aggluti- 

 nata, and Peck has unduly emphasized this in the monograph. In 

 some specimens of I. fuscodisca the spores are scarcely more 

 than 9 micr. long, but in general, the spores may be said to measure 

 8-10 (11) X 5-6 micr., whereas those of I. agglutinata vary 

 from 8-12, usually 8-10 ( 12) x 5-6 micr. It appears, then, that we 

 must rely on the characters of the fresh plants. I have never, know- 

 ingly, collected either species. Peck says the pileus of I. fusco- 

 disca has a separable, viscid pellicle, while in I. agglutinata 

 it is covered with fibrils which appear agglutinated, but there is no 

 viscidity. He gives the size of the plants approximately the same, 

 but I suspect I. agglutinata, if distinct, averages larger. 



16 Inocybe leptocystis Atkinson. I have long knov/n this species 

 of Atkinson's. The cystidia tend to the shape of a cylindrical funnel 

 with slender stem, such as are used in chemical apparatus ; they are 

 more abundant than is usual in species with the thin-walled type of 

 cystidia. The pileus is bay-brown, silky, becoming slightly appressed- 

 scaly at times. The stem is pallid and solid ; the gills are crowded 

 and narrow. The spores measure 7-9 x 4-5 micr., smooth and sub- 

 elliptical. Three collections were found in the Peck herbarium ; they 

 were marked I. subochracea, I. rimosa and I . h i r - 

 t e 11 a respectively. 



