KEJ'OKT OF THE STATE DOTANJST, I919 55 



17 Inocybe griseoscabrosa (Peck) Earle. In the original 

 description of this species in the 26th report, page 57, 1874, Feck 

 gives the spore measurements 8.75 x 5 micr. In this he was fol- 

 lowed by Massee (Ann. Bot., 18: 484, 1904) who says he examined 

 the type. Later, in his monograph, Peck corrected this manifest 

 error and gives the measurements larger. I have found them to be 

 10-12 (13) X 5-7 micr. The cystidia are thin-walled, scattered to 

 few on the sides of the gills, more abundant on edge, and as a rule, 

 broadly fusiform in shape. 



18 Inocybe infelix Peck. This is without doubt the American 

 form of I. 1 a c e r a Fr. of Europe. The species is very common 

 in this country, but our plants do not seem to have the reddish 

 fiesh of the stem which is said to be a characteristic of the European 

 plant. I. infelix is very variable. The peculiar lanuginose 

 covering of the pileus is readily affected by weather conditions, and 

 hence a more or less scaly pileus is often met with. The spores are 

 characteristic but quite variable in length. As far as I know, no 

 other species of Inocybe has just such spores, and the species 

 could be segregated on spore-lengths, if one did not take into account 

 the plasticity in their nature. In shape, they are elongated-cylindrical 

 or slightly narrowed one way, and frequently are subtruncate at one 

 end. Peck first gave the length as 10-12^ micr. (32d report, 

 p. 29, 1879) ; later in the monograph he increased this to 10-15 micr. 

 In an examination of over seventy-five collections from all parts 

 of the country, I found considerable variation. Evidence points to 

 the age of the plants at time of collection, restrictive effect of sudden 

 dry v/eather, and perhaps other influences, as the causes of a shorter 

 spore-size in some collections. Ten to 13 micr. is the most common 

 length; 10-15 micr. is frequently met with, and in frequent observa- 

 tions, even longer spores are scattered in the mount, ranging up to 

 20 micr. in length. The size of the spores of I . infelix can then 

 be indicated thus: 10-13 (15, 18, 20) X4-5J/4 (6). A collection of 

 1 . 1 a c e r a Fr. from Sweden, yielded spores of the same shape, 

 measuring 12-15 (20) x 5-6 micr. and Bresadola (Fungi of Poland, 

 Ann. Myc, i : 70) gives the spores of I . 1 a c e r a Fr. as 1 1-16 x 4-5 

 micr. The cystidia of both European and American plants are of 

 the thin-walled type. Bresadola (1. c.) would refer I. lac era Fr. 

 to I. cristata Scop. 



22 Inocybe violaceifolia Peck. One of the rare species. Its 

 limitations are not yet known, but it is without doubt distinct from 

 I. cincinnata Fr. and I. obscura Fr. of Europe. Only a 



