REPORT OF THE SPATE (iOTANIST, I919 49 



highly differentiated spores in both cases, and on this account these 

 two species are not suited as a bridge from the smooth-spored to 

 the rough-spored species, a step more easily conceived by the sug- 

 gestion above that the simply angular spores represent this inter- 

 mediate stage of differentiation. I assume, also, that the simplest 

 type of pileus is represented by the V e 1 u t i n a e section, in the 

 sense of Fries, initiated in a simple Cortinarius type, and pass- 

 ing through the R i m o s a e and Lacerae to the Squarrosae 

 as the highest type of development in any branch of the genus. As 

 a parallel possibility, v^e can start v^ith the V i s c i d a e , represent- 

 ing a simple type of Hebeloma, and go up through the same 

 series. On this hypothesis, I have arranged below the species in the 

 Peck collections as a suggestion of possible phylogeny in the genus. ^ 



Synopsis 

 I Cystidia lacking 



A Spores smooth Connecting 



(o) Spores subellipsoid with Cortinarius 



Sect. V e 1 u t i n a e 



1 Inocybe subtomentosa Peck. Five New York collections. 



Sect. Lacerae 



2 Inocybe subdecurrens E. & E. (Syn. /. fomentosa E. & E.). 



Two New York collections ; also from Canada. 

 Sect. Squarrosae 



3 Inocybe marmoripes Atk. One New York collection. 



(b) Spores subreniform 



Sect. R i m o s a e 



4 Inocybe lanatodisca Kauff. One New York collection. 



5 Inocybe fastigiella Atk. (/. rimosa of Am. authors). Thirteen 



New York collections ; also from Missouri. 



6 Inocybe rimosoides Pk. Two New York collections ; also from 



Massachusetts. 



7 Inocybe fastigiata Schaeff-Bres. Four New York collections. 



Sect. Lacerae 



8 Inocybe squamosodisca Peck. Two New York collections. 



Sect. Squarrosae 



9 Inocybe lorillardiana Murr. (American form of /. dulcaniera 



A. & S.). Two New York collections; also from New Jersey 

 and Missouri. 

 ID Inocybe caesariata Fr. (Syn. /. fibrillosa Pk.). Three New 

 York collections; also from Minnesota and Missouri. 



'The two species from California, I. bakeri Pk. and I. bullosa Fr.. 

 are omitted for lack of data. 



