58 NEW YORK STATE MUSEUM 



spores is about the same in the two species, 7-1 1 (12) x 5-6 (7) 

 niicr., and both have the scattered, thin-walled type of cystidia. The 

 tubercles of the angular spores are not very distinct and often far 

 apart, and in undeveloped plants the spores may appear as if non- 

 nodulose. 



39 Inocybe decipientoides Peck. As in I , r a d i a t a the spores 

 of this species are angular-nodulose, generally narrower toward one 

 end, and variable in shape and especially in size ; they measure 9-1 1 

 (13) X 5-7 micr. with very manifest, obtuse, but scattered nodules. 

 The size, as given by Peck, is unsatisfactory. I . d e c i p i e n s 

 Bres. has angular spores without nodules. Peck tried to refer 

 some specimens received by him to I.decipiens, but all these 

 collections have distinct nodules on the spores and are to be con- 

 sidered I. decipientoides. This species was discovered by 

 Simon Davis in Massachusetts, and through his kindness I have 

 examined a number of collections. In one lot the spores exceeded 

 the size I have given, measuring up to 15 micr. long. This great 

 variability m.ust be considered an innate character of this species. 

 The pileus is somewhat squamulose, especially on the umbo. 



42 Inocybe subexilis Peck. A small species of good standing. 



43 Inocybe paludinella Peck. This was referred by Massee to 

 I. trechispora Berk. The type material, as Peck has already 

 pointed out in the monograph, shows that there is no basis for this 

 synonymy except the similarity of the spores. The stature of I . 

 paludinella is entirely different, the stems are long and slender, 

 the pileus is not viscid and the cystidia are lanceolate, rather long, 

 while in I. trechispora they are short and obese. 



44 Inocybe fallax Peck. The size of the plants varies consider- 

 ably. Usually only a fev/ specimens occur in a place, and often they 

 run smaller than is typ'cal. Peck gives the size of the pileus 2.5-5 

 cm but I have seen collections where the pileus measured up to 7 cm. 

 The spores of the smaller, mostly poorly developed plants do not 

 surpass 7-9 x 5-7 micr., but in luxuriant and well-developed plants 

 they are 7-10 fii) x 5-8 (9) micr.. subsphaeroid to subrectangular 

 in outline, with distinct irregular nodules ; *he figures of the spores. 

 given by Peck (Plate O, N. Y. State Mus. Bui. 75) are unsatisfactory 

 and do not show the variation in shape. The plants dry whitish, 

 v/hile I . i n f i d a Peck becomes brown. The cystidia are very 

 obese. Its nearest European relative seems to be T . u m b r a t i c a 

 Quel. (I. commixta Bres.), which apparently differs only in its 

 solid stem and perhaps the cystidia. The nature of the stem should 

 always be noted in the fresh plants. 



