REPORT OF THE STATE BOTANIST I9I7 63 



form of C o 1 1 y b i a s t i p i t a r i a , approaching C v) 1 1 y b i a 

 z o 11 a 1 a ;■ indicalins^- that C . z o n a t a is only a form of C . 

 s t i p i t a r i a . Although the name, var. r o b u s t a , ante- 

 dates C o 1 1 y b i a c a m p a n e 1 1 a by seven years, the varietal 

 name can not be used in place of the specific name campanella, 

 according to article 49 of the International Rules of Botanical 

 Nomenclature, 27, 191 2. 



One of the collections received from the State Museum was 

 typical C o 1 1 y b i a s t i p i t a r i a , and is the only typical repre- 

 sentative of the species which I have seen in this country. It was 

 collected by E. Bartholomew (no. 2238) and determined by Peck 

 as C o 1 1 y b i a s t i p i t a r i a . The specimens were found grow- 

 ing on grass roots in a sandy pasture. Rooks county, Kansas, 

 August 30, 1896. They agree in all particulars with the specimens 

 in Rab. Fung. Eur. no. 107, referred to above. It is interesting to 

 note that the Kansas specimens were collected on grass roots in an 

 open field. Fries says of Agaricus stipitarius (Epi- 

 crisis 87. 1836), that it is abundant on the roots of grasses in fields, 

 but never in woods or mountainous regions. 



This raises the question as to the status of the rather common 

 form in the eastern United States, which grows in the woods on 

 twigs and leaves, and which goes quite generally under the name of 

 Collybia stipitaria. Peck's critical mind led him to 

 recognize this form as distinct from the Collybia stipitaria 

 of Europe and he named it Collybia stipitaria var. 

 setipes (38th Rep't N. Y. State Mus., p. 109. 1885). This 

 I regard as a distinct species. The plants are taller and more 

 slender than those of the two species treated above, ranging 

 from 5 to 10 cm high, the pileus 4 to 10 mm broad. The pileus 

 is pale gray to dark gray or umber. The lamellae are narrow 

 adnexed. The cystidia are very characteristic, abundant on the 

 edges of the lamellae and distributed for some distance on the sides, 

 at least half way to the pileus in the specimens examined, but they 

 do not project beyond the basidia. They are clavate with numerous 

 short processes over the distal end (6 to 8 or 10 or more) and are 

 15 to 20 X 6 to 9 /x. These cystidia are very similar to those present 

 in a number of species of Marasmius. The spores are 7 to 9 x 

 3 to 4 fi. 



There remains to be considered a fourth species, Colly b i a 



^A g r i c u s ( C o 1 1 3' I) i a ) z o n a t a Peck, 24th Rep't N. Y. State 

 Mus., p. 161. 1872. 



