62 NEW YORK STATE MUSEUM 



In order to determine the relation of Collybia campa- 

 nella to C. stipitaria, it was necessary to have for 

 examination reasonably typical examples of the European C. 

 stipitaria of Fries. The type of Agaric us scabellus^ 

 (Consp. Fung. 189, pi. 9, fig. 6. 1805) is probably not in existence, 

 and at the present time it is not feasible to attempt to get hold of 

 the type of Agaricus stipitarius Fries (Syst. Myc, 

 i: 138. 1821) from Upsala, even if that type has been preserved. 

 There are accessible, however, collections which, without any 

 reasonable doubt, may be accepted as typical of Agaricus 

 stipitarius Fries. These were collected by Th. M. Fries (son 

 of Elias Fries) in the region of Upsala, Sweden, on tufts of grasses, 

 September 1859, and distributed in Rabenhorst's Fung. Eur. no. 107 

 as Agaricus (Collybia) cauticinalis* I have exam- 

 ined the specimens of this collection in the Experiment Station 

 herbarium of the Agricultural College at Cornell University. 



The following synopsis presents the principal differential 

 characters in a comparison of the two species : 



Collybia campanella Collybia stipitaria 



Plants white to grayish brown. 



Pileus in age more or less plicate. 



Lamellae adnexed to free, broad, 

 ventricose. 



Cystidia (sterile cells) on edge of 

 lamellae, cylindrical to subfusoid. 

 clustered usually in densely packed 

 tufts, straight or flexuose, simple, 

 24 to 30 X 3 to 4 //, inconspicuous 

 or rare on the sides of the lamellae. 



Spores 7 to 10 X 4 to 6. 



Plants reddish brown tawny to mars 



brown. 

 Pileus in age not plicate. 

 Lamellae free, narrow, very thin and 



soft. 

 Cystidia (sterile cells) on edge of 



lamellae, cylindrical clavate, 

 , straight or flexuose, with i to 3 



or 4 short or blunt mucros which 



are themselves sometimes branched, 



12 to 25 X 4 to 7 M. 

 Spores 7 to 9 X 3.5 to 4.5 M. 



This diagnosis warrants the separation of Collybia campa- 

 nella as distinct from Collybia stipitaria. 



Lloyd reports Collybia campanella Peck in 1900 



(Mycl. Notes, 5 : 43, fig. 16) as Collybia stipitaria var. 



r o b u s t a . The specimens were growing " on fallen cedar limbs in 



a swamp," probably the white cedar (Thuja o c c i d e n t a 1 i s). 



They represent the large specimens. He considers his variety as a 



^\ccording to the International Rules of Botanical Nomenclature, 1912, 

 article 19, f ; the species name Agaricus stipitarius Fr. takes 

 precedence over Agaricus scabellus Alb. & Schw. 



*In Sumnia Veg. Scand.. 280. 1849, Fries employed Bulhnrd's name, 

 Agaricus caulicinalis (in DeCandollc Flora ^ Francaise 2: 192. 

 1805. Champ. France pi. 522, fig. i. 1790, text page 545- 1809), with a 

 typographical error in the spelling. It is very doubtful if Bulliard s plant JS 

 the same as Agaricus stipitarius Fries. 



