Fungus Flora of Mt. Hood 125 



cies are to be found with the — often abundant- — "multiplex" 

 plants. The photograph is of the intermediate type. E. T. 

 Harper in Mycologia, Volume 5, Plate 94, has illustrated what is 

 undoubtedly the same plant, and properly referred it to C. 

 clavatus. 



Cantherellus pruinosus Pk. — On debris under coniferous 

 trees. Although this determination may be open to question, 

 yet in the absence of any recorded microscopic characters for 

 Peck's species, it seems to me more than probable that we have 

 here the species so briefly described by him {N. Y. State Mus. 

 Rep., 28:51. 1876). Patouillard (18), in Tabulae Analyticae, 

 figured (No. 651) a species from Guinea, South America, of 

 which the slender specimens there shown well illustrate the size 

 and shape of our plant. That species, however, has different 

 spores and grows in the tropics. The western plant is white 

 throughout, 2.5 cm. tall, shaped like the slightly curved horn 

 of a cow, flaring slightly at the top, depressed-subinfundibuli- 

 form, and externally with narrow, longitudinal ridges; a few of 

 these may be forked. The spores are spherical, hyaline and 

 smooth; the basidia are 4-spored, elongated, subclavate 90-100 

 X 4 /z. 



COLLYBIA ACERVATA Fr. 



COLLYBIA ALBIFLAVIDA (Pk.) Kauff. Var. MONTANUM Kauff. 



CoLLYBiA ALBiPiLATA Pk. — On cones of Douglas fir. Com- 

 mon. This is without doubt Peck's species. However, it is 

 very likely to turn out to be only a somewhat smaller American 

 form of one of the European species. The idea of the spore-size 

 for C. esculenta and C. conigena as given by Bresadola (6), 

 6-8 X 3-4 fx, has not been followed by later European authors, 

 e.g. Ricken (20), Rea (19) and Lange (16). The spores of my 

 collection measure 3.5-4 x 2 fx, and the cystidia are ''fusoid- 

 ventricose," capitate. In this latter respect it agrees with Bresa- 

 dola's conception of C. esculenta. The pileus, however, is ''pale 

 cinnamon-pink" when fresh, becoming "pinkish-cinnamon" in 

 age, and is pruinose; this pruinosity is due to erect cystidia- 

 like cells projecting from the corticate surface layer of the pileus. 

 All this is distinctly a character of the American species. The 



