126 C. H. Kauffman 



European species, C. esculenta and C. conigena, have entirely glab- 

 rous caps. Lange (16) recognizes only C. tenecella and C. coni- 

 gena, and gives the larger spore-size to the former, the small 

 spore-size to the latter. Evidently Murrill is right in saying that 

 no typical material of these European species has as yet turned 

 up in America. C. albipilata occurs on various cones, although 

 usually reported only on pine cones. The other similar thing in 

 the United States is C. conigenoides Ell. on magnolia cones. 

 See Kauffman (11). 



COLLYBIA CONFLUENS Fr. 



CoUybia cylindrospora, sp. nov. — Pileus subpliant, 4-6(7) 

 cm. broad, convex-expanded and soon irregularly repand, ob- 

 soletely umbonate or obtuse, glabrous, even, moist, with a tough 

 cuticle, dull "antimony yellow" (R.), disk tinged "cinnamon 

 rufous"; flesh of equal thickness, 1-1.5 mm., white. Gills 

 broadly adnate, rather broad, narrowed in front to a point and 

 not reaching the edge of the pileus, subarid, slightly tough, 

 close, occasionally interveined, whitish. Stem 8-10(12) cm. long, 

 4-6(8) mm. thick, irregularly twisted, striate to furrowed-com- 

 pressed, hollow, glabrous, "cinnamon" (R.), sometimes darker 

 downwards, subrooting at base. Odor and taste slightly dis- 

 agreeable, earthy. Spores subcylindric, smooth, hyaline, 5-6 

 X 1.5-2 /ji] cystidia none; sterile cells on edge of gills filiform, 

 about 2 jjL wide; basidia 4-spored, 30 x 5-6 fx. 



On debris and very rotten wood in conifer forest. Mt. Hood, 

 Oregon. October 5. Collected by C. H. Kauffman. 



It is distinguished from its near relatives, like C. fusipes, C. 

 lancipes and C. distorta, especially by its narrow, cylindrical 

 spores. The stems are sometimes connate part way. Its general 

 appearance is like that of C. rugulosiceps. 



COLLYBIA PLATYPHYLLA Fr. 



CoLLYBiA PROLixA Fr.-Ricken 



CoLLYBiA PROTRACTA Fr.-Ricken 



Collybia rugulosiceps, sp. nov. (See Plate VI.) — Pileus 3-5 

 cm. broad, very pliant, convex-plane, with a distinct obtuse 

 umbo, at length depressed around umbo, moist, hygrophanous, 

 glabrous, radiately and finely rugulose to umbo, "cinnamon 



