Fungus Flora of ML Hood 137 



tubular, ''raw umber" (R.) except the yellowish apex, covered 

 with a ferruginous pruinosity which is denser at base, even, 

 "mars yellow" within. Odor none; taste tardily nauseous, at 

 length definitely so. Spores minute, narrow, subcylindric, 5-6 

 (7) X 1-1.5 ix, smooth and hyaline; cystidia none; basidia 24 x 

 5-6 fx; pileus corticate, the surface layer of thick- walled brown 

 cells. 



On decayed wood in conifer forest. Gregarious or scattered. 

 Mt. Hood, Oregon. September 28. Collected by C. H. Kauffman. 



Marasmius umbilicatus, sp. nov. — Pileus 2-4 cm. broad, 

 slightly fleshy, at very first pale pinkish buff, soon milk-white, 

 deeply umbilicate, radiately rugose- wrinkled, glabrous, margin 

 membranous, at first incurved and white pruinose on edge, then 

 repand; flesh concolor. Gills subdecurrent, arcuate, narrow, 

 acuminate at ends, close to subdistant, intervenose, becoming 

 crisped, whitish. Stem 3-5 cm. long, 2-3 mm. subequal, dilated 

 at apex, tough-cartilaginous, hollow, irregularly compressed and 

 longitudinally furrowed, dark fuscous, darker at base, pallid at 

 apex, glabrous except the scurfy apex, with brownish tomentum 

 at base. Odor and taste none. Spores narrow, elongated- 

 pointed at one end, 9 10 x 3-3.5 fx; cystidia scattered on sides 

 and edge of gills, subfusiform-acicular, about QO X 7 fx. 



Attached to fir needles and debris in fir and hemlock forests. 

 Rather frequent in the mountains of Oregon and Washington. 

 October 5. Collected by C. H. Kauffman. 



This has the general appearance of M. deledans of the Eastern 

 United States, but the pileus is deeply umbilicate, the gills are 

 subdecurrent, the spores of a different shape and it grows in a 

 different habitat. 



Mycena acicula Fr. Mycena ludea Fr.-Ricken 



Mycena amicta Fr.-Ricken Mycena pelianthina Fr. 



Mycena ammoniaca Fr. Mycena pura Fr. 



Mycena clavicularis Fr. Mycena rosella Fr. 



Mycena epipterygia Fr. Mycena rubromarginata Fr. 



Mycena haematopoda Fr. Mycena vitilis Fr. 



Mycena inclinata Fr.-Ricken Mycena vulgaris Fr. 



