1921] The Collybias of North Carolina 105 



seems near C. nigrodiscus Pk. I am inclined to think this is the plant 

 listed by Curtis as M. plancus, Fr,, which has a similar habit and size 

 and has a hollow stem, but M. plancus differs in its narrower gills and 

 downy stem, and in absence of lilac tints. In size, shape, and thick- 

 ness of flesh, Mycena Zamurcfisis Pat. and Gail, from Venezuela (Bull. 

 Soc. Myc. Fr. 3: pi. 8. 1887) recalls our plant, but is excluded by the 

 absence of lilac tints and differently shaped spores. I have looked 

 through the Curtis herbarium under Marasmius and Collyhia but could 

 find nothing like this. 



1752. In damp shaded spot in soil among weeds and grass, woods at foot of Lone 

 Pine Hill, September 12, 1915. 



1818. One plant. On dry shaded path in Arboretum, northeast side, September 

 17, 1915. Stem eccentric; gills almost triangular, wide in center, pointed 

 at stem and just reaching it, distant, veined at cap, rather light brown- 

 ish-drab with a tint of lilac. Stem granular-pruinose above, smooth 

 elsewhere, tough, 2.5 cm. long, hollow; cap 3.5 cm. wide. 



2193. Woods below rock wall, south of Peabody building, June 21, 1916. Cap 

 about 3 cm. broad, strongly convex, umbonate, smooth, appearing 

 slightly tomentose under a lens, hygrophanous, fleshy-buff color, darker 

 in center; margin thin, even, becoming brownish-lilac. Spores white, 

 smooth, elliptic, pointed at one end, 3.7-4.4 X 5.5-8ix. 



2810. Among shrubs near wall, east side of Arboretum. 



3288. Under Magnolia in Arboretum, June 4, 1919. 



3290. Under Magnolia soulangeana in Arboretum, June 4, 1919. Fine plants, up 

 to 6.5 cm. in diameter. Painting. 



4331. Under shrubs in Arboretum, June 24, 1920. Spores variable, smooth, el- 

 liptic, 4-5.5 X 6-9m. 



22. Collybia clusilis Fr. (sense of Schroeter) 

 Mycena palustris (Pk.) Sacc. 



Cap up to 1 cm. broad, very smooth, convex, not umbonate or 

 umbilicate, brownish-olive or buffy-brown (Ridgway), paler when 

 young, very thin and delicate but not striate. 



Gills pale yellowish-brown, distant, slightly decurrent, not sinuate, 

 less than 1 mm. wide, only about 20 to 25 in number and a few short 

 ones. 



Stem slender, about 3 cm. long, color of gills, smooth, hollow, 

 extending deeply into the moss and there covered with mycelial 

 strands. 



Spores white, subspherical to eUiptic, smooth, 3.5-6 x 4-9 [i. 



This very pretty little plant seems to be confined to thick beds of 

 moss. 



