98 Journal of the Mitchell Society [December 



13. Collybia conigena Fr. 



Plates 17 and 23 



Cap about 1.5-20 mm. broad, about 270 [jl thick, very nearly plane, 

 but with a slight depression in the center, the edge turned up slightly 

 in older specimens, surface glabrous, light brownish-tan, or the center 

 pinkish, minutely pubescent. Threads of flesh very irregular and 

 knotty. 



Gills almost white with a brownish tinge, nearly or quite free, some 

 branched, quite narrow toward the margin. Threads of gill flesh 3.7 \x 

 thick. 



Stem about 2.5-5 cm. long, very pale, lighter in color than the 

 cap or gills, minutely pubescent (velvety) at maturity above and with 

 long white hairs at the base which attach it to the cone. These 

 threads are very long and conspicuous rhizomorphs that look like 

 stiff cotton threads and are very peculiar. They may extend from 

 as much as the lower third of the stem. 



Spores (of No. 3503) white, extremely minute, oblong, about 1.5-2 

 X 3-4 [x. Basidiaabout 3.7 [JL thick and 13 [i long. Cystidia only on 

 margin of gills, 6.6-9.3 [j. at thickest part, about 15-25 ^ long. 



Easily recognized from its habit of growth on pine cones. While 

 C. esculenta and C. conigena are said by Bresadola to have much larger 

 spores, this is not borne out by the more recent European monographs. 

 Lange (1. c. p. 18), Ricken (1. c. p. 414), and Sartory and Maire (1. c. p. 

 176) all describe the spores to be substantially as in our American 

 plants. Their creeping stems which are hairy on the rooting portion 

 could not separate our plants. It is only in the spores that a marked 

 difference appears. Collybia esculenta is listed by Schweinitz from this 

 state. For comparison of this and C. conigenoides, see the latter species. 



84. On pine cone, October 20, 1911. 

 2948. On cone of Pinus echinata, October 1.5, 1917. 

 3503. On decaying pine cones, October 25, 1919. 



Asheville. Beardslee. 



Low district, rotting pine cones. Curtis. 



14. Collybia conigenoides Ellis. 



Plates 18 and 23 



Cap 3-15 mm. broad, convex then nearly plane, at times depressed 

 in center, striatulate, very finely pubescent, a little viscid, buff in 

 center, paler toward margin; the cap surface composed of large 

 swollen cells through which project the short hairs which are about 



