772 THE AGARICACEAE OF MICHIGAN 



brownish points on the stem, at other times they are easily visible. 

 These points are due to short, microscopic, dark, cystidia-like hairs. 

 Otherwise the stem is shining and whitish. When growing ou much 

 decayed wood the stem may be long, deeply rooting; when on the 

 ground it is scarcely more than attached by the spreading white 

 hairs and is shorter. In size G. floccipes reminds one somewhat 

 of G. alcalinolens 'and it grows in similar places, but it has no 

 odor and is not hygrophanous. 



822. Collybia conigenoides Ellis 

 Torr. Bot. Club Bull., Vol. 6. 



PILEUS small, 1-5 mm. broad, convex then plane, pellucid-stri- 

 ate, dingy cream-colored or tinged tan, covered by a minute pub- 

 escence (under a lens). FLESH thiu, white. GILLS slightly ad- 

 nexed or free, close to subdistaut, medium broad, whitish, becoming 

 yellowish, edge minutely pubescent. STEM filiform, 2-3 cm. long, 

 delicate, minutely pubescent under a lens, attached at base by 

 small rooting white hairs, white. SrORES minute, oblong, smooth, 

 4-5 x 2-3 micr., white. CYSTIDIA mostly on edge of gills, lance- 

 olate, 25-35 micr. long. 



On half-buried cones of white pine. New Richmond. Septem- 

 ber. Rare. 



Peck has described a similar species growing on cones, which he 

 called ('. albipilata. It has the same kind of spores and cystidia 

 as our species. It is said to be larger with an 8-12 mm. pileus 

 which is brown. In other respects ('. albipilata is like G. coni- 

 genoides. I suspect G. albipilata is merely a luxuriant form. 

 Cystidia are apt to vary somewhat in large and small plants. Two 

 European species which grow on pine cone» have been critically 

 discussed by Bresadola. They are G. esculenta and G. conigena. 

 Their spores measure 6-8x3-4 micr., and hence our plant cannot be 

 referred to them. Their size is also markedly different, the 

 pilei being 1-3 cm. across. Their stems are long, creeping and 

 rooting, and are covered on the rooting portion with a fibrillose 

 (omentum. 



