North American species of Mycena.

GLUTINIPES: CAESPITOSAE

413

Hard, The Mushroom, Edible and Otherwise, fig. 94.
White, Conn. State Geol. and Nat. Hist. Surv., Bull. 15, pl. 11.
Pileus 1-4 cm. broad, obtusely campanulate when young, the
margin sometimes bent inward slightly, soon broadly campanulate
to convex, the disc sometimes finally slightly depressed, surface naked
or scurfy-pruinose at times, viscid, pellicle separable, shining in age
and glabrous, color brilliant reddish orange when young, becoming
paler and more yellowish ("mikado orange" to "cadmium orange"),
finally fading to nearly white, opaque or translucent-striate when
moist; flesh rather thick, watery-whitish beneath the orange pellicle,
pliant, odor subfarinaceous, taste slight and not distinctive; lamellae
adnate, becoming sinuate, broad, finally ventricose (5-8 mm.), close
to crowded, thickish at times, faces "light ochraceous salmon," readily staining orange yellow when bruised, edges brilliant reddish orange
and even; stipe 3-7 cm. long, 2-4 mm. thick, equal or flaring slightly
at the apex, even or transversely undulate, hollow, tough-cartilaginous, base densely strigose, covered with an orange scurfy pulverulence, glabrescent in age, viscid to lubricous, orange to yellow
over all or pallid near the apex, with a scant watery orange juice.
Spores 7-9 (10) X 5-6 y, ellipsoid, smooth, amyloid, basidia fourspored; pleurocystidia scattered to abundant, 32-46 X 8-13 u, with
a pale-orange content, ventricose and mucronate, smooth, sessile, or
pedicellate; cheilocystidia very abundant, 26-38 X 6-14 u, variable
in shape, fusoid-ventricose, clavate, subcylindric, or with one or more
knoblike protuberances on the upper portion; gill trama with a broad
central strand of more or less parallel hyphae which become reddish
brown in iodine, subhymenium broad, of narrow hyphae which gelatinize in KOH, nonamyloid; pileus trama covered with a thick
gelatinous pellicle, the hyphae of which contain a brilliant orange substance, homogeneous below, and vinaceous brown in iodine; stipe
with a thick gelatinous outer sheath, the cells with orange contents.
Habit, habitat, and distribution.-Cespitose on wood of various
hardwoods, throughout eastern and central United States and Canada.
In northern regions it occurs on the wood of the bog alder, Alnus
incana. I have not found it along the Pacific coast. I have examined
fresh material from North Carolina, Tennessee, Ohio, Indiana, Michigan, and Missouri in the United States and from Nova Scotia and
Ontario in Canada.
Material studied.-Smith, 32-80, 32-110, 32-572, 32-641, 33-366,