North American species of Mycena.

182 NORTH AMERICAN SPECIES OF MYCENA

In order to avoid confusion I have gone back to a name based on a
type concerning which, in the restricted sense employed here, there
is no confusion. For a discussion and arrangement of the European
forms see Kiihner (1938), pp. 553-562.
83. MYCENA SUBINCARNATA (Pk.) Saccardo
Syll. Fung., 5: 262. 1887
Agaricus subincarnatus Peck, Ann. Rep. New York State Cab., 23: 83. 1872.
Prunulus subincarnatus Murrill, North Am. Flora, 9: 325. 1916.
Illustrations: Text figs. 17, no. 10 (p. 173); 18, nos. 1-2, 4.
Pileus 8-12 mm. broad, conic to convex, with the margin appressed
at first, becoming campanulate to convex, sometimes papillate on the
disc, or the disc depressed, surface glabrous and naked, moist, smooth,
translucent on the margin, pale bright or dull incarnate over all at
first, soon becoming paler and delicately yellowish around the disc,
whitish along the margin, the intermediate area remaining delicate
pink; flesh very thin and pinkish to white, pliant, odor and taste not
distinctive; lamellae ascending-adnate with a slight tooth, becoming
notched, moderately broad, subdistant, delicately rose color at first,
soon whitish, margin not differently colored; stipe 4-5 cm. long,. 1-1.5
mm. thick, equal, not fragile, glabrous above, base white-strigose,
tubular, white- or rose-tinted above, more or less grayish incarnate
below or sometimes grayish incarnate over all.
Spores 7-9 (10) X 4-5 u, ellipsoid, slightly but distinctly amyloid;
basidia four-spored; pleurocystidia abundant, fusoid-ventricose, with
acute apices, smooth, 40-62. X 7-12,u, hyaline; cheilocystidia either
similar to the pleurocystidia or somewhat clavate and with the enlarged portion smooth or more or less covered with short obtuse
projections, 98-37 X 6-13 (15) y, the contents of some with a smoky
tinge when fresh; gill trama homogeneous; hyaline to faintly brownish
in iodine; pileus trama with a distinct pellicle, the hyphae of which
bear numerous short projections, hypoderm differentiated, the remainder of fairly large cells, excretory hyphae present, 3-4.5 u thick,
iodine reactions not convincing (all parts hyaline to dull brownish).
Habit, habitat, and distribution.-Scattered on needle beds of white
pine during the fall months; New York and Ontario. Apparently it is
a very rare species.
Material studied.-Smith, 700, 710, 1107, 4250.
Observations.-Ktihner has arranged this species in the same series