North American species of Mycena.

354 NORTH AMERICAN SPECIES OF MYCENA

than incarnate gills at maturity. Both comment on not finding M.
galericulata distinctly cespitose. It is possible that Fries confused
M. galericulata and M. hemisphaerica, a situation which would explain
his accounts of the habit of the former.
172. MYCENA RADICATELLA (Pk.) Saccardo
Syll. Fung., 5: 275. 1887
Agaricus radicatellus Peck, Ann. Rep. New York State Mus., 31: 32. 1879.
Prunulus radicatellus Murrill, North Am. Flora, 9: 323. 1916.
Prunulus adirondackensis Murrill, ibid., p. 332.
Mycena adirondackensis Murrill, Mycologia, 8: 220. 1916.
Mycena subviscida Kauffman and Smith, Pap. Mich. Acad. Sci., Arts, and
Letters, 17: 184. 1933.
Illustrations: Plate 85; Text fig. 43, nos. 3, 5 (p. 349).
Pileus 1-2 (3) cm. broad, obtusely conic when young, becoming
campanulate to subexpanded, in age often with a broad umbo, margin
usually incurved slightly at first, soon straight and finally somewhat
recurved, striate, glabrous and shining, when wet subviscid from the
thin separable pellicle, appearing whitish but actually "deep olive
buff," disc distinctly grayish in young specimens but soon fading;
flesh thin but flexible and tough, white, no odor, taste mild to subnauseous; lamellae adnate or joined together next to the stipe to
form a collar, close, becoming subdistant when the pileus is broadly
expanded, intervenose, whitish or flushed very pale pinkish (not
stained) in age, edges pallid and entire; stipe 2-4 cm. long, (1) 2-3
mm. thick, equal or slightly thickened at the base, which is whitestrigose and usually furnished with a pseudorhiza, cartilaginous and
tough, terete, hollow, glabrous and polished, subviscid when wet (not
furnished with a gelatinous outer layer), whitish or pallid above, pale
olive buff below.
Spores broadly ellipsoid to subglobose, 6-8 X 5.5-7 b (8-9 X
5-7 u in the type), amyloid (reaction strong); basidia 30-34 X 7-8 A,
two-, three-, or four-spored; cheilocystidia clavate to subeapitate,
the enlarged portion covered with slender rodlike projections, tapered
below to a slender pedicel, 35-40 X 9-14 u; gill trama purplish red
in iodine (amyloid reactions very strong); pileus trama with a welldifferentiated subgelatinous pellicle, a distinct hypoderm, and the
remainder filamentous, all but the pellicle purplish red in iodine.
Habit, habitat, and distribution.-Scattered to gregarious or sub