The North American species of Pholiota, by Alexander H. Smith and L. R. Hesler.

Smith * Hesler

67

of the pileus would seem to indicate stirps A urea. However, no disarticulation of the cells was noted. The caulocystidia are unique as known to
date in this subgenus, but need further study in relation to veil elements.
The diagnostic features of this species are the habitat on conifer
logs, the coarse pigment deposits on at least a fair number of the trichodermial hyphae and the large number of subglobose cells in many of the
hyphae, the cheilocystidia of the P. erinaceella type, and the broad subdistant gills. The conifer-inhabiting members of this section in North
America are rare and occur solitary. There are more than those described here, but our data on them are very incomplete.
Some might be inclined to regard P. subechinata as a synonym of
P. muricata but the latter is said to occur on beech, have a densely
fibrillose stipe below the veil-line, and nothing is said of the gills spotting
rusty as in Gymnopilus species. P. subechinata has a thin fibrillose veil
leaving only inconspicuous scattered patches on the stipe, the gills become rusty spotted, and the ornamentation of the pileus is not granulose.
Because of these possible differences we believe it wiser to consider the
conifer inhabiting fungus as a different species. It is readily distinguished
from P. granulosa by its cheilocystidia. In the latter they are mostly shortclavate to ovate.
18. Pholiota murrillii nom. nov.
Gymnopilus aromaticus Murrill, North Amer. Fl. 10: 203. 1917. (not
Pholiota aromatica Orton, 1960)
Illustrations: Text figs. 477-479.
Pileus about 3 cm broad, convex to expanded, surface conspicuously
floccose, areolate with age, yellowish-ferruginous margin lacking striae.
Context whitish, aromatic; taste like that of birch twigs.
Lamellae adnexed, crowded, rather narrow, yellow to bright ferruginous.
Stipe 2-3 cm long, 4 mm thick, cylindric, densely yellow-fibrillose,
chrome yellow, solid, hard, whitish within.
Spores 7.5-9.5 x 4-5 /u, smooth, apical pore minute and not visible
on all spores, shape in face view ovate to elliptic, in profile mostly more
or less bean-shaped; color in KOH more or less ochraceous tawny, not
appreciably different in Melzer's reagent; wall about 0.3 /i thick.
Basidia 24-30 x 4.5-7.5 F,, 4-spored, narrowly clavate, in KOH
lemon-yellow, duller in Melzer's reagent (yellow pigment diffusing
copiously in mounts in KOH). Pleurocystidia 26-35 x 3-7 p, present as
pseudocystidia, with dingy yellowish granular content (in Melzer's
mounts) and much granular to minutely granular material pervading
the mount and the content disappearing from the "pseudocystidia," in
KOH the content homogeneous. Cheilocystidia 28-42 x 4-9,L, versiform:
filamentous-subcapitate with a flexuous pedicel, slightly ventricose below