North American species of Mycena.

484 NORTH AMERICAN SPECIES OF MYCENA

"Desc. Hymenii haec est structura: e cellulis constat breviter
clavatis inter quas prominent sporophora antheridiaque. Ilia autem
ad medium prosiliunt et apice sterigmatibus quaternis coronantur.
Haec vero apice attenuata, ea de causa fusiformia, eamdem cum
sporophoris longitudinem metiuntur. Sporae oblongae, hyalinae,
uni-binucleolatae, at nullo septo transverso divisae.
"Obs. Species Agarico puro Bull. affinis, sed lignicola, haud
terricola. Ab eodem insuper pileo laevi e lilacino colore post exsiccationem alutaceo-helvolo, centro depresso, haud umbonulato, lamellis
tandem a stipite ut in A. procero distantibus differre mihi summopere
videtur."
The species has not been recognized by American investigators.
A portion of Sullivant's no. 90 was found among Atkinson's material.
The spores were 5-6 X 3-4 u, and the abundant pleurocystidia were
similar to those of Pluteus cervinus.
Mycena luteoalba (Fr.) Quelet. Not sufficiently known.
Mycena ludea (Fr.) Ricken. Reported by Kauffman from Mt. Hood.
His specimens are apparently M. delicatella.
Mycena macrorrhiza (Berk. & Mont.) Murrill, North Am. Flora, 10:
191. 1917.
This is Bolbitius macrorrhiza Berkeley & Montagne, Mont. Syll.
Crypt., p. 133. 1856.
Mycena mexicana Murrill, Mycologia, 4: 73. 1912.
This is Bolbitius mexicanus Murrill, Mycologia, 4: 332. 1912.
Mycena myceliosa Murrill, Mycologia, 8: 221. 1916.
Prunulus myceliosus Murrill, North Am. Flora, 9: 338. 1916.
"Pileus rather large and firm, convex to plane, gregarious to subcespitose, reaching 2.5 cm. broad; surface dull-brownish varying to
whitish, moist, glabrous, striate, margin white, entire, appressed when
young: lamellae adnate or adnexed, narrow, crowded, white: spores
ellipsoid, pointed, smooth, hyaline, 5 X 3: stipe very long and
slender, cylindric, equal, smooth, glabrous, light-brown, mycelioid
at the base and arising from copious white mycelium, about 10 cm.
long, 1-2 mm. thick.