North American species of Mycena.

EXCLUDED AND DOUBTFUL SPECIES

487

roughened cells forming the cuticle of the pileus are very decidedly
a character of one group of species in Marasmius-those designated as
Androsaceus by Patouillard.
Mycena nobilis (Pk.) Murrill, North Am. Flora, 10: 191. 1917.
Bolbitius nobilis Peck, Ann. Rep. New York State Mus., 24: 71. 1872.
Mycena palustris (Pk.) Saccardo, Syll. Fung., 5: 282. 1887.
Agaricus paluster Peck, Ann. Rep. New York State Cab., 23: 82. 1872.
Agaricus leucomyosotis Cooke & Smith in Cooke, Grevillea, 13: 57. 1885.
Collybia leucomyosotis Saccardo, Syll. Fung., 5: 220. 1887.
Prunulus paluster Murrill, North Am. Flora, 9: 331. 1916.
Collybia palustris Smith, Pap. Mich. Acad. Sci., Arts, and Letters, 21:
148. 1936.
Lyophyllum palustre Singer, Rev. de Mycol., 4: 65. 1939.
Tephrophana palustris Favre, Bull. Soc. Myc. Fr., 55: 204. 1939.
Illustrations:
Peck, Ann. Rep. New York State Cab., 23, pl. 5, figs. 6-11.
Smith, Pap. Mich. Acad. Sci., Arts, and Letters, 21, pl. 18.
If the genus Lyophyllum is to be recognized the combination
given by Singer is the correct one to use.
Mycena plumbeibrunnea Murrill, Mycologia, 8: 221. 1916.
Prunulus plumbeibrunneus Murrill, North Am. Flora, 9: 338. 1916.
"Pileus convex, gregarious, 1.5-9 cm. broad; surface smooth,
glabrous, opaque, pale-lead-brown, lighter near the margin, which is
somewhat crenate and appressed when young: context cream-colored,
without characteristic taste or odor; lamellae sinuate, rather distant,
inserted, broad, ventricose, cream-colored: spores oblong-ellipsoid,
smooth, hyaline, 7-9 X 4-5 A: stipe cylindric, smooth, glabrous,
concolorous with the margin of the pileus, hollow, 4-6 cm. long, 1-2
mm. thick.
"Type collected among decaying pine needles at Stanford University, California, December 6, 1901, C. F. Baker 168 (Herb. N. Y.
Bot. Gard.).
"Distribution: Known only from the type locality."
The type specimens are very poorly preserved. The spores
measure 7-9 X 5-5.5,u and are weakly amyloid. The cystidia are
abundant in some caps and rare in others, but they revive very poorly