North American species of Mycena.

EXCLUDED AND DOUBTFUL SPECIES

Agaricus (Mycena) alliaceus. See Marasmius.
Agaricus (Mycena) aureo-squamosus Frost. Nomen nudum?
Agaricus (Mycena) esculentus. Reported by Schweinitz (1822).
Agaricus (Mycena) flavipes. Reported by Schweinitz (1822).
Agaricus (Mycena) hypnorum. Reported by Schweinitz (1822).
Agaricus (Mycena) integrellus. Reported by Schweinitz (1822).
Agaricus (Mycena) iocephalus Berk. & Curt. Ann. and Mag. Nat.
Hist., II, 12: 420. 1853. See Marasmius iocephalus.
Agaricus (Mycena) nigripes. See Marasmius nigripes (Schw.) Fries.
Agaricus (Mycena) olivarius Peck. Omphalia olivaria Peck. Close
to 0. umbellifera but spores of type 5-6 X 4-5 A.
Agaricus (Mycena) rubiginosus. Reported by Schweinitz (1822).
Agaricus (Mycena) setisedus. Reported by Schweinitz (1834).
Agaricus (Mycena) tenacellus. Reported by Schweinitz (1822).
Agaricus (Mycena) tener. Reported by Schweinitz (1822).
Eomycenella echinicephala Atkinson, Bot. Gaz., 34: 37. 1902.
"Plants white, 3-8 mm. high. Pileus 0.5-0.75 mm. broad. Stipe
60-80, in diameter. Plants campanulate to expanded and upturned in age, trabeculae of upper surface echinulate, bearing here
and there globose free branches, 10-15 u in diameter and also echinulate, margin of pileus with free clavate branches in the form of a
fringe. Cells of the trabeculae 25-30 X 6-10 I. Hymenium plane
or with few short, narrow gills. Gills when present narrowed at each
end, not reaching the stipe. In the plant observed 8-10 long lamellae, 4-6 intermediate ones much shorter. Subhymenium loosely
branched, obovate cells arising from the trabeculae and terminating
in the basidia, or in the forms with lamellae arising from a rudimentary trama in the lamella. Basidia short clavate, abruptly narrowed
into a pedicel, 9-12 X 6-9,, 4-spored. Spores obovate-oblong,
elliptical, proximal end pointed, 6-8 X 3-4 A, hyaline, smooth,
granular. Stipe thread-like, with scattered hairs bearing a short
echinulate cell on the end. Base of stipe slightly broadened."
The diagnosis is quoted from the original account. Pennington,
in the North American Flora, Vol. 9, questionably referred this species
471