North American species of Mycena.

6 NORTH AMERICAN SPECIES OF MYCENA

pophores and line drawings of the microscopic characters made it our
most completely illustrated contribution on Mycena up to that time.
Many lists, of course, have been published for various parts of
North America. That of Harkness and Moore (1881) was the first
to record a substantial number from the Pacific Coast. Most lists
contain M. galericulata, M. corticola, M. Leaiana, and M. haematopus.
It has been impossible to verify the published reports of all species
by an examination of the specimens. Without any question many
are erroneous. Most reports of M. galericulata probably are based
on M. inclinata. M. corticola, M. haematopus, and M. Leaiana are
the three species most likely to be identified correctly. However,
the report of M. corticola by Harkness and Moore needs further confirmation. I have searched in vain for this species along the Pacific
coast, but found only M. madronicola, a fungus very similar in appearance. It is likely that most early American records of M. amicta
or M. Iris for the eastern United States are based on M. subcaerulea.
SUMMARY
In the following account 218 species are recognized from the
United States and Canada and 19 from the American tropics. Those
from the United States and Canada are distributed in the subgenera
as follows: Pseudomycena, 6; Eumycena, 185; Glutinipes, 21; Mycenella, 6. In Eumycena the distribution in sections is: Cyanescentes, 2; Corticolae, 5; Deminutivae, 37; Lactipedes, 11; Adonidae,
27; Calodontes, 18; Typicae, 66; Omphaliariae, 14; Floccipedes, 3;
Corticatae, 3; Hydropus, 5. Naturally the Typicae of Eumycena
form a center about which to group the other sections and subgenera.
Kiihner in his monograph recognized 143 species in Mycena for
Europe. This figure should be compared with the 218 known to
occur in the United States and Canada. Even after one allows for
the usual differences of opinion among investigators as to what constitutes a species, it is still evident that North America contains a
much more diverse Mycena flora than Europe. This is in line with
observations on other genera such as Leucopaxillus (see Singer and
Smith, 1943), and also with mine on Cortinarius. Studies of the
Mycena flora of other parts of the world have not been extensive
enough to justify comparison. Cleland (1934) recognized 17 species
from South Australia, but that flora must still be regarded as relatively unexplored as compared with those of Europe and North
America. The small number recorded from South America, Asia,