Sibling crosses of monokaryotic isolates of eleven species of Marasmiu
s, representing four morphologically defined sections of the genus, su
pported the hypothesis that mating patterns are consistent between spe
cies at the sectional rank. Mating system data and brief discussions o
f cultural characteristics are provided for M. alliaceus, M. copelandi
i, and M salalis (section Alliacei); M olneii and M quercophilus (sect
ion Androsacei); M. capillaris, M. curreyi, and M wettsteinii (section
Marasmius); and M ciliatomarginatus, M falcatipes, and M. haematoceph
alus (section Sicci).