The Myxomycetes of the Miami Valley, Ohio

by A. P. Morgan

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Reprint from The Journal of the Cincinnati Society of Natural History, August, 1896.

THE MYXOMYCETES OF THE MIAMI VALLEY, OHIO.

By A. P. Morgan.

Fourth Paper.

(Read May 6, 1896.)

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Order VIII. PHYSARACEÆ.

Sporangia simple and stipitate or sessile, sometimes plasmodiocarp, rarely combined into an aethalium; the wall a thin membrane, usually with an outer layer of minute roundish granules of lime. Stipe present or often wanting, seldom prolonged within the sporangium as a columella. Capillitium consisting of slender tubules, which branch repeatedly in every direction and anastomose to form an intricate network, the extremities attached on all sides to the wall of the sporangium; the tubules more or less expanded at the angles of the network and inclosing minute roundish granules of lime, these granules either aggregated into nodules with intervening empty spaces or more rarely distributed throughout their entire length. Spores globose, very rarely ellipsoidal, violaceous.

This order is at once distinguished from the Didymiaceæ by the presence of the granules of lime in the capillitium.