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Plasmodiocarp long and widely effused, anon winding, here and there reticulate, always applanate; sometimes in form an �thalium, the peridial cortex membranous, firm, thick, and white.

Sporangia sessile, applanate, crowded, polygonal by mutual contact, fuscous or chestnut brown, shining, opening by a definite lid; spore-mass and capillitium yellow, the capillitium well developed, of slender yellow threads of various widths, almost smooth; spores minutely warted, 10–12 �.