When the stem is wanting the pileus is sessile.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
These sporangia are nearly always perfectly regular in shape; they may be globose, obovoid, somewhat depressed, or more or less elongated, and are either stipitate or sessile.
"The Myxomycetes of the Miami Valley, Ohio"
A. P. Morgan
Sporangia sessile or plasmodiocarp; the wall a thin membrane, with a more or less thickened outer layer of minute brownish scales and granules.
"The Myxomycetes of the Miami Valley, Ohio"
A. P. Morgan