The term pectinate sulcate is employed on account of a series of small elevations on the ridges, giving them a pectinate, or comb-like, appearance.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
In the original description the stem is said to be "striate sulcate."
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
Sporangium ovoid, more or less elongated; the calyculus small, plicate-sulcate.
"The Myxomycetes of the Miami Valley, Ohio"
A. P. Morgan