- having an umbo or projecting boss.
- shaped like an umbo; having a rounded convex form: an umbonate fungus.
Origin of umbonate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for umbonate
This species differs from C. atrata in having an umbonate pileus.The Mushroom, Edible and Otherwise
M. E. Hard
Umbonate, bossed; furnished with a low, rounded projection like a boss (umbo).The Elements of Botany
The pileus is often umbonate or gibbous, and the center is often darker than the margin.
The pileus is first nearly cylindrical, then conic, becoming bell-shaped and finally nearly expanded, when it is umbonate.
When the center of the pileus is raised in the form of a boss or knob it is umbonate (Fig. 242).