Shēathed, p. a.

participial adjective

(shēthd), p. a. 1. Provided with, or inclosed in, a sheath. 2. (Bot.) Invested by a sheath or cylindrical, membranaceous tube, which is the base of the leaf, as the stalk or culm in grasses; vaginate.

A botanical drawing of a sheathed stalk with a long, narrow leaf.
Sheathed Stalk.