Webster's Revised Unabridged Dictionary · 1913

Three-leafed

Three-leafed , adjective

(a)
(Botany) Producing three leaves; as, three-leaved nightshade.
(b)
(Botany) Consisting of three distinct leaflets; having the leaflets arranged in threes.
Collocations (1)
Three-leaved nightshade , See Trillium.

Also: Three-leaved