bract

(redirected from Bractless)
Also found in: Dictionary, Thesaurus, Encyclopedia.

bract

a specialized leaf with a single flower or inflorescence growing in the axil. See also SPADIX.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Mean insect visitation rate decreased by 23% in bractless shrubs as compared to controls, so the answer to the first question addressed (do Lavandula bracts enhance visitation?) must be yes.
At present I can only speculate on why styles from bractless shrubs have fewer tubes than controls in spite of equivalent stigmatic pollen loads.
Furthermore, pollinators probed the same number of heads on control and bractless half-shrubs, and this made changes in per-flower visitation rates unlikely (a precondition for increased pollen export; Stanton et al.