Valvate

Webster's Dictionary of the English Language

·adj Opening as if by doors or valves, as most kinds of capsules and some anthers.

II. Valvate ·adj Resembling, or serving as, a valve; consisting of, or opening by, a valve or valves; valvular.

III. Valvate ·adj Meeting at the edges without overlapping;

— said of the sepals or the petals of flowers in aestivation, and of leaves in vernation.