A whorl of organs such as leaves or flowers arranged around a single point on the stem.

A condensed, false whorl of flowers formed from a pair of opposite cymes.

Characteristic floral arrangement in Lamiaceae family plants.

Having structures arranged in whorls.

Forming a ring or whorl, often referring to leaves or branches.

Relating to or having vesicles; blister-like or sac-like.

A small bladder or sac, often containing air or fluid.

Opening or active in the evening.

A tube-like structure in vascular plants formed from vessel elements for water transport.

A reduced or rudimentary structure that is a remnant of a fully developed one.