Unisexual (unisexualis). Having only the organs of one sex completely developed; or containing the flowers of one sex only.
Urceolate (urceolatus). Urn-or pitcher-shaped, i.e., with an inflated tube contracted at the mouth.
Utricle (utriculus). A bladder-shaped indehiscent or irregularly bursting fruit.
Valvate (valvatus). With the margins meeting in the bud without overlapping.
Vascular Bundles (fasciae vasculares). Fibre-like bundles of vessels (confluent cells).
Vein (vena). A faint nerve.
Ventral (ventralis). Placed at or directed towards the inner side of the carpel.
Ventricose (ventricosus). Swelling on one side.
Vernation (vernatio). Praefoliation, i.e., the disposition of a leaf in the bud.
Versatile (versatilis). Attached by a point and turning freely on its support.