Unisexual, having stamens or pistils only, [85].
Univalved, a pod of only one piece after dehiscence.
Unsymmetrical Flowers, [86].
Urceolate, urn-shaped.
Utricle, a small thin-walled, one-seeded fruit, as of Goosefoot, [121].
Utricular, like a small bladder.
Vaginate, sheathed, surrounded by a sheath (vagina).
Valve, one of the pieces (or doors) into which a dehiscent pod, or any similar body, splits, [122], [123].
Valvate, Valvular, opening by valves. Valvate, in æstivation, [97].
Variety, [176].