Undulate, wavy.
Unisexual, of one sex; said of flowers having stamens only, or pistils only.
Urceolate, cylindrical or ovoid, but contracted at or below the open orifice, like an urn or a pitcher.
Valve, the several parts of a dehiscent pericarp; the doorlike lid by which some anthers open.
Ventricose, swelling unequally, or inflated on one side.
Versatile, swinging; turning freely on its support.
Villous, bearing long and soft, straight or straightish hairs.
Virgate, wandlike.
Viscid, glutinous; sticky.
Whorl, an arrangement of leaves, flowers, etc., in a circle about the stem, or axis.