Umbel. A simple inflorescence of flowers on pedicels which radiate from the same point. Page [xiv.]
Umbellate. Arranged in umbels.
Undulate. With a wavy margin or surface. Page [xiii.]
Unisexual. Of one sex, either staminate or pistillate; not perfect.
Veins. Threads of fibro-vascular tissue in a leaf, petal, or other flat organ.
Villose or Villous. Covered with long, soft hairs.
Viscid. Glutinous; sticky.
Whorl. An arrangement of leaves or branches in a circle round an axis.
Wood. The hard part of a stem lying between the pith and the bark.
Woolly. Covered with long and matted or tangled hairs.