Glossary of Horticulture Terms
A, B, C, D, E-G, H-L, M-O, P, Q-R, S, T, U-Z
|
| Umbel |
Usually a flat-topped flower cluster, with
pedicels and peduncles arising from a common point, resembling
the supports of an umbrella. |
| Unarmed |
Without either spines or prickles, though
the leaves may have sharp teeth at the margins or tip
like holly. |
| Uncinate |
Hooked at the tip. |
| Undulate |
Wavy, as a leaf margin. |
| Unisexual flowers |
Flowers having either pistils or anthers,
but not both. |
| Valvate |
Applied to bud scales that meet along a
definite, usually longitudinal, line without overlapping;
the reverse of imbricate. |
| Variegated |
Striped, margined or mottled with a color
other than green, where green is normal. |
| Variety |
Subdivision of a species having a distinct
though often inconspicuous difference, and breeding true
to that difference. More general, also refers to clones. |
| Vascular bundle |
A discrete group of conducting vessels. |
| Vascular bundle scar |
A minute spot within the leaf scar where
the vessels were positioned. |
| Venation |
Arrangement of veins. |
| Venulose |
With very fine hairs. |
| Vernal |
Related to spring. |
| Vernation |
The arrangement of leaves within a bud. |
| Verrucose |
Having a wart-like surface. |
| Verticillate |
Arranged in whorls. |
| Vesicle |
A small bladdery sac or cavity filled with
air or fluid. |
| Vestige |
The remains of an exhausted or dead plant
structure. |
| Villous |
Having long, soft, shaggy hairs that are
not matted. |
| Vine |
A slender stemmed climbing or trailing plant. |
| Viscid |
Sticky or with appreciable viscosity. |
| Voluable |
Twining. |
| Weeping |
Dropping conspicuously, pendent. |
| Whorled |
An arrangement of three or more structures
arising from a single node. |
| Woolly |
Having long, soft, more or less matted or
tangled hairs; like wool. |
| X |
Indicates a hybrid. |
| Zone |
An area distinguished by a range of annual
average minimum temperatures, used in describing plant
hardiness. |
