Glossary of Horticulture Terms
A, B, C, D, E-G, H-L, M-O, P, Q-R, S, T, U-Z
|
| Quadrangular |
Four angled, or pith or a twig. |
| Raceme |
A simple indeterminate inflorescence with
pedicel led flowers. An elongated , unbranched cluster
of stalked flowers. |
| Rachis |
The axis along which the leaflets of a pinnate
leaf are arranged (walnut). |
| Radial |
Arranged around and spreading from a common
center. |
| Radical |
Of or pertaining to the root. |
| Radicle |
The embryonic root of a seed. |
| Ranked |
Foliage is arranged in longitudinal planes
around the stem. |
| Ray flower |
A flower with a strap-shaped corolla, usually
found on the outer edge of a Compositae inflorescence. |
| Recurved |
Bent or curved backward, usually roundly
or obtusely so. |
| Reflexed |
Bent abruptly backward or downward. |
| Reticulate |
Like a net, the interstices closed. Usually
referring to the veins of a leaf. |
| Rhizome |
An underground stem distinguishable from
a root by the presence of nodes, buds or scale-like leaves. |
| Rhombic |
With four nearly equal sides, but unequal
angles, diamond shaped. |
| Rib |
A conspicuous vein of a leaf; or a prominent
ridge. |
| Rosette |
A crown of leaves radiating from a stem,
and at or close to the surface of the ground. |
| Rudiment |
The beginning of an undeveloped plant part. |
| Rufous |
Reddish brown. |
| Rugose |
Wrinkled, usually covered with wrinkles. |
| Runner |
A slender trailing shoot that usually roots
at the tip and some nodes. |
