Glossary: V
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vallecular canal
- The tubular vessels sometimes surrounding the central cavity in some horsetails (Equisetum species).
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valvate
- An arrangement of the flower in which the petals or sepals meet at their edges without overlapping.
- vascular
- With well-defined vessels (that conduct water and other materials around a plant).
- vegetative
- Associated with roots, stems, or leaves, not the flowers or fruits; produced without sexual fertilization.
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vein
- A vessel that conducts nutrients, sugars, and other substances throughout plant tissues; usually associated with leaves.
-
veinlet
- A small vein.
-
velum
- A thin layer of tissue that partially or wholly covers the sporangia in the base of a quillwort (Isoetes) leaf.
-
venation
- The pattern of veins as seen on the surface of a leaf.
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ventral
- Pertaining to or located on the front or inner part of a structure.
-
vernation
- The orientation of leaves or petals in bud.
-
verrucose
- Warty.
- vestigial
- Poorly developed due to reduction during evolution.
-
villous
- With long, soft, bent hairs.
- vine
- An herbaceous climbing or trailing plant that does not support its own weight.
- viscid
- Sticky.
-
viscidium
- The gland to which the pollinia are attached in orchids.
