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vallecula pl. valleculae |
= colpus, fossula, furrow, groove, sulcus |
STRUCTURE |
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A longitudinal depression that is relatively shallow and narrow; esp. in fruits of Apiaceae (Umbelliferae). |
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vallecular |
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insertion |
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In or otherwise directly associated with the valleculae; esp. in fruits of Apiaceae (Umbelliferae). |
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vallecular |
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position |
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In or otherwise directly associated with the valleculae; esp. in fruits of Apiaceae (Umbelliferae). |
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valleculate |
= colpate, fossulate, furrowed, grooved, sulcate |
architecture |
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Having one or more relatively narrow and shallow longitudinal depressions; esp. fruits of Apiaceae (Umbelliferae). |
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…valleculate |
= …colpate, …fossulate, …furrowed, …grooved, …sulcate |
architecture |
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Having the number of valleculae indicated by the prefix; esp. fruits of Apiaceae (Umbelliferae); as in tetravalleculate, 8-valleculate. |
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valvate 1 |
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aestivation |
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Whorled and with members not overlapping, adjacent members laterally contiguous at their margins. |
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valvate 2 |
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arrangement |
planate structures |
Not overlapping, adjacent members laterally contiguous at their margins. |
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valvate 3 |
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dehiscence |
anther |
Poricidal with the pores formed by the raising of small flaps (valves) in the exterior wall. |
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valvate 4 |
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dehiscence |
fruit |
With longitudinal segments of the wall (valves) separating partly or wholly from one another, spreading outward from the base or apex, and sometimes falling away. |
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valve |
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STRUCTURE |
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Any longitudinal segment of a fruit wall delimited by lines of dehiscence. |
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vascular |
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insertion |
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Upon or otherwise directly associated with the vasculature. |
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vascular |
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position |
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Upon or otherwise directly associated with the vasculature. |
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vascular bundle |
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STRUCTURE |
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A discrete strand of conducting tissues (xylem, phloem) and associated cells (e.g., cambium) within a stem or other axial structure. |
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vasculature |
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STRUCTURE |
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The vascular strands of all orders (veins and veinlets) in a particular part or organ, regarded collectively; consisting of conducting tissues (xylem, phloem) and associated supporting and enclosing tissues (e.g., sclerenchyma, collenchyma). |
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vegetative |
< apomictic, asexual |
reproduction |
plant |
Producing new plants asexually by proliferation or fragmentation of sterile tissue, without formation of embryos (or seeds). The logical antecedent of this term is "reproduction," not the taxon in point or "plants," and syntax should be governed accordingly. Whenever this mode of reproduction is noted, the relevant propagative structures should be identified. |
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vein |
= nerve; > costa, midnerve, midrib, midvein, rib |
STRUCTURE |
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A strand belonging to any except the ultimate (least in diameter) order of vasculature in a leaf or other foliaceous structure. See also lateral vein, primary vein, secondary vein, tertiary vein, veinlet. |
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veined |
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architecture |
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Having one or more orders of evident vasculature. |
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veinlet |
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STRUCTURE |
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A strand belonging to the ultimate (least in diameter) order of vasculature in a leaf or other basically laminar structure when that order consists of strands ending freely within areoles and/or connecting distally by pairs across areoles; absent in some taxa. See also costa (rib), lateral vein, midvein (midnerve, midrib), primary vein, secondary vein, tertiary vein, vein (nerve). |
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velamen pl. velamina |
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STRUCTURE |
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A thin, often chartaceous (papery, papyraceous) or pergamentaceous (parchment-like), outermost tissue layer of an aerial root; esp. in Orchidaceae. |
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velum pl. vela |
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STRUCTURE |
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A membranous adaxial flap or fold of vegetative tissue wholly or partly covering the sporangial cavity of a sporophyll; in Isoëtaceae. |
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velutinous |
= velvety |
pubescence |
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Of or bearing dense, moderately firm, more or less erect, capillate trichomes, like velvet pile to the touch. |
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velvety |
= velutinous |
pubescence |
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Of or bearing dense, moderately firm, more or less erect, capillate trichomes, like velvet pile to the touch. |
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venation |
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CHARACTER |
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Configuration of laminar vasculature as to its hierarchical organization and the dispositions of component orders. For descriptive purposes, the orders of vasculature are ranked with reference only to the lamina in point, irrespective of rank within any larger vascular context. |
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ventral (not recommended) |
= adaxial |
insertion |
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On or pertaining to the side or portion of a lateral structure that faces (or would face) toward the bearing axis when (or if) the axis of the lateral structure is (or were) oriented in the same general direction as the bearing axis. |
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ventral (not recommended) |
= adaxial |
position |
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On or pertaining to the side or portion of a lateral structure that faces (or would face) toward the bearing axis when (or if) the axis of the lateral structure is (or were) oriented in the same general direction as the bearing axis. |
