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trichome |
> bristle, capillus, glochid, glochidium, hair, lepis, scale, seta, squama, squamella, squamule; >< cilium |
STRUCTURE |
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Any superficial, unicellular or multicellular structure arising entirely from an epidermis. Unlike other epidermal enations or coverings, trichomes are cellular structures. |
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apiculum 2 pl. apicula |
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STRUCTURE |
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The apex of a connective, when prolonged above the union of the anthers. |
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pistil |
> carpel |
STRUCTURE |
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Any simple or compound, discrete or histologically distinct, female (ovule-producing) floral structure, or any putatively homologous sterile structure; comprising an ovary and one or more stigmas borne either directly upon the ovary or upon one or more intervening styles. See also gynoecium. |
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tiller |
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STRUCTURE |
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An erect or ascending stem that branches from the base of another at or below the surface of the ground; esp. in Poaceae (Gramineae) and other monocotyledons (Liliidae). |
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standard |
= banner, vexillum |
STRUCTURE |
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The relatively large, erect adaxial (upper) petal in a papilionaceous corolla. |
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unguis pl. ungues |
= claw |
STRUCTURE |
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The abruptly much narrower proximal portion, when present, of a laminar structure, esp. a petal; of variable shape itself, but usually attenuate toward the base. |
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gynoecium pl. gynoecia var. gynaecium |
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STRUCTURE |
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The pistil(s) of a single flower together with any ontogenetically equivalent or subordinate structures present, taken collectively; the total female (ovule-producing) structural complement of a single flower. It may include one to many pistils, each simple or compound. |
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carpel |
< macrosporophyll (not recommended), megasporophyll, pistil |
STRUCTURE |
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A more or less abstract unit of floral structure conceptually equivalent to a simple pistil or its putative evolutionary precursor (megasporophyll) or derivative (constituent of compound pistil); often regarded as the basic evolutionary unit of the gynoecium. |
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ray 1 |
< primary axis |
STRUCTURE |
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A first-order axis within a compound umbel. |
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arista pl. aristae |
= awn, bristle, seta |
STRUCTURE |
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A slender, more or less straight and stiff, fine-pointed, terminal or subterminal appendage or prolongation, sometimes a continuation of the bearing structure's central primary vein, as on a glume, lemma, or palea in Poaceae (Gramineae). |
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filament |
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STRUCTURE |
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The stalk, when present, of a stamen, clearly differentiated from and bearing at its summit an anther. |
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sawtoothlet |
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STRUCTURE |
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A diminutive sawtooth. See also scallop (crena), scalloplet (crenule), tooth (dens), toothlet. |
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stomatal apparatus |
= stomate, stoma (broad sense) |
STRUCTURE |
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A localized functional epidermal unit consisting of a microscopic pore and two encircling specialized cells, the guard cells, which, through changes of turgor pressure in response to environmental conditions, regulate the size of the pore and thus the rates of transpiration and gas exchange through it; the whole surrounded or not by associated, cytologically distinctive epidermal cells, the subsidiary or accessory cells, which, when present, are regularly oriented in relation to it. |
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dissepiment |
< septum; > replum |
STRUCTURE |
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A wall or partition between adjacent locules of an ovary or fruit. |
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taproot |
< primary root |
STRUCTURE |
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A primary root that remains dominant through the life of the plant as the main axis of a vertically oriented system that penetrates the substrate to a considerable depth. |
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bracteole 1 |
= bractlet; < bract |
STRUCTURE |
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A diminutive bract, or a bract that is smaller than others present. |
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funiculus pl. funiculi |
= funicle; < stalk |
STRUCTURE |
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A stalk that attaches an ovule to a placenta of the ovary wall. |
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mesocarp |
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STRUCTURE |
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The middle tissue layer of the pericarp of a fruit. |
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claw |
= unguis |
STRUCTURE |
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The abruptly much narrower proximal portion, when present, of a laminar structure, esp. a petal; of variable shape itself, but usually attenuate toward the base. |
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peduncle |
<stalk, stipe (broad sense, not recommended) |
STRUCTURE |
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The common stalk, when present, of a compound inflorescence or first-order subunit thereof, or of a solitary flower that is deemed to represent an evolutionarily reduced compound inflorescence. |
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husk |
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STRUCTURE |
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A more or less dry, hard or fibrous, simple or compound enclosure or outer layer of a seed, fruit or inflorescence. |
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sucker |
> turion |
STRUCTURE |
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A shoot arising adventitiously from a root or stem below or at ground level. |
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vexillum pl. vexilla |
= banner, standard |
STRUCTURE |
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The relatively large, erect adaxial (upper) petal in a papilionaceous corolla. |
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ray 2 |
= lamina |
STRUCTURE |
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The distal, relatively flat portion of the corolla of a ray floret, terminating in 0--4 teeth or lobes; in Asteraceae (Compositae). |
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elaiosome |
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STRUCTURE |
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A fleshy outgrowth from the seed coat (testa) that contains a high proportion of oil, usually attracting ants for dispersal. |
