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polyplicate |
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architecture |
pollen grain |
Inaperturate with meridional folds, thus appearing longitudinally wrinkled. |
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salt-excreting |
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exudation |
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Accumulating salt and discharging it directly to the exterior in a concentrated aqueous solution, the salt then crystallizing on the exterior following evaporation of the fluid medium; when salt-excreting glands are indicated in the nominative, usually they are called simply salt glands. |
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pappus pl. pappi |
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STRUCTURE |
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A set of one or more awns (aristae, bristles, setae) or scales at the summit of an inferior ovary just beneath or outside the free portion of the corolla; persisting in the fruit (cypsela) and often aiding wind or animal dispersal; in Asteraceae (Compositae). Considered by some to be an evolutionarily modified upper calyx portion, the lower portion having been incorporated into the floral tube casing adnate to the ovary wall; considered by others to be an outgrowth from the ovary wall. |
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pubescence |
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CHARACTER |
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Collective aspect of trichomes borne on the surface. Many of the terms traditionally used for describing pubescence have been defined and used in so many differing and often contradictory ways that they have become hopelessly ambiguous. This is attributable mainly to overdefinition within this portion of the traditional lexicon — that is, to highly arbitrary and widely variant restriction of a term's scope to some one detailed combination of trichome character states (shape, size, orientation, etc.). By derivation these are essentially general terms, really suited only for denoting overall aspect. The diversity actually encountered in nature defies comprehensive and unambiguous resolution into any limited suite of precisely specified, mutually exclusive, complex character states that can be associated with these terms, which are best used only in their general senses. Sometimes, such description will be sufficient in itself; more often, additionally or alternatively, the various attributes of the individual trichomes should be described. This is the only strategy that allows for full description of any possible condition, including the presence of more than one type of trichome. The various terms used for describing pubescence have never been semantically consistent; in some cases they refer to the trichomes themselves, while in others they apply to the bearing surface or structure; e.g., sericeous (the trichomes themselves are collectively silky) versus barbate (the structure is bearded). See also coating, indumentum (vesture). |
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connivent |
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arrangement |
|
Converging and distally contiguous; esp. arcuate stamens with anthers contiguous. |
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ligule 4 |
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STRUCTURE |
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The distal, relatively flat portion of the zygomorphic corolla of a ligulate floret, terminating in 5 teeth or lobes; in Asteraceae (Compositae). |
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prop root |
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STRUCTURE |
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A relatively stout adventitious root arising from the lower portion of a main stem and extending outward and downward toward the substrate, within which it ultimately becomes anchored, thus buttressing the aboveground portion of the plant. |
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synandrous |
|
architecture |
flower, androecium |
Having the stamens connate. |
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naked 1 |
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architecture |
|
Lacking a covering that might have been expected. |
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superposed 2 |
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position |
buds |
Axillary in pairs, one member of each pair directly above the other. |
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glomerule |
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nominative |
inflorescence |
A compact cluster of capitula (heads), sometimes subtended by an involucre; thus, a compound capitulum (head); esp. in Asteraceae (Compositae). |
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erect |
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orientation |
|
Perpendicular to the horizon or to the general plane of a bearing structure. |
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intruded |
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placentation |
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Upon partial septa excrescent from the wall of a compound, unilocular ovary. |
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terminal |
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insertion |
|
Apical and with the same developmental axis as the whole, of which it is the distalmost portion or appendage. |
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non-porous |
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porosity |
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Lacking vessels, the tracheary elements limited to tracheids and, sometimes, fiber-tracheids. |
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fragrant |
|
odor |
|
Sweet or otherwise pleasant. |
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…colporate |
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architecture |
pollen grain |
Having the number of colpi indicated by the prefix, each containing a pore; as in dicolporate, 3-colporate. |
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xylary |
|
position |
|
Within or otherwise directly associated with the wood. |
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diplotegium pl. diplotegia |
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nominative |
fruit |
A pyxis with accessory tissue adnate to the pericarp; derived from an inferior ovary. |
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mamilla pl. mamillae |
|
STRUCTURE |
|
A nipple- or teat-shaped protrusion. |
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veinlet |
|
STRUCTURE |
|
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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soboliferous |
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architecture |
plant |
Having several, loosely clumped, principal stems that arise from a common underground stem system, each distinct above ground level. |
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velamen pl. velamina |
|
STRUCTURE |
|
A thin, often chartaceous (papery, papyraceous) or pergamentaceous (parchment-like), outermost tissue layer of an aerial root; esp. in Orchidaceae. |
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silique |
|
nominative |
fruit |
Dry, septifragal, two-loculed and derived from a single, superior, compound ovary; much longer than broad; dehiscing along two sutures, one adaxial, one abaxial, leaving a single persistent septum (replum) after the two valves of the pericarp have fallen away; esp. in Brassicaceae (Cruciferae), Capparaceae. See also silicle. |
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unisexual |
|
reproduction |
|
Having functional reproductive structures of only one sex. See also imperfect, pistillate, staminate. |
