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midnerve |
= midrib, midvein; < costa, nerve, rib, vein |
STRUCTURE |
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A primary vein that runs longitudinally through the center of a leaf or other basically laminar structure. See also lateral vein, secondary vein, tertiary vein, veinlet. |
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viscidium pl. viscidia |
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STRUCTURE |
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A small, viscid, glandular body of rostellar origin that becomes connected with a pollinium caudicle, either directly or through an intervening stipe, by which the pollinium attaches to a pollinating insect; in Orchidaceae. |
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sperm |
> antherozoid, spermatozoid |
STRUCTURE |
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A male gamete. |
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cuboid |
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solid shape |
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Generally but not strictly cubic; more or less equilaterally six-sided, each side basically square. |
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placentation |
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CHARACTER |
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Disposition of the placenta(e) within an ovary. |
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involute 2 |
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vernation |
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Each rolled adaxially from the lateral margins. |
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bark |
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STRUCTURE |
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The outermost portion of any shoot or root axis having secondary growth, consisting of all those tissues outside the vascular cambium; sometimes exhibiting zonation into inner, living bark and outer, dead bark; usually described only as to external appearance. |
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ring-shaped |
= annular |
solid shape |
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More or less evenly tubular in a closed circle; like a ring or doughnut. |
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trulloid |
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solid shape |
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Elongate, basically square in transverse section, broadest below the middle, regularly attenuate to angular ends, all faces essentially plane. See also obtrulloid. |
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oblanceolate |
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plane shape |
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Inversely lanceolate (lancehead-shaped). |
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oblanceoloid |
= oblanciform |
solid shape |
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Inversely lanceoloid (lancehead-shaped, lanciform). |
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contortuplicate 1 |
= torsive |
aestivation |
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Plicate and contorted. |
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straight |
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course |
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Lacking significant curves or bends. |
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disc 1 var. disk |
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STRUCTURE |
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Any distinct, annular to discoid structure produced from or borne upon a floral receptacle between or basal to any of the sets of floral organs; usually fleshy, often nectariferous. |
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adaxial |
= ventral (not recommended) |
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. |
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medial |
= central, median |
insertion |
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At, upon, or closely ranged about the structural or symmetrical midpoint or axis. |
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flaccid |
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texture |
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Limp, sometimes appearing withered or shrunken. See also tumid (swollen, turgid). |
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second glume |
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STRUCTURE |
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The upper (distal) member of a pair of small bracts inserted at the base of a grass (Poaceae) spikelet. |
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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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panniform |
< felted |
pubescence |
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Of closely intertwined, capillate trichomes that form a dense, felt-like mat. See also pannose. |
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symmetric(al) 1 |
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plane shape |
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Divisible into essentially equal halves along one or more lines or planes. |
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ensate |
= sword-shaped |
plane shape |
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Elongate and moderately slender, broadest at the base and gradually attenuate to a short, more strongly attenuate, acute apex; like the outline of the lateral face of a broadsword blade. |
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netted 3 |
= reticulate |
relief |
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Having prominulous, more or less regularly interconnected lines. |
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slipper-shaped |
= calceolate |
solid shape |
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Relatively thin-walled with an essentially hollow interior that is open on one side at the broader end. |
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head-shaped |
= capitate, capitiform |
solid shape |
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Basically globose and resembling a head in the context of occurrence. |
