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strict |
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course |
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Lacking any curve or bend. |
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parallelodromous |
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venation |
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Having two or more primary veins that run more or less parallel to one another over most of the laminar length and converge near the apex. |
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indusium pl. indusia |
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STRUCTURE |
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A protective membrane that is an outgrowth from the epidermis and covers a sorus during its maturation; in Polypodiophyta. |
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dull |
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reflectance |
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Reflecting only a low proportion of incident light, with no apparent sheen. |
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racemose |
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architecture |
inflorescence |
Comprising one or more racemes. |
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connate-perfoliate |
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architecture |
opposite laminar structures |
Having the bases in each pair fused and together encircling the bearing axis. See also amplexicaulous, perfoliate. |
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pepo |
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nominative |
fruit |
Like a berry but derived from a single, inferior, compound ovary, with accessory floral-tube tissue adnate to the pericarp, having a relatively thin, hard or leathery rind and a thicker, fleshy inner wall that surrounds a mass of seeds; esp. in Cucurbitaceae. |
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vasculature |
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STRUCTURE |
|
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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bundle scar |
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FEATURE |
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A smaller scar within the bounds of a leaf scar at the point where a vascular bundle traversed the abscission layer between stem and leaf. |
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intravaginal |
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insertion |
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Within the leaf sheath. |
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embryo |
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STRUCTURE |
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The rudimentary spermatophyte contained within a viable seed. |
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mixed-craspedodromous |
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venation |
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Having a midvein that branches to either side along the length of the lamina, the secondary veins running thence toward the margin, some becoming indistinct before reaching it, others terminating there. |
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supervolute |
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vernation |
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Each with one side rolled adaxially inward from the margin and enveloped by the abaxially rolled opposite side. |
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geminicolpate |
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architecture |
pollen grain |
Having four or more surficial grooves (colpi) disposed in pairs. |
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coronal |
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insertion |
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Upon or otherwise directly associated with the corona. |
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petiolar |
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position |
|
Upon or otherwise directly associated with the petioles. |
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spadicate |
|
architecture |
inflorescence |
Generally spicate but with the flowers embedded in a thick, fleshy axis, the whole subtended and usually partially or wholly enveloped by a large bract (spathe). |
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knee 1 |
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STRUCTURE |
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An abrupt bend in an axial or other elongate structure. |
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epipetalous |
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position |
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Upon the petals, or partially adnate thereto and apparently arising therefrom. |
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revolute 1 |
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margin |
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Rolled inward abaxially. |
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syncolporate |
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architecture |
pollen grain |
Syncolpate, each groove containing a pore. |
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apex pl. apices |
|
CHARACTER |
|
Configuration of the uppermost, distal, or terminal portion of a structure, its extent determined somewhat subjectively in relation to the shape of the structure as a whole. The concept of apex varies from one descriptive context to another, since the apex is not a clearly delimited, morphologically distinct entity. The terms for describing apical condition are not strictly coordinate logically — some are more inclusive than others, some describe conditions involving what can be regarded as appendages, and some refer to the apex in a developmental as well as a strictly topological sense — and precise characterization may require using more than one descriptor. The semantic antecedent of some descriptors is "apex," whereas the antecedent of others is the structure as a whole (e.g., leaf ). |
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revolute 2 |
|
vernation |
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Each rolled abaxially inward from the lateral margins. |
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casing |
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STRUCTURE |
|
The portion (if any) of a floral tube that is adnate to the gynoecium. See also collar, neck. |
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rosette |
|
STRUCTURE |
|
A set of leaves that are strongly congested and disposed in radial symmetry about the main stem at or very near its base, seeming to arise at the same level and often overlapping laterally; esp. the overwintering leaves of perennial herbs. |
