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microphyll |
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STRUCTURE |
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A small, lateral, leaf-like enation that, evolutionarily, is not a true leaf, i.e., whose vasculature, if any, consists of only a single median strand not ontogenetically integral with the vasculature of the bearing stem and not associated with leaf gaps in the stele of the stem; in Bryophyta, Psilotophyta, Lycopodiophyta, Equisetophyta. |
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cyathiform |
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solid shape |
perianth, calyx, corolla, pappus |
Having a cupulate tube and an indistinct, erect limb. See also cotyliform, urceolate (urn-shaped). |
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matted |
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habit |
plants |
Growing in extensive, low, dense aggregations, sometimes with the stems of different plants intertwined. |
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canalicular |
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insertion |
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Upon or otherwise directly associated with the channel of a petiole or petiolule. |
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nectariferous |
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exudation |
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Producing and secreting nectar; when glands are nectariferous, they are usually indicated nominatively as nectaries. |
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didynamous |
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architecture |
flower, androecium |
Diadelphous with two stamens in each set. See also tetradynamous. |
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symmetric(al) 1 |
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architecture |
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Divisible into essentially equal halves along one or more lines or planes. |
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apex pl. apices |
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CHARACTER |
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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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obtrulloid |
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solid shape |
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Inversely trulloid. |
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nutrition |
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CHARACTER |
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Mode of acquiring nutrients. |
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coating |
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CHARACTER |
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Exudate that covers the surface proper. See also indumentum (vesture), pubescence. |
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tendril |
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STRUCTURE |
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A slender stem branch, modified leaf, or portion of a leaf that twines about a supporting structure. |
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circumscissile |
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dehiscence |
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Splitting transversely through the exterior wall about its entire circumference, the resulting upper cap-like portion falling away. |
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epichilium |
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STRUCTURE |
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The distal portion of a labellum (lip) that has distinct proximal, distal, and sometimes also central parts; in Orchidaceae. See also hypochilium, mesochilium. |
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opposite 2 |
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arrangement |
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Having the members of each whorl inserted directly above and/or below those of the next adjacent whorl(s). See also antipetalous, antisepalous. |
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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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elongate |
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plane shape |
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Longer in one dimension than in any other. |
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parietal |
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placentation |
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Upon the inner wall surface of a unilocular ovary, thus peripheral within the locule. |
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gelatinous |
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texture |
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Jelly-like; soft, moist, continuously cohesive, texturally homogeneous, somewhat resilient, and easily cut. |
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position |
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CHARACTER |
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Location or disposition with reference to some dissimilar structure(s) or larger context. The lexicons relating to position and insertion overlap to a great degree, since these two morphological concepts are often inseparable in practice. Also overlaps conceptually with arrangement, habit, orientation, and shape. |
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aseptate |
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architecture |
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Lacking internal walls or partitions (septae). |
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radiant 1 |
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architecture |
capitulum (head) |
Bearing one or more peripheral series of florets that are bisexual, pistillate, or neuter and that have relatively large actinomorphic corollas, and one or more central series of usually bisexual florets that have relatively small actinomorphic corollas; in Asteraceae (Compositae). |
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revolute 2 |
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vernation |
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Each rolled abaxially inward from the lateral margins. |
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heteropolar |
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architecture |
pollen grain, spore |
Having morphologically evident polarity, the proximal and distal halves dissimilar. |
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reclining |
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habit |
axis |
Inserted above substrate level and recurved, the distal portion procumbent. |
