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branchlet |
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STRUCTURE |
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A branch of the highest or ultimate order. |
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infrabracteal |
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insertion |
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Upon the axis directly below a bract insertion. |
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dyadal |
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arrangement |
pollen |
Cohering and shed in pairs, each tetrad having separated into halves. |
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funicular |
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derivation |
aril |
Produced from or a modification of the funiculus (funicle). |
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caducous |
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duration |
structure |
Deciduous upon or immediately after emergence, with little or no evident senescence beforehand. |
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sinuate |
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margin |
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Having regular, curved, smoothly connected, alternating concavities and convexities. See also repand. |
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venation |
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CHARACTER |
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Configuration of laminar vasculature as to its hierarchical organization and the dispositions of component orders. For descriptive purposes, the orders of vasculature are ranked with reference only to the lamina in point, irrespective of rank within any larger vascular context. |
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endocarp |
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STRUCTURE |
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The innermost tissue layer of a pericarp. |
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anisopetalous |
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architecture |
flower, perianth, corolla |
Having petals unequal in size and/or shape. |
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monochlamydeous |
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architecture |
flower |
Having a monocyclic perianth. |
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reduced |
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size |
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Unusually or unexpectedly small. |
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supramedial |
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insertion |
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Just above the middle of the structure in point. |
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waisted |
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solid shape |
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Constricted in width or breadth at or near the middle of its length. |
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episepalous |
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insertion |
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Upon the sepals, or partially adnate thereto and apparently arising therefrom. |
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apocarpous |
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architecture |
flower, gynoecium |
Having two or more simple pistils (carpels). |
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rhizophore |
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STRUCTURE |
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A stem branch that bears no leaves and from which roots eventually arise; esp. in Selaginellaceae. |
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caudex pl. caudices |
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STRUCTURE |
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The short, persistent, thickened, more or less erect, main stem of a perennial plant that otherwise has annual stems. |
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woody-clumping |
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habit |
plant |
Having or developing the character of a woody clump. See also arboreous, arborescent, bushy, frutescent, fruticose, shrubby, subshrubby, suffrutescent, suffruticose, tree-like. |
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extent |
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CHARACTER |
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Reach of the septum or septa within the ovary or fruit, relative to the ovary wall or pericarp and its center. |
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tetradynamous |
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architecture |
flower, androecium |
Diadelphous with four stamens in one set and two in the other. See also didynamous. |
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cyathium pl. cyathia |
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nominative |
inflorescence |
Resembling a single flower, the unbranched axis very short with a terminal pistillate flower and several lateral staminate flowers, the whole subtended and to some degree enclosed by a cupulate envelope of bracts, the flowers diminutive and presumed to be evolutionarily reduced; characteristic of Euphorbia. |
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polygamous |
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reproduction |
taxon |
Having both bisexual and unisexual flowers, borne on the same or on different plants. |
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fenestrate |
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architecture |
pollen grain |
Having more or less isodiametric, regularly disposed lacunae. |
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obtrulloid |
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solid shape |
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Inversely trulloid. |
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base |
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CHARACTER |
|
Configuration of the lowermost or proximal portion of a structure, its extent determined somewhat subjectively in relation to the shape of the structure as a whole. The concept of base varies from one descriptive context to another, since the base is not a clearly delimited, morphologically distinct entity. The terms for describing basal condition are not strictly coordinate logically — some are more inclusive than others, and some describe conditions involving what can be regarded as appendages — and precise characterization may require using more than one descriptor. The semantic antecedent of some descriptors is "base," whereas the antecedent of others is the structure as a whole (e.g., leaf ). |
