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chaff 1 |
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STRUCTURE |
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Collectively, the paleae (pales, palets) sometimes borne on the receptacle of a capitulum (head) in Asteraceae (Compositae). |
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floral |
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position |
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Upon, within, or associated with the flowers. |
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pubescent 1 (broad sense) |
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pubescence |
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Bearing trichomes. This is one of the most ambiguous terms in the botanical lexicon; it should not be used unless its intended meaning is explicit. |
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canalicular |
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position |
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Upon or otherwise directly associated with the channel of a petiole or petiolule. |
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obdiplostemonous |
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architecture |
flower, androecium |
Having the stamens dicyclic, the proximal whorl with members directly above the petals, the distal whorl with members directly above the sepals. See also diplostemonous. |
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pappose |
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architecture |
flower, fruit |
Bearing a pappus; esp. in Asteraceae (Compositae). |
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extravaginal |
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position |
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Distal to or outside the leaf sheath. |
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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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valve |
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STRUCTURE |
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Any longitudinal segment of a fruit wall delimited by lines of dehiscence. |
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vascular |
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insertion |
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Upon or otherwise directly associated with the vasculature. |
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epidermal cell |
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STRUCTURE |
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Any of the unspecialized cells of an epidermis; i.e., any other than stomatal guard cells or cells directly associated with trichomes. While the latter specialized cells are also properly epidermal cells, they are treated separately for descriptive purposes and, for the sake of convenience, use of the general term is restricted to the unspecialized cells that constitute the bulk of an epidermis. |
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fibrous |
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texture |
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Having tough, woody or sclerotic strands distributed through a softer matrix. |
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gynoecium pl. gynoecia var. gynaecium |
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STRUCTURE |
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The pistil(s) of a single flower together with any ontogenetically equivalent or subordinate structures present, taken collectively; the total female (ovule-producing) structural complement of a single flower. It may include one to many pistils, each simple or compound. |
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stephanoporate |
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architecture |
pollen grain |
Having more than three pores disposed equatorially. |
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xylary |
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position |
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Within or otherwise directly associated with the wood. |
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infructescence 1 |
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STRUCTURE |
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A mature (fruiting) inflorescence (static sense). |
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subpetiolar |
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position |
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Just below the point of petiole insertion. |
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heterocolpate |
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architecture |
pollen grain |
Having long, narrow, regularly disposed lacunae (pseudocolpi). |
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axil |
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FEATURE |
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The space bounded by and near the vertex of the distal angle between a lateral structure, especially a leaf, and the axis that bears it. |
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decussate |
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arrangement |
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Opposite with successive pairs radially oriented at right angles to one another, thus polystichous with four equidistant ranks. |
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monadal |
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arrangement |
pollen |
Shed singly, or essentially so, only loosely and irregularly, if at all, coherent, each original tetrad having separated fully. |
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superior 1 |
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insertion |
indusium |
Inserted at or near the apex of the sorus, distal to the sporangia. |
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pollinarium pl. pollinaria |
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STRUCTURE |
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A pollinium together with, when present, its stipe and viscidium; the entire unit of pollinium dispersal. |
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oblate |
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plane shape |
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Symmetrically elongate and broader than long perpendicular to the developmental or polar axis. |
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liguliflorous |
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architecture |
capitulum (head) |
Bearing florets that all are bisexual and have zygomorphic corollas; in Asteraceae (Compositae). |
