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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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raphides sing. raphis |
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STRUCTURE |
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Needle-like crystals of calcium oxalate contained within the cells of some plants; esp. in Araceae. |
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epigeous |
= epigeal |
location |
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Upon or very near the surface of the ground; esp. of cotyledons following seed germination. |
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…-scalloped |
= …crenate |
margin |
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Having the number of orders of scallops (crenae) indicated by the prefix, one upon another; as in twice-scalloped. See also …-sawtoothed (…serrate), …-toothed (…dentate). |
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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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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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stomium pl. stomia |
= stomatal pore |
FEATURE |
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The opening in the wall of a sporangium, between the lip cells, through which the spores exit; in Psilotophyta, Lycopodiophyta, Equisetophyta, Polypodiophyta. |
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stone |
= pyrene |
STRUCTURE |
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The hard inner portion of a drupe, consisting of osseous endocarp and included seed. |
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incurved |
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orientation |
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Curving adaxially. See also decurved. |
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terete |
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solid shape |
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Elongate and transversely round, gradually attenuate from base to apex; attenuate-cylindric or attenuate-tubular, broadest at the base. See also obterete. |
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leaf-opposed |
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position |
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Nodal and directly opposite the leaf. |
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unciform |
= hook-shaped |
solid shape |
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Very slenderly elongate with a more or less straight proximal portion and a recurved terminal portion, the whole resembling a hook. |
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trigonous |
= three-angled, triquetrous; > deltoid, obdeltoid |
solid shape |
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Elongate with three sides that meet at acute or obtuse angles. |
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abaxial |
= dorsal (not recommended) |
insertion |
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On or pertaining to the side or portion of a lateral structure that faces (or would face) away from 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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apical |
< distal |
insertion |
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At or very near the developmental end or tip (apex) of a structure. |
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lip cell |
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STRUCTURE |
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Either of a pair of adjacent, narrow, transversely oriented, thick-walled cells bordering the pore (stomium) of a sporangium. |
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bifacial |
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architecture |
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Having two opposite broad surfaces that differ distinctly in appearance. |
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mushroom-shaped |
= fungiform |
solid shape |
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Having a cylindric base and a considerably broader, pulvinate distal portion; like the generalized form of a mushroom. |
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catadromous |
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venation |
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Having the first lateral vein in each pinna or primary segment of the frond arise from its midvein on the side toward the base of the frond, the pinnule or secondary segment that it leads to often disproportionately larger than the next distal ones. |
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paleaceous |
= chaffy |
pubescence |
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Of or bearing small, thin, more or less erect, chartaceous (papery) to membranous, planate trichomes. |
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conic(al) |
= cone-shaped |
solid shape |
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Transversely round, essentially triangular in median longitudinal section, and broadest proximally. See also obconic(al). |
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pith |
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STRUCTURE |
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The central ground tissue of a stem or, when present, of a root, consisting of thin-walled parenchyma cells; distinct and more or less soft and spongy relative to the other tissues of the axis; sometimes partly or wholly degenerating after secondary growth has begun. |
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decurved |
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orientation |
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Curving abaxially. See also incurved. |
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elongate |
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solid shape |
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Longer in one dimension than in any other. |
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sack-shaped |
= bag-shaped, pouch-shaped, saccate |
solid shape |
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Irregularly obovoid with an exterior aspect intermediate between inflated and flaccid; like a closed pouch or bag. |
