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macula pl. maculae |
= blotch, spot |
FEATURE |
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An area that differs in color from the rest of a structure's surface, usually due to differing coloration. See also eyespot. |
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channel |
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FEATURE |
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A longitudinal, transversely rounded depression; esp. along the adaxial surface of a petiole or petiolule. |
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papilla pl. papillae |
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FEATURE |
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A small, conoidal protrusion resembling a pimple. See also pustule (blister, bulla). |
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colpus pl. colpi |
= fossula, furrow, groove, sulcus, vallecula |
FEATURE |
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An elongate depression that is relatively shallow and narrow. |
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blister |
= bulla, pustule |
FEATURE |
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A relatively coarse, rounded protrusion or convexity. See also papilla. |
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hilum 1 pl. hila |
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FEATURE |
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The scar left on a seed at the point of its abscission from the funiculus. |
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scallop |
= crena |
FEATURE |
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A rounded, marginal convexity or concavity in a series of such that alternate regularly and are oriented more or less perpendicular to the generalized perimeter of a laminar structure. See also sawtooth, sawtoothlet, scalloplet (crenule), tooth (dens), toothlet. |
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hilum 2 pl. hila |
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FEATURE |
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The more or less central point within a starch grain of intracellular origin, about which the successive layers of starch were accreted more or less symmetrically. |
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blotch |
= macula, spot |
FEATURE |
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An area that differs in color from the rest of a structure's surface. See also eyespot. |
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equatorial ridge |
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FEATURE |
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A circumferential ring about a megaspore in the plane of its equator, raised above the remainder of the wall surface; in some heterosporous taxa of Polypodiophyta. |
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crenule |
= scalloplet |
FEATURE |
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A diminutive crena (scallop). See also dens (tooth), sawtooth, sawtoothlet, toothlet. |
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face |
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FEATURE |
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A relatively large, flat or shallowly curved portion of the external surface of a three-dimensional structure, bounded by more or less distinct topological discontinuities. |
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spot |
= blotch, macula |
FEATURE |
|
An area that differs in color from the rest of a structure's surface, usually due to differing coloration. See also eyespot. |
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pore |
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FEATURE |
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A small aperture or opening in a wall or covering that allows transport between interior and exterior. |
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dot |
= punctum |
FEATURE |
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A small, generally round sector of distinct coloration or relief. |
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scalloplet |
= crenule |
FEATURE |
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A diminutive scallop (crena). See also sawtooth, sawtoothlet, tooth (dens), toothlet. |
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lacuna pl. lacunae |
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FEATURE |
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A hole or cavity; an empty space surrounded by tissue in two or three dimensions. |
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leaf scar |
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FEATURE |
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A scar on a twig or stem due to abscission of a megaphyll; having an outline like that of a transverse section through the base of the petiole, sheath, or blade that was inserted there. |
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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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cell 2 (not recommended) |
= chamber (not recommended), locule |
FEATURE |
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Any structurally distinct compartment within an anther, ovary, fruit, sporangium or other organ; not necessarily having any evolutionary integrity. |
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stipule scar |
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FEATURE |
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A scar on a stem or petiole due to abscission of a stipule; having an outline like that of a transverse section through the base of the stipule inserted there; variously disposed, usually in pairs, adjacent to a point of leaf insertion, sometimes confluent with the leaf scar, sometimes confluent with stipule scars associated with an opposite leaf, the two sets of scars then more or less encircling the axis. |
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clinandrium pl. clinandria |
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FEATURE |
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The cavity in a floral column (gynostemium) within which the anthers are borne. |
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laesura pl. laesurae |
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FEATURE |
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An elongate aperture in the proximal face of a spore at or near its pole, coterminous with a tetrad scar; in Psilotophyta, Lycopodiophyta, Equisetophyta, Polypodiophyta. Depending upon tetrad configuration and resultant scar pattern, a laesura may be either unbranched or branched, the branches when present (usually 3) radiating from the pole and of approximately equal lengths. |
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callus |
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FEATURE |
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A small, relatively hard covering, outgrowth, or swelling of tissue; esp. in axes of grass (Poaceae) inflorescences just distal to points of eventual disarticulation. |
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commissure |
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FEATURE |
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Precisely, the joint or common boundary between the facing surfaces of two coherent or mutually appressed structures such as mericarps or stigmas, but traditionally (though imprecisely) applied to such a facing surface itself. |
