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bud-scale scar |
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FEATURE |
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A scar on a stem due to abscission of a bud scale. The scar(s) encircle(s) the axis to which the bud was terminal, each single scar having an outline like that of a transverse section through the base of the bud scale that was inserted there. Sets of bud scale scars (one set per bud) usually delimit seasonal stem growth increments in temperate zone taxa. |
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groove |
= colpus, fossula, furrow, sulcus, vallecula |
FEATURE |
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A longitudinal depression that is relatively shallow and narrow. |
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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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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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ridge |
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FEATURE |
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A very narrow, elongate, relatively low protrusion; esp. on fruits in Apiaceae (Umbelliferae). |
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spot |
= blotch, macula |
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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suture |
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FEATURE |
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An evident line of ontogenetic union. |
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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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pustule |
= blister, bulla |
FEATURE |
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A relatively coarse, rounded protrusion or convexity. See also papilla. |
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furrow |
= colpus, fossula, groove, sulcus, vallecula |
FEATURE |
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An elongate depression that is relatively shallow and narrow. |
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lumen pl. lumina |
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FEATURE |
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A space enclosed by the wall(s) or membrane(s) of a structure. |
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stoma 2 (strict sense) pl. stomata |
= stomatal pore |
FEATURE |
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The aperture between and regulated by the two guard cells of a stomate (stomatal apparatus). |
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tubercle |
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FEATURE |
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A small, rounded, knot-like swelling or wart-like protrusion. |
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fossula pl. fossulae |
= colpus, furrow, groove, sulcus, vallecula |
FEATURE |
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An elongate depression that is relatively shallow and narrow. |
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rank |
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FEATURE |
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A sequence of lateral structures arising from the same axis at successive points along its length and diverging from it in the same direction. |
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stomatal pore 1 |
= stoma (strict sense) |
FEATURE |
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The opening between and regulated by the two guard cells of a stomate (stomatal apparatus). |
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umbo pl. umbines, umbos |
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FEATURE |
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A relatively small, rounded or conical, central protrusion upon an essentially round, broad face. |
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pit |
= fovea, scrobis |
FEATURE |
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A small, rounded depression. |
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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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collar 2 |
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FEATURE |
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The junction between the sheath and blade of a leaf; esp. in Poaceae (Gramineae). |
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bulla pl. bullae |
= blister, pustule |
FEATURE |
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A relatively coarse, rounded protrusion or convexity. See also papilla. |
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stomatal pore 2 |
= stomium |
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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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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sulcus pl. sulci |
= colpus, fossula, furrow, groove, vallecula |
FEATURE |
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An elongate depression that is relatively shallow and narrow. |
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crena pl. crenae |
= scallop |
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 crenule (scalloplet), dens (tooth), sawtooth, sawtoothlet, toothlet. |
