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squama pl. squamae |
= lepis; < scale, trichome |
STRUCTURE |
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A relatively thick, planate trichome. See also squamella (squamule). |
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…sulcate |
= …colpate, …fossulate, …furrowed, …grooved, …valleculate |
architecture |
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Having the number of sulci indicated by the prefix; esp. pollen grains; as in monosulcate, polysulcate, 3-sulcate. |
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transverse 2 |
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orientation |
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Perpendicular to the long axis of the context of reference. |
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verticillate |
= cyclic, seriate, whorled |
arrangement |
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Disposed along the axis in groups of three or more, the members of each group (cycle, series, verticil, whorl) inserted regularly around the axis at the same level. |
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attenuate 1 |
= concave-tapered |
base |
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Gradually diminishing in width or diameter toward the proximal end, the sides longitudinally concave. Corresponds with acuminate for apex shape. |
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median |
= central, medial |
insertion |
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At, upon, or closely ranged about the structural or symmetrical midpoint or axis. |
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bulliform |
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solid shape |
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Resembling a blister; broad, relatively thin at the periphery, the lower surface approximately flat, the upper shallowly to strongly convex. |
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oblong 1 |
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plane shape |
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Compressed-elliptic, the sides approximately parallel from near one end to near the other. See also elliptic(al) (oval). |
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penicillate |
= broom-shaped, muscariform |
solid shape |
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Having a proximal axis that bears a distal cluster of elongate slender branches or appendages, these variously ascending to erect; like a broom. |
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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. |
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primary axis |
> ray |
STRUCTURE |
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A main or first-order axis within any specified, uniformly delimited structural context. |
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fovea pl. foveae |
= pit, scrobis |
FEATURE |
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A small, rounded depression. |
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spinescent |
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architecture |
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Becoming spinose. |
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insertion |
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CHARACTER |
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Mode or locus of attachment of a structure to some dissimilar bearing structure. The lexicons relating to insertion and position overlap to a great degree, since these two morphological concepts are often inseparable in practice. Also overlaps conceptually with arrangement, habit, orientation, and shape. |
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throat 1 |
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STRUCTURE |
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The far distal portion of a perianth, calyx, or corolla tube, or of a leaf sheath, surrounding the orifice of the tube or sheath, sometimes constricted relative to the diameter of the main body of the tube or sheath; except in disc florets of Asteraceae (Compositae). |
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ligule 2 |
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STRUCTURE |
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An adaxial, distal enation from a leaf sheath, especially in most grasses (Poaceae) and sedges (Cyperaceae); usually unitary and membranous, sometimes instead consisting of a row of ciliate processes. See also hastula. |
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vallecular |
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insertion |
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In or otherwise directly associated with the valleculae; esp. in fruits of Apiaceae (Umbelliferae). |
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areolate |
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relief |
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Having numerous, small, irregularly disposed, transversely angular, shallow depressions or low protrusions overall. |
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macrophyll (not recommended) |
= leaf, megaphyll; > frond, needle |
STRUCTURE |
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A principal, vegetative shoot organ borne laterally from a stem node; its vascular tissues, if any, continuous with those of the stem; undergoing no significant secondary growth; usually more or less bilaterally symmetrical; comprising a distal, usually laminar blade and/or a proximal stalk (petiole) or sheath; usually a primary site of photosynthesis. |
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bracteolate |
= bractleted |
architecture |
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Bearing or subtended by one or more bracteoles (bractlets, prophylls). |
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chaffy 1 |
= paleaceous |
pubescence |
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Of or bearing small, thin, more or less erect, papery (chartaceous) to membranous, planate trichomes. |
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papyraceous |
= chartaceous, papery |
texture |
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Very thin, flexible, and readily torn; like paper. See also membranaceous (membranous), pergamentaceous (parchment-like). |
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corniculate |
= horned |
apex |
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Bearing one or more cornicula (horns). |
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polished |
= glossy, laevigate, lustrous, shining, shiny |
reflectance |
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Uniformly reflecting a high proportion of incident light at all angles. |
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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. |
