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symmetric(al) 1 |
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plane shape |
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Divisible into essentially equal halves along one or more lines or planes. |
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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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tuberoid (root-stem) |
= dropper |
STRUCTURE |
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An axial outgrowth that descends from a bulb and eventually forms a new bulb; esp. in Orchidaceae. |
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wedge-shaped 2 |
= cuneate, obtriangular |
plane shape |
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Inversely triangular; like the outline of the broad lateral face of a wedge, broadest at the apex. See also obdeltate. |
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barbellate |
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architecture |
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Bearing one or more barbels. |
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mitriform |
= mitre-shaped |
solid shape |
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Broadest and transversely round to oval proximally, tapering bilaterally above the middle to a central peak; like a peaked hat or cap. |
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one-sided 1 |
= unilateral |
architecture |
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Having only one side, as compared with presumably equivalent, bilaterally symmetric structures. |
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coloration |
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CHARACTER |
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Hue(s), intensity(ies), and/or pattern (if any) of coloring. When more than one hue and/or intensity is involved, a term describing the pattern of contrast will be applicable, and the description as a whole should be phrased to indicate the particular role of each in the pattern; e.g., "ovaries striate, yellow on green"; "petals pink, spotted yellow basally"; "sepals green, suffused with red". |
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petiolar |
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insertion |
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Upon or otherwise directly associated with the petioles. |
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culm |
< cane, stem |
STRUCTURE |
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A stem of a sedge (Cyperaceae) or grass (Poaceae), usually hollow. Use of this term or cane instead of stem is a matter of tradition and preference, not of descriptive precision or necessity. |
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pseudostem |
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STRUCTURE |
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A structure that resembles a stem but is not part of the axial system of a shoot, lacking anatomical differentiation into nodes and internodes. |
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downy |
= pubescent |
pubescence |
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Of or bearing relatively short, slender, soft, more or less erect, capillate trichomes. See also puberulent. |
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seriate |
= cyclic, verticillate, 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 around the axis at the same level. |
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galeate |
= galeiform, helmet-shaped |
solid shape |
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Convex overall with a more or less smoothly curved apex, relatively thin-walled and essentially hollow with the interior open to one side below the distal portion; resembling a helmet. See also cucullate (cuculliform, hood-shaped), which overlaps conceptually. |
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squamella 1 pl. squamellae |
= squamule; < scale, trichome |
STRUCTURE |
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A diminutive squama (lepis). |
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vesicle |
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STRUCTURE |
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A small bladder-like part consisting of an enclosing wall or covering and an empty or fluid-filled interior, sometimes turgid; esp. in citrus fruits (hesperidia). |
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attenuate 2 |
= tapered |
plane shape |
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Gradually diminishing in width from one end to the other. |
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median |
= central, medial |
position |
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At, upon, or closely ranged about the structural or symmetrical midpoint or axis. |
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oblong 2 |
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solid shape |
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Compressed-ellipsoid, the sides approximately parallel from near one end to near the other. See also ellipsoid(al). |
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penta… |
= five-… |
prefix |
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Indicating presence of or constitution by five entities of the type denoted by the term's stem; as in pentandrous, pentacarpellate, pentacolporate. |
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crenate |
= scalloped |
margin |
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Having regularly alternating, rounded convexities and concavities oriented more or less perpendicular to the generalized perimeter. See also crenulate (small-scalloped), dentate, denticulate (small-toothed), serrate (sawtoothed), serrulate (small-sawtoothed). |
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primary root |
> taproot |
STRUCTURE |
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The one, central root directly basal to a shoot, developing directly from the embryonic radicle; the first-formed root of a plant, being the only one truly central in nature (i.e., belonging to the original central axis of the plant). All other roots of a plant develop subsequently and are lateral in nature. The primary root may be permanently dominant, developing into a taproot; otherwise it may be transitory or become functionally subordinate, with secondary and/or adventitious roots becoming dominant. |
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discolor(ous) |
> bicolor(ous) |
coloration |
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Having surfaces of different colors; esp. leaves with differently colored adaxial and abaxial surfaces. |
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seed |
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STRUCTURE |
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A mature or ripened ovule containing an embryonic sporophyte and a nutritive tissue (endosperm or perisperm) with stored food that sustains the initial growth of the embryo upon germination, except when such food reserve is stored instead in the cotyledon(s) of the embryo itself, these enclosed by one or two integuments (the testa), the whole serving as a propagule. A fertile seed (one containing a viable embryo) normally results from sexual fertilization of an egg by a sperm; however, fertile seeds are sometimes produced asexually by apomictic processes (e.g., parthenogenesis). |
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foveate |
= pitted |
relief |
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Having numerous, small, rounded depressions. See also foveolate (fine-pitted, scrobiculate). |
