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operculum pl. opercula |
= lid |
STRUCTURE |
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A distal, cover-like portion of a structure whose main body is otherwise closed, transversely discontinuous with the main body around most of the circumference, or becoming partially or wholly separate by transverse dehiscence; as of an ascidium (pitcher), pollen grain, pyxis, or sporangium (spore case). |
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biconvex 1 |
= lens-shaped, lenticular |
plane shape |
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Elongate, narrow, broadest at the middle, attenuate to acute ends, the sides convex; like the outline of a double-convex lens viewed from its edge. |
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craspedodromous, mixed- |
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venation |
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Having a midvein that branches to either side along the length of the lamina, the secondary veins running thence toward the margin, some becoming indistinct before reaching it, others terminating there. |
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squamose |
= lepidote, squamate; < scaly |
pubescence |
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Bearing squamae (lepides). See also squamellose. |
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prickly |
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architecture |
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Bearing prickles. |
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loose 1 |
= lax |
architecture |
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Having equivalent constituent parts disposed distant from one another. |
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twig |
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STRUCTURE |
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The terminal portion of an ultimate branch of a woody stem, representing the most recent increment of growth and bearing or having borne the current or most recent increment of leaves. See also branchlet. |
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ala 1 pl. alae |
= wing |
STRUCTURE |
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Any elongate, relatively thin protrusion or appendage. |
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…fossulate |
= …colpate, …furrowed, …grooved, …sulcate, …valleculate |
architecture |
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Having the number of fossulae indicated by the prefix; as in unifossulate, multifossulate, 5-fossulate. |
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seta 1 pl. setae |
= arista, awn, bristle |
STRUCTURE |
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A slender, more or less straight and stiff, fine-pointed, terminal or subterminal appendage or prolongation, sometimes a continuation of the bearing structure's central primary vein, as on a glume, lemma, or palea in Poaceae (Gramineae). |
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diamond-shaped |
= rhomboid |
solid shape |
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Transversely square, broadest and longitudinally angular at the middle, regularly attenuate to angular ends, all faces essentially plane; like the stylized shape of a diamond. |
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campanulate |
= bell-shaped |
solid shape |
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Circular in transverse section, inflated proximally, thence broadening gradually to a flared distal portion. |
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kidney-shaped 1 |
= reniform |
plane shape |
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Broadly elongate and arcuate, each end bluntly rounded; like the generalized outline of the broad face of a human kidney. |
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ramentaceous |
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pubescence |
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Of small, fragile, scarious, planate trichomes. |
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mound-shaped |
= cushion-shaped, pulvinate, pulviniform |
solid shape |
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Essentially round in transverse section, much broader than long or high, with a convex distal face that intersects either a more or less plane proximal face or, when the structure is sessile, its bearing surface. |
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coriaceous |
= leathery |
texture |
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Moderately thick, tough, and very pliable. |
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…grooved |
= …colpate, …fossulate, …furrowed, …sulcate, …valleculate |
architecture |
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Having the number of grooves indicated by the prefix; as in three-grooved, 5-grooved. |
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spinulose |
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margin |
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Finely spinose. |
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eight-… |
= octa… |
prefix |
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Indicating presence of or constitution by eight entities of the type denoted by the term's stem; as in eight-carpelled, eight-flowered, eight-stamened. |
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pneumatophore |
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STRUCTURE |
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A structurally and functionally specialized root serving as an aboveground aerating organ; found in some woody taxa of wet habitats, notably some mangroves. |
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tartareous |
= tartar-like |
relief |
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Rough and crumbling spontaneously, becoming erose. |
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teardrop-shaped 1 |
= lacrimate |
plane shape |
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Broadest just below the middle, broadly rounded to the base, and acutely attenuate to the apex; like the stylized lateral outline of a teardrop. |
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limb 1 |
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STRUCTURE |
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A relatively broad portion of a syntepalous (gamotepalous) perianth, synsepalous (gamosepalous) calyx, or sympetalous (gamopetalous) corolla distal to a narrower tube, spreading outward or ascending from the tube, comprising the distinct or connate distal portions of the tepals, sepals, or petals; except in bisexual or staminate disc florets of Asteraceae (Compositae). |
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rounded |
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apex |
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Convex overall and more or less regularly curved. |
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acrocaulous |
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insertion |
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At or very near the stem tip. |
