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isthmus |
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STRUCTURE |
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A narrower portion connecting two wider or broader portions of an inclusive structure. |
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jacket cell |
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STRUCTURE |
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Any of the cells forming the portion of an antheridial wall between the basal cells and the cap cell(s). |
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joint |
= articulation |
STRUCTURE |
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A distinct, relatively narrow zone of demarcation between adjacent main portions of an elongate structure, often thicker than the rest of the structure and sometimes a site of eventual abscission. |
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jointed |
= articulate(d) |
architecture |
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Elongate with one or more distinct, relatively narrow zones of demarcation between adjacent main portions of the whole, these joints (articulations) often thicker and sometimes sites of eventual abscission. |
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keel 1 |
= carina |
STRUCTURE |
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An elongate, median longitudinal ridge that is basically triangular in transverse section and resembles the keel of a boat; esp. in leaf blades and sheaths, glumes, lemmata, paleae, sepals, petals. |
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keel 2 |
= carina |
STRUCTURE |
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Collectively, the two relatively small, connate or coherent, abaxial (lower) petals that form the keel-like portion of a papilionaceous corolla. |
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keeled |
= carinate |
solid shape |
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Having an elongate median longitudinal ridge that is basically triangular in transverse section, resembling the keel of a boat; esp. a leaf blade or sheath, glume, lemma, palea, sepal or petal. |
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keel-shaped |
= cariniform |
solid shape |
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Elongate, basically triangular in transverse section, tapering at one or both ends, the outer edge thus somewhat arcuate, the whole resembling the keel of a boat. |
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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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kidney-shaped 2 |
= reniform |
solid shape |
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Thickly elongate and arcuate, circular or compressed-circular in transverse section, each end bluntly rounded; like the generalized shape of a human kidney. |
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knee 1 |
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STRUCTURE |
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An abrupt bend in an axial or other elongate structure. |
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knee 2 |
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STRUCTURE |
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An emergent portion of an otherwise normally submerged secondary root of a wetland tree, resembling a bent human knee. |
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knee root |
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STRUCTURE |
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A specialized secondary root of a wetland tree, a portion of which projects above mean water level and appears to bend as a leg does at the knee, its distalmost portion being anchored in the substrate beneath the water. The knee of the root is commonly regarded as a conduit for gas exchange between root interior and atmosphere, a function whose need is posited on the basis of the highly anaerobic and saturated conditions prevailing in wetland substrates. |
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kneecap-shaped |
= patelliform |
solid shape |
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Thickly meniscoid, like a human kneecap. |
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kneed |
= geniculate |
solid shape |
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Elongate, abruptly bent, somewhat thicker at the angle, and appearing as though articulate like a leg at the knee. |
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knee-rooted |
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architecture |
plant |
Having knee roots. |
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knobby |
= knotty, nodose |
solid shape |
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Having knob-shaped (gongylodate, gongyloid, knot-shaped, nodiform) protrusions. See also nodulose. |
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knob-shaped |
= gongylodate, gongyloid, knot-shaped, nodiform |
solid shape |
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Approximately globose, the surface convoluted or not, like a knob or knot; usually applied only to structures or components that are relatively small. |
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knot-shaped |
= gongylodate, gongyloid, knob-shaped, nodiform |
solid shape |
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Approximately globose, the surface convoluted or not, like a knob or knot; usually applied only to structures or components that are relatively small. |
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knotted |
= torulose |
solid shape |
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Elongate and irregularly round in transverse section with narrow irregular constrictions and intervening, closely proximate gongyloid sectors, the whole straight or variously curved; serially gongyloid; like a sequentially knotted rope. |
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knotty |
= knobby, nodose |
solid shape |
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Having knot-shaped (gongylodate, gongyloid, knob-shaped, nodiform) protrusions. See also nodulose. |
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labellum pl. labella |
< labium, lip |
STRUCTURE |
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The third petal of a tripetalous flower when distinctively different from the other two, usually enlarged relative to them and/or differently shaped or colored, usually apparently the abaxial (lower) petal of the three due to resupination during ontogenesis; esp. in Orchidaceae. |
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labiate |
= lipped; > bilabiate, one-lipped, two-lipped, unilabiate |
architecture |
perianth, calyx, corolla |
Strongly zygomorphic with connate and/or coherent members some or all of whose distal portions form one or two lip-like structures. |
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labium pl. labia |
= lip; > labellum |
STRUCTURE |
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Any substructure that resembles a lip, especially a portion of a perianth, calyx or corolla; in Lamiaceae (Labiatae) sometimes restricted to the abaxial (lower) of the two corolla lips. |
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lacerate |
= cut, incised, torn; > laciniate, slashed |
plane shape |
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Having straight to irregular lines of separation extending inward from the margin. See also cleft (dissected, divided, lobate, lobed, parted, partite, segmented). |
