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involucral |
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derivation |
aril |
Produced from or a modification of a persistent involucre investing the seed. |
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involucral bract |
= phyllary; < bract (broad sense) |
STRUCTURE |
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One of the bracts composing the involucre of a capitulum (head,); in Asteraceae (Compositae). |
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involucrate 1 |
|
architecture |
inflorescence |
Subtended by an involucre. |
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involucrate 2 |
|
architecture |
capitulum (head) |
Having an involucre. |
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involucre 1 |
|
STRUCTURE |
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One or more closely proximate whorls, or a compact spiral, of bracts immediately subtending an inflorescence, the bracts sometimes leaf-like, sometimes petaloid. |
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involucre 2 |
|
STRUCTURE |
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One or more closely proximate whorls, or a compact spiral, of bracts (phyllaries) surrounding (proximal to) the compound receptacle (torus) and florets of a capitulum (head); in Asteraceae (Compositae). |
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involute 1 |
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margin |
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Rolled adaxially. |
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involute 2 |
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vernation |
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Each rolled adaxially from the lateral margins. |
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iridescent |
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coloration |
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Reflecting a pattern colors from throughout the visible spectrum, the pattern changing with the angle of view. |
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irregular 1 |
|
architecture |
perianth, calyx, corolla |
Imperfectly actinomorphic, the constituents disposed symmetrically but unequal in size and/or shape. See also peloric. |
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irregular 2 |
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course |
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Deviating asymmetrically from a straight line. |
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isodiametric |
|
architecture |
|
Of approximately constant breadth in all median planes. |
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isopetalous |
|
architecture |
flower, perianth, corolla |
Having the petals essentially alike in size and shape. |
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isopolar |
|
architecture |
pollen grain, spore |
Having evident polarity, the proximal and distal halves similar. |
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isosepalous |
|
architecture |
flower, perianth, calyx |
Having the sepals essentially alike in size and shape. |
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isostemonous |
|
architecture |
flower, androecium |
Having the stamens essentially alike in size and shape. |
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isthmus |
|
STRUCTURE |
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A narrower portion connecting two wider or broader portions of an inclusive structure. |
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jacket cell |
|
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 |
|
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 |
|
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 |
|
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 |
|
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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keel-shaped |
= cariniform |
solid shape |
|
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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keeled |
= carinate |
solid shape |
|
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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kidney-shaped 1 |
= reniform |
plane shape |
|
Broadly elongate and arcuate, each end bluntly rounded; like the generalized outline of the broad face of a human kidney. |
