retrorse |
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orientation |
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Directed generally backward, toward the proximal end of the context of reference, parallel or at an acute angle to the bearing structure. |
seedling |
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PLANT |
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A plant in the first stages of its growth following emergence from the seed. |
free-central |
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placentation |
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Upon the free axial column of a compound, unilocular ovary. |
spinulose |
|
architecture |
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Finely spinose. |
friable |
= brittle |
texture |
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Dry, firm and easily broken. |
spinulose |
|
margin |
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Finely spinose. |
heart-shaped 2 |
= cordate |
plane shape |
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Fairly regularly attenuate from a broad, bilobate base to a narrow apex, the lobes large, rounded, retrorse, and intersecting; like the stylized outline of the broad lateral face of a heart. See also obcordate. |
subpetiolar |
|
insertion |
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Just below the point of petiole insertion. |
internodal |
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position |
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Upon or otherwise directly associated with the internodes. |
tiered |
|
arrangement |
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In two or more rows that are arrayed one above another. |
limb 1 |
|
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). |
acyclic |
= helical, spiral |
arrangement |
|
Disposed helically about and along the axis, each on a different radius than the one(s) vertically adjacent. |
arillode |
< aril (broad sense) |
STRUCTURE |
|
A "false" aril; an appendicular structure that wholly or partly envelops a seed and is produced from or a modification of the outer integument or (in some Pinophyta) a subtending involucre, but not from the funicle or raphe, and thus is not ontogenetically derived from the placenta; usually fleshy or pulpy, sometimes spongy or tufted-capillate, often brightly colored. |
macrostrobilus pl. macrostrobili (not recommended) |
= female cone, megastrobilus |
STRUCTURE |
|
A strobilus (cone) whose fertile organs are all megasporophylls. |
branch |
|
STRUCTURE |
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Any higher-order division of or outgrowth from an axis, vein or veinlet when such division or outgrowth is equivalent in nature to the structure of origin. |
non-porous |
|
porosity |
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Lacking vessels, the tracheary elements limited to tracheids and, sometimes, fiber-tracheids. |
channeled |
= canaliculate |
solid shape |
|
Having a longitudinal, transversely rounded depression; esp. a petiole or petiolule. |
parietal |
|
placentation |
|
Upon the inner wall surface of a unilocular ovary, thus peripheral within the locule. |
corona pl. coronae, coronas |
> gynostegium |
STRUCTURE |
|
A crown-like set of connate or distinct appendages or enations borne upon a corolla or androecium or between them. |
poly… |
= many-…, multi…, pluri… |
prefix |
|
Indicating presence of or constitution by a relatively large number of entities of the type denoted by the term's stem; as in polyadelphous, polyandrous, polycarpellate. See also entries for particular terms with this prefix whose meanings, at least in some applications, are more specific than usually indicated by such combination;and also oligo… (few-…). |
ray floret |
|
STRUCTURE |
|
A floret that has a zygomorphic corolla, is pistillate (either fertile or sterile) or neuter, and is borne in a radiate capitulum (head) peripheral (proximal) to the disc florets; in Asteraceae (Compositae). |
epipetalous |
|
insertion |
|
Upon the petals, or partially adnate thereto and apparently arising therefrom. |
floral tube |
= floral cup (broad sense), hypanthium (broad sense) |
STRUCTURE |
|
A complex structure comprising fused portions of the perianth and/or androecium of a flower, sometimes also including receptacular tissue; surrounding and wholly, partly, or not at all adnate to the gynoecium; subdivided morphologically into casing, collar and/or neck; sometimes bearing free distal portions of the constituent structures. |
sorus pl. sori |
|
STRUCTURE |
|
A cluster of sporangia borne upon a fertile frond, usually on its abaxial surface; often covered during maturation by a protective membrane, the indusium, that is an outgrowth from the epidermis; in Polypodiophyta. |
gynostegium pl. gynostegia |
< corona |
STRUCTURE |
|
An androecial corona, typically consisting of distinct hood- and/or horn-shaped enations that rise above the anthers; esp. in Asclepiadaceae. |