|
abaxial |
= dorsal (not recommended) |
insertion |
|
On or pertaining to the side or portion of a lateral structure that faces (or would face) away from the bearing axis when (or if) the axis of the lateral structure is (or were) oriented in the same general direction as the bearing axis. |
|
abaxial |
= dorsal (not recommended) |
position |
|
On or pertaining to the side or portion of a lateral structure that faces (or would face) away from the bearing axis when (or if) the axis of the lateral structure is (or were) oriented in the same general direction as the bearing axis. |
|
abortive |
|
maturation |
spore, pollen, seed |
Never attaining functional maturity due to defective or arrested development. |
|
abrupt |
= truncate |
apex |
|
Having a distal boundary that is generally straight or plane and approximately perpendicular to the central axis. |
|
absent |
|
presence |
|
Not occurring within the context in point. |
|
acaulous |
= stemless |
architecture |
plant |
Lacking any evident, elongate, aboveground stem, other than reproductive axes, at maturity, the leaves and/or reproductive axes arising essentially at substrate level from a very short axis with highly congested nodes. |
|
accessory cell |
|
STRUCTURE |
|
One of the cytologically distinctive epidermal cells that are sometimes present in a stomate and that surround and are regularly oriented in relation to the guard cells. |
|
accessory fruit |
= anthocarp; > diclesium |
nominative |
fruit |
Simple or compound and including some tissue of non-ovarian origin (accessory tissue). |
|
accumbent |
= pleurorhizal |
arrangement |
cotyledons |
Having the two cotyledons facing and parallel (adaxial surfaces contiguous) and recurved together, one lateral edge of each abutting the hypocotyl and radicle. |
|
acephalous 1 |
= headless |
architecture |
|
Not terminated or surmounted by a head-like structure, esp. when one might be expected. |
|
acephalous 2 |
= headless |
solid shape |
|
Not terminating in a head-like portion, esp. when one might be expected. |
|
acerose |
= acicular, needle-shaped |
solid shape |
|
Rounded in cross-section and very slenderly elongate, broadest near the middle, and gradually attenuate to an acute apex and a slightly blunter base; like a needle. |
|
acetabuliform |
|
solid shape |
|
Transversely circular, broader than long, widest near or at the middle, relatively thin-walled, the hollow interior open distally; like a shallow bowl with strongly incurved sides. |
|
achene var. akene |
> caryopsis, grain (not recommended) |
nominative |
fruit |
Small, dry, indehiscent, and usually one-seeded, with the pericarp thin to thick, sometimes osseous, and adnate to the seed; derived from a single, superior, simple or compound, unicarpellate ovary. Although in traditional use caryopsis (or grain) has been treated as a type separate from achene and applied to the fruit of a grass [Poaceae (Gramineae)], they do not differ in basic morphology. See also cypsela, diclesium. |
|
achlamydeous |
= naked |
architecture |
flower |
Lacking a perianth. |
|
acicular 1 |
|
plane shape |
|
Very slenderly elongate, widest near the middle, and gradually attenuate to an acute apex and a blunter base; like the lateral outline of a needle. |
|
acicular 2 |
= acerose, needle-shaped |
solid shape |
|
Rounded in cross-section and very slenderly elongate, broadest near the middle, and gradually attenuate to an acute apex and a slightly blunter base; like a needle. |
|
aciculate |
|
coloration |
|
Having fine, irregularly oriented, straight streaks of contrasting hue and/or intensity. |
|
acinaciform |
= scimitar-shaped |
solid shape |
|
Thin and moderately arcuate with two opposite, plane, broad faces, the degree of curvature increasing distally, thinnest at the convex edge, thicker toward the concave; like a scimitar blade. |
|
acorn |
= glans |
nominative |
fruit |
A nut subtended by a persistent, hard, cap-like involucre of numerous, coherent, imbricate bracts; esp. in Fagaceae. |
|
acrid 1 |
= pungent |
apex |
|
Terminating abruptly in a rigid, relatively short, sharp point composed of both vascular and laminar tissues. |
|
acrid 2 |
= pungent |
odor |
|
Sharp or astringent. |
|
acrocaulous |
|
insertion |
|
At or very near the stem tip. |
|
acrocaulous |
|
position |
|
At or very near the stem tip. |
|
acrodromous |
|
venation |
|
Having two or more primary and/or strongly developed secondary veins that diverge at or above the laminar base and are thence convergently arcuate toward the apex, reaching it or not. |