aseptate |
|
architecture |
|
Lacking internal walls or partitions (septae). |
asexual |
= apomictic; > agamospermous, apogamous, aposporous, vegetative |
reproduction |
taxon, plant |
Producing new plants by means not involving meiosis or fertilization. |
assurgent |
= ascending, upcurved |
orientation |
lateral structure |
Spreading at the base and then curving upward or forward, the distal portion more or less parallel to the bearing structure. |
astomatiferous |
= non-stomate-bearing |
architecture |
|
Lacking stomates in the epidermis. |
asymmetric(al) 1 |
|
architecture |
|
Not divisible into essentially equal halves along any line or plane. |
asymmetric(al) 1 |
|
plane shape |
|
Not divisible into essentially equal halves along any line or plane. |
asymmetric(al) 1 |
|
solid shape |
|
Not divisible into essentially equal halves along any line or plane. |
asymmetric(al) 2 |
|
architecture |
flower |
Having the perianth members in whorls that are irregular and/or unequal in number of members. |
atropous |
= orthotropous |
orientation |
ovule |
Having the (straight) ovule sessile or funiculate and divaricate, the micropyle facing away from the ovary wall (placenta). |
attenuate 1 |
= concave-tapered |
base |
|
Gradually diminishing in width or diameter toward the proximal end, the sides longitudinally concave. Corresponds with acuminate for apex shape. |
attenuate 2 |
= tapered |
plane shape |
|
Gradually diminishing in width from one end to the other. |
attenuate 2 |
= tapered |
solid shape |
|
Gradually diminishing in breadth or diameter from one end to the other. |
auricle |
= ear |
STRUCTURE |
|
A small, rounded, lateral lobe at the base of a laminar structure, lying in more or less the same plane as the remainder of the lamina. |
auriculate |
= eared |
base |
laminar structure |
Having two small, rounded, lateral lobes, one to either side, that lie in more or less the same plane as the remainder of the lamina. |
auriform |
= ear-shaped |
solid shape |
|
Resembling a mammalian outer ear. |
autogamous |
= automictic, idiogamous, self-fertilizing, selfing; > geitonogamous |
reproduction |
taxon |
Having fertilization regularly involving gametes derived from the same plant. |
automictic |
= autogamous, idiogamous, self-fertilizing, selfing; > geitonogamous, |
reproduction |
taxon |
Having fertilization regularly involving gametes derived from the same plant. |
autotrophic |
|
nutrition |
plant |
Independent of other organisms for its nourishment, itself synthesizing all essential substances not directly available from the non-living environment. |
awl-shaped 1 |
= subulate |
plane shape |
|
Narrowly triangular or truncate-triangular and broadest at the base; like the outline of the lateral face of an awl. |
awl-shaped 2 |
= subulate |
solid shape |
|
Slender, essentially terete, and straight, gradually attenuate from a relatively narrow base to a very narrow, blunt to angular apex. |
awn |
= arista, bristle, seta |
STRUCTURE |
|
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). |
awned |
= aristate, bristled |
apex |
|
Bearing one or more awns (aristae, bristles, setae). |
axe-shaped |
= dolabriform |
solid shape |
|
Elongate, basally terete, becoming strongly compressed toward an abruptly and unilaterally broader apex; like an axe (handle plus head). |
axehead-shaped |
= dolabrate |
solid shape |
|
Like an axe head oriented cutting edge downward. |
axil |
|
FEATURE |
|
The space bounded by and near the vertex of the distal angle between a lateral structure, especially a leaf, and the axis that bears it. |