|
architecture |
|
CHARACTER |
|
Composite structural configuration as to type, orientation, symmetry, insertion, position, fusion, presence, number, relative size, shape, texture, differentiation, and/or derivation of components and features. Overlaps conceptually with habit. |
|
arching |
= recurved |
orientation |
|
Curving backward or downward. |
|
archegonium pl. archegonia |
|
STRUCTURE |
|
A female gametangium; a multicellular fertile organ of a mature gametophyte within which female gametes (eggs, ova) are produced and fertilized; having a broad, bulbous base and a narrower distal neck. Technically present but highly reduced and of no descriptive significance in Magnoliophyta. |
|
arborescent |
< tree-form |
habit |
plant |
Developing the character of a tree. See also arboreous, bushy, frutescent, fruticose, subshrubby, suffrutescent, suffruticose, woody-clumping. |
|
arboreous |
< tree-form |
habit |
plant |
Having the character of a tree. See also arborescent, bushy, frutescent, fruticose, subshrubby, suffrutescent, suffruticose, woody-clumping. |
|
arachnoid |
= cobwebby |
pubescence |
|
Of fairly sparse, fine, white, loosely tangled, capillate trichomes. |
|
aquatic |
|
habit |
plant |
Growing in water. |
|
approximate |
= close |
arrangement |
|
Disposed relatively near to one another. |
|
appressed |
|
orientation |
lateral structure |
Angled at or near the base and closely flattened against the surface of the bearing structure, thus more or less parallel to it. |
|
appendage |
|
STRUCTURE |
|
Any subordinate structure ontogenetically derived from and associated with a given organ or part. |
|
apotropous |
|
orientation |
ovule |
Anatropous but the whole recurved such that the raphe (adnate portion of the funiculus) faces the ovary wall (placenta) and the ovule is parallel to it, the micropyle facing the free basal portion of the funiculus. |
|
apostemonous |
|
architecture |
flower, androecium |
Having two or more distinct stamens; having the stamens unfused. |
|
aposporous |
< apomictic, asexual |
reproduction |
taxon, plant |
Producing new gametophytes from the sporophytes asexually, without intervening meiosis (or spores). |
|
aposepalous |
= chorisepalous, dialysepalous, polysepalous |
architecture |
flower, perianth, calyx |
Having two or more distinct sepals; having the sepals unfused. |
|
apopetalous |
= choripetalous, dialypetalous, polypetalous |
architecture |
flower, perianth, corolla |
Having two or more distinct petals; having the petals unfused. |
|
apomictic |
= asexual; > agamospermous, apogamous, aposporous, vegetative |
reproduction |
taxon, plant |
Producing new plants by means not involving meiosis or fertilization. |
|
apolar |
|
architecture |
pollen grain, spore |
Lacking morphologically evident polarity. |
|
apogamous |
< apomictic, asexual |
reproduction |
taxon, plant |
Producing new sporophytes from the gametophytes asexually, without intervening fertilization (or gametes). |
|
apocarpous |
|
architecture |
flower, gynoecium |
Having two or more simple pistils (carpels). |
|
apiculum 2 pl. apicula |
|
STRUCTURE |
|
The apex of a connective, when prolonged above the union of the anthers. |
|
apiculum 1 pl. apicula |
|
STRUCTURE |
|
A short, slender, angular tip that is not notably harder or stiffer than the main body of the bearing structure. See also mucro. |
|
apiculate |
|
apex |
|
Terminating abruptly in a short, slender, angular tip that is not notably harder or stiffer than the main body of the structure. See also mucronate, mucronulate. |
|
apical |
< distal |
insertion |
|
At or very near the developmental end or tip (apex) of a structure. |
|
apical |
< distal |
position |
|
At or very near the developmental end or tip (apex) of a structure. |
|
aphyllous |
= leafless |
architecture |
plant, axis |
Not bearing leaves. |
