|
explosive |
|
dehiscence |
|
Opening abruptly with almost instantaneous aperture formation and release of accumulated structural tensions, the contents thus forcibly expelled. |
|
tetrad |
|
STRUCTURE |
|
A group of four pollen grains originating from a single pollen mother cell. |
|
polycarpic |
|
reproduction |
plant |
Normally fruiting repeatedly prior to senescence. |
|
bud scale |
|
STRUCTURE |
|
A scale that, alone or aggregated with others, envelops and protects a bud. |
|
hemiepiphytic |
|
habit |
plant |
Partially epiphytic; rooted in the ground but with stems growing upon and supported mainly by other plants. |
|
saprophytic |
|
nutrition |
plant |
Heterotrophic and obtaining essential nourishment directly from the decomposing remains of other organisms. |
|
deltate |
|
plane shape |
|
Equilaterally triangular, broadest at the base, and regularly attenuate to an angular apex. See also obdeltate. |
|
anchoring |
|
habit |
trichome |
Serving as a means of attachment to some external support. |
|
prolate |
|
solid shape |
|
Symmetrically elongate parallel to the developmental or polar axis. |
|
calyptra pl. calyptrae |
|
STRUCTURE |
|
A distal hood- or lid-like portion that detaches as a unit from the remainder of the structure; esp. in some Papaveraceae the unopened calyx that separates from the rest of the flower at anthesis. |
|
homogamous 1 |
|
maturation |
bisexual flower |
Having the androecium and gynoecium become functionally mature concurrently. |
|
diffuse-porous |
|
porosity |
|
Homogeneously porous, the vessels not differentially disposed by size or number. |
|
flagellum pl. flagella |
|
STRUCTURE |
|
A very slender whip-like structure that extends from the main body of an antherozoid and, by active undulation, propels the cell through a liquid medium. |
|
prop root |
|
STRUCTURE |
|
A relatively stout adventitious root arising from the lower portion of a main stem and extending outward and downward toward the substrate, within which it ultimately becomes anchored, thus buttressing the aboveground portion of the plant. |
|
hyponastic |
|
development |
laminar structure |
Having the abaxial surface differentiating and growing faster than the adaxial surface, thus, until maturity, development of the former more advanced than the latter at any given time and the structure as a whole involute or incurved. |
|
palinactinodromous |
|
venation |
|
Compound actinodromous, with higher-order branch radiations above the level of and similar to the primary one. |
|
sellaeform |
|
solid shape |
|
See selliform. |
|
twig |
|
STRUCTURE |
|
The terminal portion of an ultimate branch of a woody stem, representing the most recent increment of growth and bearing or having borne the current or most recent increment of leaves. See also branchlet. |
|
centripetal |
|
development |
|
Proceeding toward the center, thus more advanced peripherally than centrally within a given frame of reference. |
|
foliar |
|
insertion |
|
Upon or otherwise directly associated with the leaves. |
|
inflexed |
|
orientation |
|
Bent adaxially at some point along its length. |
|
asepalous |
|
architecture |
flower, perianth |
Lacking sepals. |
|
circular |
|
arrangement |
bundle scars |
Forming a circle. |
|
full |
|
extent |
|
Reaching from the ovary wall or pericarp to the center of the ovary or fruit and from the apex to the base of its interior, thus separating adjacent locules completely. |
|
radiant 1 |
|
architecture |
capitulum (head) |
Bearing one or more peripheral series of florets that are bisexual, pistillate, or neuter and that have relatively large actinomorphic corollas, and one or more central series of usually bisexual florets that have relatively small actinomorphic corollas; in Asteraceae (Compositae). |
