flexuose |
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course |
|
See flexuous. |
spike |
|
nominative |
inflorescence |
An elongate, determinate or usually indeterminate axis bearing sessile flowers inserted singly along it, unbranched or sometimes bearing lateral branches of the same nature. |
pseudomonadal |
|
arrangement |
pollen |
Apparently monadal but each grain actually comprising an unseparated original tetrad in which the contiguous walls between component grains have dissolved. |
perfoliate |
|
architecture |
foliaceous structure |
Having a sessile lamina (blade) that uninterruptedly encircles the bearing axis, which thus passes through it at some point within the margin. See also amplexicaulous, connate-perfoliate. |
stigma pl. stigmata, stigmas |
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STRUCTURE |
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An exposed, localized portion of a pistil that retains deposited pollen and stimulates its germination, the pollen tubes then growing through or along it toward the ovule(s). |
areolate |
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relief |
|
Having numerous, small, irregularly disposed, transversely angular, shallow depressions or low protrusions overall. |
cotyliform |
|
solid shape |
perianth, calyx, corolla |
Having a short, relatively broad, cupulate tube and a well differentiated, erect limb. See also cyathiform, urceolate (urn-shaped). |
strigose |
|
pubescence |
|
Bearing sharp, rigid, appressed, capillate trichomes. See also strigillose (strigulose). |
superposed 1 |
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arrangement |
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Approximate to congested, inserted directly above and below one another. |
emergent |
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location |
plant, structure of aquatic plant |
Rising from beneath the water surface to a point above it. |
anatropous |
|
orientation |
ovule |
Having the funiculus distally recurved and the (straight) ovule lying beside and parallel to the proximal portion of the funiculus, to which it may be adnate or adherent, the micropyle facing the ovary wall (placenta). |
epiphytic |
|
habit |
plant |
Physically supported in its entirety by another plant through all or the major part of its life. |
discal |
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position |
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Upon or otherwise directly associated with the floral disc. |
capitulescence |
|
architecture |
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Mode or progressive pattern of bearing capitula (heads); most appropriately described using adjectival terms; esp. in Asteraceae (Compositae). |
basal cell |
|
STRUCTURE |
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Any of the ring of cells forming the lowermost (proximal) portion of an antheridial wall. |
brochidodromous |
|
venation |
|
Having a single median primary vein that branches to either side along its length, the secondary veins incurving strongly near but short of the margin, interconnecting serially, and forming a succession of marginal loops. |
thermocleistogamous |
|
reproduction |
flower |
Normally chasmogamous but facultatively cleistogamous during periods of lower-than-normal temperature. |
ray floret |
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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). |
microsporocarp |
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STRUCTURE |
|
A sporocarp that bears only microsporangia. |
autotrophic |
|
nutrition |
plant |
Independent of other organisms for its nourishment, itself synthesizing all essential substances not directly available from the non-living environment. |
seedling |
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PLANT |
|
A plant in the first stages of its growth following emergence from the seed. |
leaf scar |
|
FEATURE |
|
A scar on a twig or stem due to abscission of a megaphyll; having an outline like that of a transverse section through the base of the petiole, sheath, or blade that was inserted there. |
mucronate |
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apex |
|
Terminating abruptly in a short, hard point that is a continuation of vascular tissue. See also apiculate, mucronulate. |
acropetal |
|
development |
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Proceeding toward the apex, thus more advanced basally or proximally than apically or distally within a given frame of reference. |
pollinial |
|
arrangement |
pollen |
Polyadal with the grains of individual thecae (pollen sacs), or of fused thecae, compacted and forming tightly coherent masses (pollinia) that constitute the basic dispersal units, these sometimes distally attenuate to a sterile caudicle (translator arm), sometimes united by caudicles in groups of two or more, the caudicle(s) sometimes attached to a viscidium, either directly or through an intervening stipe; esp. in Asclepiadaceae, Orchidaceae. |