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marginal |
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position |
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Upon or otherwise directly associated with the margins. |
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concentric |
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position |
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Having a center or axis of symmetry coincident with that of the context of reference. |
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bud |
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STRUCTURE |
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A rudimentary, unexpanded stem, stem branch, inflorescence, inflorescence branch, or flower, or a combination thereof, in a resting state; enveloped or not by subtending protective scales. |
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tertiary vein |
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STRUCTURE |
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A strand belonging to the third order of vasculature in a leaf or other basically laminar structure, except when that is the ultimate order (consisting of veinlets); branching from a primary or secondary vein. See also costa, lateral vein, primary vein, rib, secondary vein, veinlet. |
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elaminate |
|
architecture |
foliaceous structure |
Lacking an expanded, more or less planate, distal portion (lamina or blade). |
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anatropous |
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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). |
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fusion |
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CHARACTER |
|
Physical connection of equivalent or dissimilar structural entities (as recognized on evolutionary, morphological, anatomical, ontogenetic, and/or topological grounds). Terms that denote the interconnection of equivalent structures are predicated on a single collective subject and suffice in themselves to describe the condition; e.g., "sepals connate." However, those that denote the connection of dissimilar structures require explicit notation of each type of structure involved, in either a compound-subject construction or else a single-subject/object-of-preposition construction; e.g., "stamens and corolla adnate" or "stamens adnate to corolla." Qualifying detail is sometimes appropriate; e.g., "filaments connate basally," "filaments adnate to the petals over their lower halves." |
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micropyle |
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FEATURE |
|
The small pore in the integuments of an ovule at its apex, through which the pollen tube grows; or the corresponding aperture or scar in the coat of the seed that develops subsequently. |
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calyculus 2 pl. calyculi |
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STRUCTURE |
|
Collectively the bractlets (bracteoles) sometimes subtending (beneath or outside) the involucre in a capitulum (head); in Asteraceae (Compositae). |
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isopolar |
|
architecture |
pollen grain, spore |
Having evident polarity, the proximal and distal halves similar. |
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peripterous |
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solid shape |
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Alate with a single transversely encircling wing. |
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epibracteal |
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insertion |
|
Upon the bracts, or partially adnate thereto and apparently arising therefrom. |
|
anther |
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STRUCTURE |
|
The fertile, loculate, pollen-bearing portion of a stamen, containing one, two, or four thecae (pollen sacs), when that portion is differentiated from and borne at the summit of a narrower supporting stalk (filament), or when such differentiation is deemed to have occurred in the evolutionary past with subsequent reduction of the filament (the anther then sessile and constituting the entirety of the stamen). |
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reproduction |
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CHARACTER |
|
Type, morphology, disposition, function and/or dissemination of reproductive structures. |
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course |
|
CHARACTER |
|
Linear pattern of the centerline through the length of an axis or vein. |
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lacunate |
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relief |
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Having relatively large and deep depressions overall. |
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spikelet |
|
nominative |
inflorescence |
A compound structure belonging to the penultimate subdivisional order of a sedge or grass inflorescence; consisting of one or more florets (each a diminutive flower subtended by specialized bractlets (bracteoles) called scales or glumes in sedges, lemma and palea in grasses), spicately arranged along a common axis (rachilla), the axis and florets together subtended by one or (usually) two bracts (first and second glumes). The spikelet is usually considered to be the basic unit of inflorescence in Cyperaceae and Poaceae (Gramineae). |
|
erose 1 |
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margin |
|
Having rough, very irregular depressions throughout. |
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trilete |
|
architecture |
spore |
Having a triradiate tetrad scar. |
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gynecandrous |
|
reproduction |
taxon |
Monoecious, each inflorescence having a distal sector with only pistillate flowers and a proximal sector with only staminate ones. |
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cryptocotyloid |
|
germination |
seed |
Having the cotyledon(s) remaining inside the seed coat. |
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centripetal |
|
development |
|
Proceeding toward the center, thus more advanced peripherally than centrally within a given frame of reference. |
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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. |
|
plicate 1 |
|
aestivation |
|
Valvate with each member strongly infolded longitudinally. |
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false |
|
derivation |
indusium |
Constituting a marginal fold of the lamina as a whole and not a distinct enation from the epidermis. |
