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tooth pl. teeth |
= dens |
STRUCTURE |
|
One of a series of regularly spaced, angular, marginal convexities oriented more or less perpendicular to the generalized perimeter of a laminar structure. See also sawtooth, sawtoothlet, scallop (crena), scalloplet (crenule), toothlet. |
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caruncle |
= strophiole |
STRUCTURE |
|
An outgrowth from the seed coat (testa) around or near the hilum and micropyle, or from the raphe. |
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gland |
> nectary |
STRUCTURE |
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An anatomically distinct multicellular structure that produces and exudes a particular substance, or resembles those that do. |
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basal cell |
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STRUCTURE |
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Any of the ring of cells forming the lowermost (proximal) portion of an antheridial wall. |
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diffuse root |
> fibrous root |
STRUCTURE |
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Any member of a dense system of adventitious, slender roots that arise from the base of a main stem and functionally replace an evanescent primary root. |
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septum pl. septa |
> dissepiment, replum, trabecula |
STRUCTURE |
|
A topologically and/or texturally distinct wall or partition that separates chambers or locules within an ovary, fruit or sporangium. |
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peduncle |
<stalk, stipe (broad sense, not recommended) |
STRUCTURE |
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The common stalk, when present, of a compound inflorescence or first-order subunit thereof, or of a solitary flower that is deemed to represent an evolutionarily reduced compound inflorescence. |
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hypochilium |
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STRUCTURE |
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The proximal portion of a labellum (lip) that has distinct proximal, distal, and sometimes also central parts; in Orchidaceae. See also epichilium, mesochilium. |
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lid |
= operculum |
STRUCTURE |
|
A distal, cover-like portion of a structure whose main body is otherwise closed, transversely discontinuous with the main body around most of the circumference, or becoming partially or wholly separate by transverse dehiscence; as of a pitcher (ascidium), pollen grain, pyxis, or spore case (sporangium). |
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bursicle |
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STRUCTURE |
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A pouch- or flap-like protrusion from the stigma that encloses the caudicle of a pollinium. |
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megasporocarp |
= macrosporocarp (not recommended) |
STRUCTURE |
|
A sporocarp that bears only megasporangia. |
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pappus pl. pappi |
|
STRUCTURE |
|
A set of one or more awns (aristae, bristles, setae) or scales at the summit of an inferior ovary just beneath or outside the free portion of the corolla; persisting in the fruit (cypsela) and often aiding wind or animal dispersal; in Asteraceae (Compositae). Considered by some to be an evolutionarily modified upper calyx portion, the lower portion having been incorporated into the floral tube casing adnate to the ovary wall; considered by others to be an outgrowth from the ovary wall. |
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nodule |
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STRUCTURE |
|
A small nodiform (gongylodate, gongyloid, knob-shaped, knot-shaped) segment or protrusion; esp. in roots of Fabaceae (Leguminosae) and harboring nitrogen-fixing bacteria. |
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branch |
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STRUCTURE |
|
Any higher-order division of or outgrowth from an axis, vein or veinlet when such division or outgrowth is equivalent in nature to the structure of origin. |
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palate |
|
STRUCTURE |
|
The lower, prominent labium (lip) of a personate (gaping, ringent) corolla. |
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prothallus pl. prothalli |
|
STRUCTURE |
|
A very diminutive thallus that is reproductively mature and undergoes no further growth; in Polypodiophyta, Pinophyta. |
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mamma pl. mammae |
|
STRUCTURE |
|
A rounded-conoidal protrusion, resembling the breast of a mammal. |
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spur 1 |
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STRUCTURE |
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A hollow protrusion from a calyx or corolla, often nectariferous. |
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hypocotyl |
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STRUCTURE |
|
That portion of an embryo axis between the level of cotyledon insertion above and the root meristem (or radicle, if present) below. |
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stylopodium pl. stylopodia |
|
STRUCTURE |
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A discoid enlargement at the base of the styles; esp. in Apiaceae (Umbelliferae). |
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rostellum 1 pl. rostella |
= beaklet |
STRUCTURE |
|
A small rostrum (beak). |
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stipule |
|
STRUCTURE |
|
Any distinct, relatively diminutive, more or less foliaceous structure inserted on a stem alongside a petiole, or on a petiole near its base, and ontogenetically closely associated with the leaf; usually occurring as one of a pair disposed one to either side of the petiole. |
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megasporophyll |
= macrosporophyll (not recommended); > carpel, cone scale, ovuliferous scale |
STRUCTURE |
|
A sporophyll that bears only megasporangia and, in Pinophyta, naked ovules that develop subsequently. |
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segment |
? division, lobe |
STRUCTURE |
|
Any generally convex, major peripheral protrusion or component sector that is delimited by concavities in the surface or margin and that is not proximally distinct from the remainder of the whole. |
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pappus scale |
|
STRUCTURE |
|
A pappus element that is more or less planate and relatively thin and broad; may terminate in one or more awn- or bristle-like appendages. |
