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floret |
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STRUCTURE |
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A very small, structurally specialized flower, especially when occurring in capitulum (head; Asteraceae), or in a spikelet (Poaceae), where it includes the immediately subtending bracts (lemma and palea). |
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pterocaulous |
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architecture |
plant |
Having alate (winged) stems. |
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weak |
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texture |
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Very pliable and unresilient. |
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prominence |
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CHARACTER |
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Elevation or depression of a discrete feature relative to the surrounding surface. |
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rounded |
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apex |
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Convex overall and more or less regularly curved. |
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calyx pl. calyces |
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STRUCTURE |
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Collectively, the sepals of a flower, whether distinct or connate; the outer or proximal envelope of a differentiated perianth, whether the other envelope (corolla) is also actually present or is deemed to be secondarily absent due to evolutionary reduction. |
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antisepalous |
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position |
equivalent floral structures |
Each inserted directly above or below a sepal. In place of this term, the phrase "opposite the sepals" is often used, but that contradicts the sense of opposite as otherwise employed (arrangement of lateral structures along an axis) and should be avoided. |
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scorpioid-cymose |
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architecture |
inflorescence |
Comprising one or more scorpioid cymes. See also cincinnate, helicoid-cymose. |
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antrorse |
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orientation |
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Directed forward or upward, toward the distal end of the context of reference, parallel or at an acute angle to the bearing structure. |
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homosporous |
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reproduction |
taxon |
Producing only one type of spore, each spore giving rise to a gametophyte that bears gametangia of both sexual types. |
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interrupted 1 |
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architecture |
foliaceous structure |
Compound with the leaflets alternately large and small. |
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centrifugal |
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development |
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Proceeding away from the center, thus more advanced centrally than peripherally within a given frame of reference. |
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asymmetric(al) 1 |
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architecture |
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Not divisible into essentially equal halves along any line or plane. |
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inflated |
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solid shape |
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Relatively thin-walled with an essentially empty interior largely enclosed by the walls, which are convex overall and appear taut, as though from internal pressure. See also swollen (turgid, tumid), which is not clearly distinct in its application. |
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lamella pl. lamellae |
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STRUCTURE |
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A thin layer of tissue that forms a plate within tissue of lesser density or between areas of empty space. |
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areolate |
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relief |
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Having numerous, small, irregularly disposed, transversely angular, shallow depressions or low protrusions overall. |
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spadix pl. spadices |
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STRUCTURE |
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A thick, fleshy, primary inflorescence axis bearing sessile flowers more or less sunken into its surface, the whole subtended and sometimes partially enclosed by a specialized bract, the spathe; esp. in Araceae. |
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circinate 2 |
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vernation |
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Having each leaf (frond) rolled adaxially from the sides and downward from the apex, forming a tight, flat coil; esp. in Polypodiophyta. |
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ligule 2 |
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STRUCTURE |
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An adaxial, distal enation from a leaf sheath, especially in most grasses (Poaceae) and sedges (Cyperaceae); usually unitary and membranous, sometimes instead consisting of a row of ciliate processes. See also hastula. |
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barb 2 |
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STRUCTURE |
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A trichome terminated by one or two small, relatively short, stiff, sharp, acutely reflexed appendages. |
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allagostemonous |
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architecture |
flower, androecium |
Having the stamens inserted alternately upon petals and the receptacle. |
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mamma pl. mammae |
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STRUCTURE |
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A rounded-conoidal protrusion, resembling the breast of a mammal. |
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loculicidal |
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dehiscence |
fruit |
Splitting longitudinally through the outer wall(s) and directly into the locule(s), between the sutures, if any. |
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andropetalous 2 |
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derivation |
flower, perianth, corolla |
Having some or all petals derived from stamens. |
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monochasium pl. monochasia |
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nominative |
inflorescence |
Determinate and falsely dichotomous with each axial segment bearing a single, sessile terminal flower; presumably derived from a dichasium by loss of the lateral flowers. See also cincinnus, cyme, cymule, dichasium, helicoid cyme, scorpioid cyme. |
