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calyculus 2 pl. calyculi |
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STRUCTURE |
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Collectively the bractlets (bracteoles) sometimes subtending (beneath or outside) the involucre in a capitulum (head); in Asteraceae (Compositae). |
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isopolar |
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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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vesicle |
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STRUCTURE |
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A small bladder-like part consisting of an enclosing wall or covering and an empty or fluid-filled interior, sometimes turgid; esp. in citrus fruits (hesperidia). |
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epibracteal |
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insertion |
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Upon the bracts, or partially adnate thereto and apparently arising therefrom. |
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anther |
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STRUCTURE |
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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 |
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Type, morphology, disposition, function and/or dissemination of reproductive structures. |
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symmetric(al) 1 |
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plane shape |
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Divisible into essentially equal halves along one or more lines or planes. |
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course |
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CHARACTER |
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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 |
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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). |
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erose 1 |
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margin |
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Having rough, very irregular depressions throughout. |
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aquatic |
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habit |
plant |
Growing in water. |
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gynandrous |
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architecture |
flower |
Having the androecium adnate to the gynoecium. |
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tepal |
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STRUCTURE |
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Any member of an undifferentiated perianth; may be green and foliaceous or colored and petaloid, distinct or else connate with one or more others, and/or free or else adnate with one or more other floral structures. |
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cryptic |
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coloration |
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Similar to its natural background, from which it is not readily distinguished. |
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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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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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obdiplostemonous |
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architecture |
flower, androecium |
Having the stamens dicyclic, the proximal whorl with members directly above the petals, the distal whorl with members directly above the sepals. See also diplostemonous. |
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throat 2 |
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STRUCTURE |
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The fully connate portion of the limb of a disc floret, proximal to the lobes (distinct distal portions of the petals); in Asteraceae (Compositae). |
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cypsela pl. cypselae |
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nominative |
fruit |
Like an achene but derived from an inferior, bicarpellate ovary and with accessory perianth tissue adnate to the pericarp; esp. in Asteraceae (Compositae). |
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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 1 |
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STRUCTURE |
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A strap-shaped enation from or distal portion of a structure. |
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position |
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CHARACTER |
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Location or disposition with reference to some dissimilar structure(s) or larger context. The lexicons relating to position and insertion overlap to a great degree, since these two morphological concepts are often inseparable in practice. Also overlaps conceptually with arrangement, habit, orientation, and shape. |
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odorless |
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odor |
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Lacking a distinct odor. |
