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Colporate pollen
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Referring to a pollen grain with composite apertures, each consisting of a furrow and a pore. |
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Colpus (plural = colpi)
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An elongated aperture in the wall of a pollen grain. |
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Column
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In the Orchidaceae, the structure formed by the fused androecium and gynoecium. |
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Column wing
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In the Orchidaceae referring to a broadening of the column towards the apice which is normally lateral, but may be curved upward or downward. |
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Commissure
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In the Apiaceae, the structure by which two carpels join one another. |
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Complete flower
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A flower with all whorls of floral parts; i.e., calyx, corolla, stamen(s), and gynoecium. Compare with incomplete flower. |
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Compound pistil
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A gynoecium composed of more than one carpel, same as compound ovary. |
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Connective
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The tissue connecting the thecae of the anther and sometimes prolonged beyond its apex. |
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Convolute
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Referring to a type of aestivation in which one margin of a petal or sepal is always to the outside of the adjacent one and the opposite margin is always to the inside of the adjacent one. |
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Coralline
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Referring to a structure (e.g., corona) that appears like a corolla. |
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Corolla
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The second whorl of floral parts; the collective term for the petals. |
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Corolla lobe
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In a symetalous corolla, the upper, free segments. |
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Corolla throat
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In a sympetalous corolla, the opening into the corolla tube. |
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Corolla tube
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In a gamopetalous corolla, the lower fused part. |
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Corona
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A structure located between the petals and the stamens of some flowers and derived from either of these organs; e.g., in Passiflora (Passifloraceae), some Apocynaceae subfamily Asclepiadoideae, and some Melastomataceae. |
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Corpus
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Body; e.g., the main part of the style head in Apocynaceae. |
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Corpusculum
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A structure connecting the two translators of the pollinia of Apocynaceae subfamily Asclepiadoideae, sometimes referred to as the “gland.” |
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Crassinucellate ovules
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The presence of two or more cell layers between the megasporophyte and the epidermal cells in the early development of the megasporophyte which will develop into the ovule. |
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Diadelphous stamens
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Stamens united into two, often unequal, sets; e.g., those of many Fabaceae, which have nine stamens in one set and one stamen in the other. |
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Didynamous stamens
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With two pairs of stamens of unequal length. |
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Differentiated anthers
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Referring to anthers that bear two types of pollen: 1) fertile pollen that is transferred to other flowers to effect fertilization and 2) sterile (= fodder) pollen that serves as a pollinator reward. The two types of pollen may differ in their ability to germinate, in their color (fodder pollen is often yellow), and in their morphology (e.g., the fertile anthers of Couroupita guianensis are in monads and the sterile ones are in tetrads), and their location (e. g., the fertile anthers are near the stigma and the sterile ones are in a group separate from the stigma in many species of Swartzia. |
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Diplostemony (diplostemonous)
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With two series of stamens; those of the outer series inserted opposite the sepals, those of the inner series inserted opposite the petals. Compare with obdiplostemonous. Diplostemony is sometimes very difficult to determine in flowers at anthesis but becomes apparent with microtome and SEM studies of bud development of obdiplostemony which is also applicable to diplostemony (Endress, 2010). |
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Disc
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A fleshy, lobed, or annular nectariferous structure found within flowers; the position can be either outside or within the stamens. Preffered spelling is disc. Not to be confused with disk flower in the Asteraceae. |
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Disk flower
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An actinomorphic flower with a tubular corolla found in Asteraceae. Compare with ray flower. |
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Double calyx
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A calyx with two apparent whorls; e.g., the calyx of Amphilophium painculatum. |
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