staminode


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Related to staminode: epipetalous

staminode

a rudimentary, infertile stamen that may be reduced in size.
References in periodicals archive ?
In Musaceae (Andersson, 1998b), Strelitziaceae (Andersson, 1998c), Heliconiaceae (Andersson, 1998a), and Lowiaceae (Larsen, 1998b) the median posterior stamen is reduced to a staminode or is missing, and the flowers are more or less conspicuously bilabiate.
In all four ginger families, the petaloid staminode structures produce the bulk of the floral display (color, symmetry and pattern).
5 x 6-7 of staminode (long x wide) (*) Ovary 6 x 3, densely lepidote 6-7.
The identification and description of a staminode often remains vague and arbitrary, and may overlap a whole range of different structures: It is an abstraction of something that is neither a stamen (except for those cases with clearly abortive anthers), nor a petal proper, nor any other clearly distinguishable organ.
Since the size and shape of the flower is adapted to the wasp's head, wasps would seem to be the most efficient pollinators; the staminode may act in forcing the insect's head downward so that its chin brushes anthers or stigma (DeVos, 1983).
caroliniana, the staminodes attract insects by appearing filled with abundant pollen (Kaul & Kaul, 2012).
5 mm wide; staminodes (5)6, anthers <1 mm long, sterile, filaments 1 mm long, free, inserted on edge of annular, papillose disk; ovary superior, 3-celled, style short, stigma 3-lobed, tiny; fruits subglobose, 3-angles, glabrous; exocarp 3-valved; pyrene one per fruit, covered all by a yellow-reddish pseudoaril; seeds one per fruit, rounded, 5-6 mm diameter, hilum with an irregular depression.
Inflorescences axillary or terminal, racemose, 2-33 flowered; bracts persistent or deciduous; bracteoles absent; flowers zygomorphic or asymmetric; Sepals 5, two smaller and three larger; petals 5, yellow or orange base; stamens 7, heteromorphic, 4 smaller median, subsessile, fillet erect, 2-3 abaxial larger, 2 laterals, fillets curved, twice the length of the anthers, 1 central, fillet erect, less than anther, 3-4 adaxial staminodes, anthers dehiscent through apical sutures.
possess tricarpellary apocarpous pistil consisting of three independent carpels, while rudimentary androecium is represented by two whorls of three staminodes each alternately arranged in antepetalous and antesepalous position (DeMason et al.
2 mm in diameter, glabrous, stigma branches three, white, linear, 1-2 mm long, recurved; staminodes white, laminar, triangular, ca.
8 cm in diameter, often with abortive carpels visible and more or less developed, exocarp nearly smooth when fresh, red at maturity, dotted with lenticels, perianth with triangular petals, staminodes triangular, obtuse at apex, to 2 mm long, sometimes with abortive anther.