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In botany, a staminode is an often rudimentary, sterile or abortive stamen, which means that it does not produce pollen. [1][page needed] Staminodes are frequently inconspicuous and stamen-like, usually occurring at the inner whorl of the flower, but are also sometimes long enough to protrude from the corolla. [citation needed] The arrow points ...
This article aims to discuss the shortcomings of the past and current approach of staminodes and proposes definitions of staminode types for use as characters in phylogenetic analyses. Staminodial structures should be classified according to their position and function in the flower.
In some taxa one or more stamens will initially form but will be nonfertile. Such a sterile stamen is termed a staminode or staminodium. Staminodes may resemble the fertile stamens and can only be identified by determining if viable pollen is released.
The staminode is a novel floral organ in Aquilegia, and many questions remain about its development and function. In most species, Aquilegia staminodes develop individually before undergoing post-genital fusion at their margins to form a sheath-like structure around the carpels.
This study presents the first morphological overview of staminodes in the Cactaceae, rendering a wider perception of the variability in patterns of floral parts in this plant group and broadening the meaning of the term staminode is discussed along with the putative origin of these appendages.
29 lis 2006 · In this survey of petal and staminode elaborations throughout the eudicots, based on both new studies and a review of the literature, the diversity of such structures and their functions is discussed. Petal elaborations are primarily present as marginal lobes and ventral lobes of various shapes.
1 mar 2001 · Previous phylogenetic and developmental studies indicate that this staminode represents a stamen that was lost phenotypically, but not genetically, and then reappeared in the tribe Cheloneae, to which Penstemon belongs.
