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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 ...
the interpretation of staminode evolution. To examine the evolutionary history of staminodes, we determined an-droecial characters (number of stamen whorls, presence/absence of stami-nodes), floral design (symmetry, blossom type), primary pollen vector, and proposed staminode functionality (if found) for families considered by Chase
1 sie 2024 · A fascinating component of floral morphological diversity is the evolution of novel floral organ identities. Perhaps the best-understood example of this is the evolutionary sterilization of stamens to yield staminodes, which have evolved independently numerous times across angiosperms and display a considerable range of morphologies.
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.
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.
1 paź 2000 · Staminode origin. Ancestrally, monocot flowers produce two whorls of fertile stamens, although reduction of an entire stamen whorl occurs in 37.8% of monocot families pollinated by generalist insects or wind.
Stamens initiate as primordia from the flower apical meristem, but at maturity are attached to the receptacle, corolla (having an epipetalous stamen fusion; see below), hypanthium rim, or staminal disk, a fleshy, elevated, often nectariferous cushion of tissue.
