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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 ...
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.
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.
1 paź 2000 · With the loss of their defining function as producers of viable male gametophytes, stamens become staminodes. Staminodes are relatively uncommon, but widely distributed taxonomically, occurring in at least one species in 32.5% of angiosperm families and 54.4% of angiosperm genera.
…a petal-like blade called a staminode (in the same manner that a sepal forms a petal-like blade in some flowers without true petals). The apparent petals in some angiosperm families, such as are found in many members of the pink family (Caryophyllaceae), are staminodial in origin.
Stamens that have lost their primary function of pollen production, or staminodes, occur uncommonly within angiosperms, but frequently fulfill important secondary floral functions. The phylogenetic distribution of staminodes suggests that they typically arise during evolutionary reduction of the androecium.
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.
