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A perfect flower has both stamens and carpels, and is described as "bisexual" or "hermaphroditic". A unisexual flower is one in which either the stamens or the carpels are missing, vestigial or otherwise non-functional. Each flower is either staminate (having only functional stamens and thus male), or carpellate or pistillate (having only ...
Stamen. Stamens of a Hippeastrum with white filaments and prominent anthers carrying pollen. The stamen ( pl.: stamina or stamens) is the pollen-producing reproductive organ of a flower. Collectively, the stamens form the androecium. [ 1]
Floral morphology. Diagram of flower parts. In botany, floral morphology is the study of the diversity of forms and structures presented by the flower, which, by definition, is a branch of limited growth that bears the modified leaves responsible for reproduction and protection of the gametes, called floral pieces. [ note 1] Fertile leaves or ...
The ABC model of flower development is a scientific model of the process by which flowering plants produce a pattern of gene expression in meristems that leads to the appearance of an organ oriented towards sexual reproduction, a flower. There are three physiological developments that must occur in order for this to take place: firstly, the ...
Other flowers have modified petal-like stamens; the double flowers of peonies and roses are mostly petaloid stamens. [18] Many flowers have symmetry. When the perianth is bisected through the central axis from any point and symmetrical halves are produced, the flower is said to be actinomorphic or regular. This is an example of radial symmetry.
Dioecy (/ d aɪ ˈ iː s i / dy-EE-see; [1] from Ancient Greek διοικία dioikía 'two households'; adj. dioecious, / d aɪ ˈ iː ʃ (i) ə s / dy-EE-sh(ee-)əs [2] [3]) is a characteristic of certain species that have distinct unisexual individuals, each producing either male or female gametes, either directly (in animals) or indirectly (in seed plants).
A floral formula is a notation for representing the structure of particular types of flowers. Such notations use numbers, letters and various symbols to convey significant information in a compact form. They may represent the floral form of a particular species, or may be generalized to characterize higher taxa, usually giving ranges of numbers ...
A floral diagram is a schematic cross-section through a young flower. [ 1] It may be also defined as “projection of the flower perpendicular to its axis”. [ 3] It usually shows the number of floral parts, [ Note 2] their sizes, relative positions and fusion. Different organs are represented by distinguishable symbols, which may be uniform ...
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