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Heterostyly is a unique form of polymorphism and herkogamy in flowers. In a heterostylous species, two or three morphological types of flowers, termed "morphs", exist in the population. On each individual plant, all flowers share the same morph. The flower morphs differ in the lengths of the pistil and stamens, and
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Many flowers, for example, attract only one specific species of insect and therefore rely on that insect for successful reproduction. This close relationship is an example of coevolution, as the flower and pollinator have developed together over a long period to match each other's needs.
For example, a double raceme is a raceme in which the single flowers are replaced by other simple racemes; the same structure can be repeated to form triple or more complex structures. Compound raceme inflorescences can either end with a final raceme (homoeothetic), or not (heterothetic). A compound raceme is often called a panicle.
However, in the whorled flowers, because there are repetitions of floral parts, there may be one or more planes of symmetry, so they can have bilateral symmetry (i.e., a single plane of symmetry) or radial symmetry (i.e., several planes can divide the flower in as many mirror images). Thus, two types of flowers can be distinguished by their ...
The native flora of the United States includes about 17,000 species of vascular plants, plus tens of thousands of additional species of other plants and plant-like organisms such as algae, lichens and other fungi, and mosses.
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Nicandra physalodes is a species of flowering plant in subfamily Solanoideae of the nightshade family.It is known by the common names apple-of-Peru [2] and shoo-fly plant.It is thought originally to have been native to western South America, including Peru, and is known elsewhere as an introduced and ruderal species – sometimes as a weed – in tropical, subtropical and, to a lesser extent ...