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The members of both whorls may differ from each other in shape and color and the flowers are said to be heteroclamydeous, as for example rose (Rose sp., rosaceae). When, on the other hand, the calyx and corolla parts are indistinguishable from each other in shape and color, the flower is called homochlamydeous .
Merosity (from the greek "méros," which means "having parts") refers to the number of component parts in a distinct whorl of a plant structure. [1] The term is most commonly used in the context of a flower where it refers to the number of sepals in a whorl of the calyx, the number of petals in a whorl of the corolla, the number of stamens in a whorl of the androecium, or the number of carpels ...
Leaf whorls occur in some trees such as Brabejum stellatifolium and other species in the family Proteaceae (e.g., in the genus Banksia). In plants such as these, crowded internodes within the leaf whorls alternate with long internodes between the whorls. The morphology of most flowers (called cyclic flowers) is based on four types of whorls:
A stereotypical flower is made up of four kinds of structures arranged in whorls around the tip of a short stalk or axis, called a receptacle. [11] [2] The four main whorls (starting from the base of the flower or lowest node and working upwards) are the calyx, corolla, androecium, and gynoecium.
Whorls of the same organ are separated by "+". Organ counts within a whorl can be separated by ":", for example when part of the whorl is morphologically different. A range can be given if the number is variable, e.g. when the formula summarizes a taxon. K 3+3 – a calyx with six free sepals, arranged as two separate whorls; A∞ – many stamens
In Chinese art, the Four Gentlemen or Four Noble Ones (Chinese: 四君子; pinyin: Sì Jūnzǐ), is a collective term referring to four plants: the plum blossom, the orchid, the bamboo, and the chrysanthemum. [1] [2] The term compares the four plants to Confucian junzi, or "gentlemen".
In an epigynous flower, the stamens, petals, and sepals are attached to the hypanthium at the top of the ovary or, occasionally, the hypanthium may extend beyond the top of the ovary. Epigynous flowers are often referred to as having an inferior ovary. Plant families with epigynous flowers include orchids, asters, and evening primroses.
[4] [5] The individual flowers of a pseudanthium in the family Asteraceae (or Compositae) are commonly called florets. [6] The pseudanthium has a whorl of bracts below the flowers, forming an involucre. In all cases, a pseudanthium is superficially indistinguishable from a flower, but closer inspection of its anatomy will reveal that it is ...