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Sigesbeckia Blakei
''Sigesbeckia'' is a genus of annual plants in the family Asteraceae, with a pantropical distribution and in some areas of Asia and South America also into temperate regions. St Paul's-wort or St. Paul's wort is a common name for some of the species. ''Sigesbeckia'' is widely distributed and has been traditionally used for the management of chronic diseases, including arthritis. Origin ''Sigesbeckia'' is named after the German botanist Johann Georg Siegesbeck (:de:Johann Georg Siegesbeck, de), who was a strong critic of Carl Linnaeus's botanical classification system. Siegesbeck had referred to it as "loathsome harlotry" because of the focus of the system upon the presence (or absence) of sex organs in plants, and their locations and groupings. Siegesbeck tried to refute Linnaeus' sexual classification system, but was unable to provide sound scholastic arguments to support his arguments. Linnaeus proposed in ''Critica Botanica'' that there should be a link between the plant and t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annual Plant
An annual plant is a plant that completes its life cycle, from germination to the production of seeds, within one growing season, and then dies. Globally, 6% of all plant species and 15% of herbaceous plants (excluding trees and shrubs) are annuals. The annual life cycle has independently emerged in over 120 different plant families throughout the entire angiosperm phylogeny. The evolutionary and ecological drivers of the annual life cycle Traditionally, there has been a prevailing assumption that annuals have evolved from perennial ancestors. However, recent research challenges this notion, revealing instances where perennials have evolved from annual ancestors. Intriguingly, models propose that transition rates from an annual to a perennial life cycle are twice as fast as the reverse transition. The life-history theory posits that annual plants are favored when adult mortality is higher than seedling (or seed) mortality, i.e., annuals will dominate environments with dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |