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Sphenoclea Zeylanica
''Sphenoclea zeylanica'', called chickenspike, gooseweed, and wedgewort, is a widespread species of flowering plant in the genus '' Sphenoclea'', native to Africa, Madagascar, tropical and subtropical Asia, and Australia. It is widely introduced in the New World tropics and subtopics from the southern United States to northern Argentina. Its young leaves are edible and are occasionally eaten, perhaps with a light boiling. A common weed of rice paddies, it can cause yield losses from 25 to 50%. References Solanales Plants described in 1788 {{Solanales-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaertn
Joseph Gaertner (12 March 1732 – 14 July 1791) was a German botanist, best known for his work on seeds, ''De Fructibus et Seminibus Plantarum'' (1788-1792). Biography He was born in Calw, and studied in Göttingen under Albrecht von Haller. He was primarily a naturalist, but also worked at physics and zoology. He travelled extensively to visit other naturalists. He was professor of anatomy in Tübingen in 1760, and was appointed professor of botany at St Petersburg in 1768, but returned to Calw in 1770. Gaertner made back cross to convert one species into another. Back cross increases nuclear gene frequency His observations were: 1. Dominance of traits 2. Equal contribution of male and female to the progeny 3. No variation in F1 (first generation of descendants) 4. Large variation in F2 (second generation of descendants) including parental and intermediate types 5. Some of F2 plants had entirely new traits but he was unable to give possible explanation for observe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphenoclea
''Sphenoclea'' is a genus of succulent erect annual herbs. They occur in damp habitats throughout the tropics. There are two species, '' S. zeylanica'' and '' S. pongatium''. The genus is placed alone in family Sphenocleaceae. The position of the family is somewhat uncertain; it is now usually placed in Solanales, but it has previously been placed in Asterales, especially near Campanulaceae The family Campanulaceae (also bellflower family), of the order Asterales, contains nearly 2400 species in 84 genera of herbaceous plants, shrubs, and rarely small trees, often with milky sap. Among them are several familiar garden plants belon ..., and there is some evidence to support this. References External links * http://www.mobot.org/MOBOT/Research/APweb/orders/solanalesweb.htm#Sphenocleaceae * http://delta-intkey.com/angio/www/sphenocl.htm Solanales genera Solanales {{Solanales-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solanales
The Solanales are an order of flowering plants, included in the asterid group of dicotyledons. Some older sources used the name Polemoniales for this order. Taxonomy Under the older Cronquist system, the latter three families were placed elsewhere, and a number of others were included: * Family Duckeodendraceae (now treated as a synonym of Solanaceae) * Family Nolanaceae (now treated as a synonym of Solanaceae) * Family Cuscutaceae (now treated as a synonym of Convolvulaceae) * Family Retziaceae (now treated as a synonym of Stilbaceae, order Lamiales) * Family Menyanthaceae (now placed in order Asterales) * Family Polemoniaceae (now placed in order Ericales) * Family Hydrophyllaceae (now treated as a synonym of Boraginaceae) In the classification system of Dahlgren the Solanales were in the superorder Solaniflorae (also called Solananae). The following families are included here in newer systems such as that of the Angiosperm Phylogeny Group (APG): * Family Solanaceae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
