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Guilleminea
''Guilleminea'' is a small genus of plants in the family Amaranthaceae. They are sometimes known as matweeds. These are prostrate, mat-forming perennial herbs growing from taproots. The best known species is perhaps '' Guilleminea densa'', the small matweed, which is present on most continents and is often a weed. The other species are native to the Americas. The genus was named after the French botanist Jean Baptiste Antoine Guillemin Jean Baptiste Antoine Guillemin (20 January 1796 in Pouilly-sur-Saône – 15 January 1842 in Montpellier) was a French botanist. He studied at the municipal college in Seurre, where he was considered one of the most distinguished pupils. U .... Species The genus contains eight species including: *'' Guilleminea brittonii'' Standl., 1967 *'' Guilleminea chacoensis'' Pedersen, 2000 *'' Guilleminea densa'' (Willd.) Moq., 1849 - Small *'' Guilleminea elongata'' Mears, 1967 *'' Guilleminea fragilis'' Pedersen, 2000 *'' Guilleminea gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guilleminea Densa
''Guilleminea'' is a small genus of plants in the family Amaranthaceae Amaranthaceae is a family of flowering plants commonly known as the amaranth family, in reference to its type genus ''Amaranthus''. It includes the former goosefoot family Chenopodiaceae and contains about 165 genera and 2,040 species, making it .... They are sometimes known as matweeds. These are prostrate, mat-forming perennial herbs growing from taproots. The best known species is perhaps '' Guilleminea densa'', the small matweed, which is present on most continents and is often a weed. The other species are native to the Americas. The genus was named after the French botanist Jean Baptiste Antoine Guillemin. Species The genus contains eight species including: *'' Guilleminea brittonii'' Standl., 1967 *'' Guilleminea chacoensis'' Pedersen, 2000 *'' Guilleminea densa'' (Willd.) Moq., 1849 - Small *'' Guilleminea elongata'' Mears, 1967 *'' Guilleminea fragilis'' Pedersen, 2000 *'' Guilleminea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amaranthaceae
Amaranthaceae is a family of flowering plants commonly known as the amaranth family, in reference to its type genus ''Amaranthus''. It includes the former goosefoot family Chenopodiaceae and contains about 165 genera and 2,040 species, making it the most species-rich lineage within its parent order, Caryophyllales. Description Vegetative characters Most species in the Amaranthaceae are annual or perennial herbs or subshrubs; others are shrubs; very few species are vines or trees. Some species are succulent. Many species have stems with thickened nodes. The wood of the perennial stem has a typical "anomalous" secondary growth; only in subfamily Polycnemoideae is secondary growth normal. The leaves are simple and mostly alternate, sometimes opposite. They never possess stipules. They are flat or terete, and their shape is extremely variable, with entire or toothed margins. In some species, the leaves are reduced to minute scales. In most cases, neither basal nor terminal aggrega ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean Baptiste Antoine Guillemin
Jean Baptiste Antoine Guillemin (20 January 1796 in Pouilly-sur-Saône – 15 January 1842 in Montpellier) was a French botanist. He studied at the municipal college in Seurre, where he was considered one of the most distinguished pupils. Upon leaving school he was placed with a lawyer. He worked there for eighteen months, but his interest in chemistry and desire to obtain a commission as a military pharmacist, at a time when it was difficult to avoid conscription, caused him to abandon the study of law. In 1812, he was apprenticed to a pharmacist in Dijon. After two years in that city, he went to Geneva, where he studied with Jean Pierre Étienne Vaucher (1763–1841) and Augustin Pyramus de Candolle (1778–1841). One day, while collecting plants in the Alps, he fell and broke his right arm. The injury was slow to heal, and the accident left him with permanent stiffness in the elbow joint. In 1820 he relocated to Paris, where he became curator of the herbarium and library o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Sigismund Kunth
Carl Sigismund Kunth (18 June 1788 – 22 March 1850), also Karl Sigismund Kunth or anglicized as Charles Sigismund Kunth, was a German botanist. He is known for being one of the first to study and categorise plants from the Americas, American continents, publishing ''Nova genera et species plantarum quas in peregrinatione ad plagam aequinoctialem orbis novi collegerunt Bonpland et Humboldt'' (7 vols., Paris, 1815–1825). Born in Leipzig, Kunth became a merchant's clerk in Berlin in 1806. After meeting Alexander von Humboldt, who helped him attend lectures at the University of Berlin, Kunth became interested in botany. Kunth worked as Humboldt's assistant in Paris from 1813 to 1819. He classified plants that had been collected by Humboldt and Aimé Bonpland during their journey through the Americas. When Kunth returned to Berlin in 1820, he became Professor of Botany at the University of Berlin, as well as the Vice President of the Berlin botanical garden. In 1829, he was ele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taproot
A taproot is a large, central, and dominant root from which other roots sprout laterally. Typically a taproot is somewhat straight and very thick, is tapering in shape, and grows directly downward. In some plants, such as the carrot, the taproot is a storage organ so well developed that it has been cultivated as a vegetable. The taproot system contrasts with the adventitious or fibrous root system of plants with many branched roots, but many plants that grow a taproot during germination go on to develop branching root structures, although some that rely on the main root for storage may retain the dominant taproot for centuries, for example ''Welwitschia''.Taproot also store nutrition. Plants with taproots are often vegetables. Description Dicots, one of the two divisions of flowering plants (angiosperms), start with a taproot, which is one main root forming from the enlarging radicle of the seed. The tap root can be persistent throughout the life of the plant but is most oft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Noxious Weed
A noxious weed, harmful weed or injurious weed is a weed that has been designated by an agricultural or other governing authority as a plant that is injurious to agricultural or horticultural crops, natural habitats or ecosystems, or humans or livestock. Most noxious weeds have been introduced into an ecosystem by ignorance, mismanagement, or accident. Some noxious weeds are native. Typically they are plants that grow aggressively, multiply quickly without natural controls (native herbivores, soil chemistry, etc.), and display adverse effects through contact or ingestion. Noxious weeds are a large problem in many parts of the world, greatly affecting areas of agriculture, forest management, nature reserves, parks and other open space. Many noxious weeds have come to new regions and countries through contaminated shipments of feed and crop seeds or were intentionally introduced as ornamental plants for horticultural use. Some "noxious weeds", such as ragwort, produce copious amou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
