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Discaria
''Discaria'' is a genus of 6 species of flowering plants in the family Rhamnaceae, native to temperate regions of the Southern Hemisphere, in Australia, New Zealand and South America. They are deciduous thorny shrubs or small trees growing to 2–5 m tall. They are also non-legume nitrogen fixers. Many of the world's ''Discaria'' species qualify as xerophytes in the true sense of the term, and the Australian species are no exception. They frequently occur on porous or well-drained sites and on soils of low fertility. Some species can fix nitrogen from the atmosphere with the help of symbiotic bacteria (''Frankia ''Frankia'' is a genus of nitrogen-fixing bacteria that live in symbiosis with actinorhizal plants, similar to the ''Rhizobium'' bacteria found in the root nodules of legumes in the family Fabaceae. ''Frankia'' also initiate the forming of root ...'') that form nodules in their roots. Taxonomy Species ''Discaria'' comprises the following species: * '' Discaria am ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discaria Chacaye
''Discaria'' is a genus of 6 species of flowering plants in the family Rhamnaceae, native to temperate regions of the Southern Hemisphere, in Australia, New Zealand and South America. They are deciduous thorny shrubs or small trees growing to 2–5 m tall. They are also non-legume nitrogen fixers. Many of the world's ''Discaria'' species qualify as xerophytes in the true sense of the term, and the Australian species are no exception. They frequently occur on porous or well-drained sites and on soils of low fertility. Some species can fix nitrogen from the atmosphere with the help of symbiotic bacteria (''Frankia ''Frankia'' is a genus of nitrogen-fixing bacteria that live in symbiosis with actinorhizal plants, similar to the ''Rhizobium'' bacteria found in the root nodules of legumes in the family Fabaceae. ''Frankia'' also initiate the forming of root ...'') that form nodules in their roots. Taxonomy Species ''Discaria'' comprises the following species: * '' Discaria am ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discaria
''Discaria'' is a genus of 6 species of flowering plants in the family Rhamnaceae, native to temperate regions of the Southern Hemisphere, in Australia, New Zealand and South America. They are deciduous thorny shrubs or small trees growing to 2–5 m tall. They are also non-legume nitrogen fixers. Many of the world's ''Discaria'' species qualify as xerophytes in the true sense of the term, and the Australian species are no exception. They frequently occur on porous or well-drained sites and on soils of low fertility. Some species can fix nitrogen from the atmosphere with the help of symbiotic bacteria (''Frankia ''Frankia'' is a genus of nitrogen-fixing bacteria that live in symbiosis with actinorhizal plants, similar to the ''Rhizobium'' bacteria found in the root nodules of legumes in the family Fabaceae. ''Frankia'' also initiate the forming of root ...'') that form nodules in their roots. Taxonomy Species ''Discaria'' comprises the following species: * '' Discaria am ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discaria pubescens
''Discaria pubescens'', the hairy anchor plant or Australian anchor plant, is a species of flowering plant in the family Rhamnaceae. It is native to Tasmania, Victoria, New South Wales and Queensland in Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma .... References pubescens Flora of New South Wales Flora of Queensland Flora of Tasmania Flora of Victoria (Australia) Rosales of Australia Rare flora of Australia Taxa named by Adolphe-Théodore Brongniart Taxa named by George Claridge Druce {{Australia-rosid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discaria toumatou
''Discaria toumatou'', commonly called matagouri, tūmatakuru or wild Irishman, is a tangle-branched thorny plant endemic to New Zealand. Matagouri is a tangle-branched, extremely thorny, divaricating shrub or small tree up to five metres tall. It has small leathery leaves close to the thorns, which are only abundant in spring or the shade. The flowers are tiny and white with no petals. It is the only New Zealand native plant that has thorns. It is most common in tussock grassland, stony areas and river beds. It is common in the eastern South Island, and found in a few coastal localities in the North Island south from the mouth of the Waikato River. As with other ''Discaria'' species it fixes nitrogen from the atmosphere with the help of symbiotic bacteria of the genus ''Frankia'' in its roots. It often grows in association with mingimingi (''Coprosma propinqua''), porcupine shrub (''Melicytus alpinus'', an alpine mahoe), native brooms (''Carmichaelia'' species) and the int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Actinorhizal Plant
Actinorhizal plants are a group of angiosperms characterized by their ability to form a symbiosis with the nitrogen fixing actinomycetota ''Frankia''. This association leads to the formation of nitrogen-fixing root nodules. Classification Actinorhizal plants are dicotyledons distributed among three angiosperm orders, 8 families and 25 genera: These three orders form a single clade within the Rosids, which is a sister taxon to the other major nitrogen-fixing order, the Fabales. All actinorhizal species are trees or shrubs, except for the genus ''Datisca''. Many are common plants in temperate regions like alder, bayberry, sweetfern, Avens, mountain misery and ''Coriaria''. Some ''Elaeagnus'' species and Sea-buckthorns produce edible fruit. In tropical regions, ''Casuarinas'' are widely cultivated. Distribution and ecology Actinorhizal plants are found on all continents except for Antarctica. Their ability to form nitrogen-fixing nodules confers a selective advantage in poor soils ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhamnaceae
The Rhamnaceae are a large family of flowering plants, mostly trees, shrubs, and some vines, commonly called the buckthorn family. Rhamnaceae is included in the order Rosales. The family contains about 55 genera and 950 species. The Rhamnaceae have a worldwide distribution, but are more common in the subtropical and tropical regions. The earliest fossil evidence of Rhamnaceae is from the Late Cretaceous. Fossil flowers have been collected from the Upper Cretaceous of Mexico and the Paleocene of Argentina. Leaves of family Rhamnaceae members are simple, i.e., the leaf blades are not divided into smaller leaflets.Flowering Plants of the Santa Monica Mountains, Nancy Dale, 2nd Ed. 2000, p. 166 Leaves can be either alternate or opposite. Stipules are present. These leaves are modified into spines in many genera, in some (e.g. ''Paliurus spina-christi'' and '' Colletia cruciata'') spectacularly so. ''Colletia'' stands out by having two axillary buds instead of one, one developing int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frankia
''Frankia'' is a genus of nitrogen-fixing bacteria that live in symbiosis with actinorhizal plants, similar to the ''Rhizobium'' bacteria found in the root nodules of legumes in the family Fabaceae. ''Frankia'' also initiate the forming of root nodules. This genus was originally named by Jørgen Brunchorst, in 1886 to honor the German biologist Albert Bernhard Frank. Brunchorst considered the organism he had identified to be a filamentous fungus. redefined the genus in 1970 as containing prokaryotic actinomycetes and created the family Frankiaceae within the Actinomycetales. He retained the original name of ''Frankia'' for the genus. Overview Most ''Frankia'' strains are specific to different plant species. The bacteria are filamentous and convert atmospheric nitrogen into ammonia via the enzyme nitrogenase, a process known as nitrogen fixation. They do this while living in root nodules on actinorhizal plants. The bacteria can supply most or all of the nitrogen requirement ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flowering Plant
Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. The term "angiosperm" is derived from the Greek words ('container, vessel') and ('seed'), and refers to those plants that produce their seeds enclosed within a fruit. They are by far the most diverse group of land plants with 64 orders, 416 families, approximately 13,000 known genera and 300,000 known species. Angiosperms were formerly called Magnoliophyta (). Like gymnosperms, angiosperms are seed-producing plants. They are distinguished from gymnosperms by characteristics including flowers, endosperm within their seeds, and the production of fruits that contain the seeds. The ancestors of flowering plants diverged from the common ancestor of all living gymnosperms before the end of the Carboniferous, over 300 million years ago. The closest fossil relatives of flowering plants are uncertain and contentious. The earliest angiosperm fossils ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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