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Limnanthaceae
The Limnanthaceae are a small family of annual herbs occurring throughout temperate North America. There are eight species and nineteen taxa currently recognized. Members of this family are prominent in vernal pool communities of California. Some taxa have been domesticated for use as an oil seed crop. Some members are listed as threatened or endangered and have been the focus of disputes over development plans (e.g. ''Limnanthes floccosa'' subsp. ''californica'', ''Limnanthes vinculans'' ) The Limnanthaceae are members of a recently identified clade (Brassicales) of mustard oil producing plants. They have a sharp flavor similar to mustard greens, radish or capers. (2003): An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG II. ''Botanical Journal of the Linnean Society'' 141(4): 399-436.PDF fulltext/ref> Two genera are recognized in the family. The monotypic genus ''Floerkea'' inhabits shaded, vernally wet habitats in e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limnanthaceae
The Limnanthaceae are a small family of annual herbs occurring throughout temperate North America. There are eight species and nineteen taxa currently recognized. Members of this family are prominent in vernal pool communities of California. Some taxa have been domesticated for use as an oil seed crop. Some members are listed as threatened or endangered and have been the focus of disputes over development plans (e.g. ''Limnanthes floccosa'' subsp. ''californica'', ''Limnanthes vinculans'' ) The Limnanthaceae are members of a recently identified clade (Brassicales) of mustard oil producing plants. They have a sharp flavor similar to mustard greens, radish or capers. (2003): An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG II. ''Botanical Journal of the Linnean Society'' 141(4): 399-436.PDF fulltext/ref> Two genera are recognized in the family. The monotypic genus ''Floerkea'' inhabits shaded, vernally wet habitats in e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limnanthes Douglasii
''Limnanthes douglasii'' is a species of annual flowering plant in the family Limnanthaceae (meadowfoam) commonly known as Douglas' meadowfoam or poached egg plant. It is native to California and Oregon, where it grows in wet, grassy habitat, such as vernal pools and spring meadows. It can grow in poorly drained clay soils. The plant was collected by the Scottish explorer and botanist David Douglas, who worked on the west coast of America in the 1820s. The plant usually bears white flowers with yellow centers, hence the name "poached egg plant", but flower color can vary across subspecies. It is a popular ornamental plant. It attracts hoverflies and is pollinated by bees. It is self-seeding, even in a lawn. This plant has gained the Royal Horticultural Society's Award of Garden Merit. There are six subspecies: *''L. douglasii'' subsp. ''douglasii'' R. Br., is native to the coastal mountains and valleys of southwestern Oregon south to the San Francisco Bay Area The San Fra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limnanthes
''Limnanthes'', the type genus of the family Limnanthaceae, consists of annual herbaceous plants commonly known as the meadowfoams. The seven species are all native to coastal and adjoining regions (inland valleys, foothills and mountains) of western North America, where they typically grow in marshy habitats, such as the margins of vernal pools. Some are endemic to California. General form ranges from decumbent to erect, with leaves either pinnately lobed or compound; the lobes or leaflets may themselves range from entire to deeply lobed. Both 4- and 5-sepaled and petaled members are known. The white meadowfoam ''Limnanthes alba'' is of commercial interest for its oil, while several other species are rare or endangered. Honey produced by bees that pollinate ''Limnanthes alba'' has the distinct flavor of toasted marshmallows. ''L. douglasii'' is widely cultivated as a hardy annual, its white and yellow flower colour giving it the common name of poached egg plant. Species The ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floerkea
''Floerkea'' is a monotypic genus of plants in the meadowfoam family containing the sole species ''Floerkea proserpinacoides'', which is known by the common names false mermaid, false mermaidweed, and floerkea. This tiny wildflower is native to many parts of North America, where it is found in moist areas such as shady forests. It is a fleshy, annual herb which grows short stems which may lie flat on the ground, tangle into a clump, or grow somewhat erect. The foliage is hairless and shiny. The leaves are divided into many oval-shaped, pointed leaflets up to long. The flower is a cup of pointed green sepals containing three tiny white spoon-shaped petals and a bunch of stamens with yellow anthers. Growing in the center of the flower are the two to three fruits, which are bumpy, spherical nutlets. The logo for the Flora of North America is a ''Floerkea'' flower. The genus was named in honor of the German botanist, Heinrich Gustav Flörke Heinrich Gustav Flörke (24 December 176 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Brown (Scottish Botanist From Montrose)
Robert Brown (21 December 1773 – 10 June 1858) was a Scottish botanist and paleobotanist who made important contributions to botany largely through his pioneering use of the microscope. His contributions include one of the earliest detailed descriptions of the cell nucleus and cytoplasmic streaming; the observation of Brownian motion; early work on plant pollination and fertilisation, including being the first to recognise the fundamental difference between gymnosperms and angiosperms; and some of the earliest studies in palynology. He also made numerous contributions to plant taxonomy, notably erecting a number of plant families that are still accepted today; and numerous Australian plant genera and species, the fruit of his exploration of that continent with Matthew Flinders. Early life Robert Brown was born in Montrose, Angus, Montrose on 21 December 1773, in a house that existed on the site where Montrose Library currently stands. He was the son of James Brown (Scottis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Angiosperm Phylogeny Group
The Angiosperm Phylogeny Group (APG) is an informal international group of systematic botanists who collaborate to establish a consensus on the taxonomy of flowering plants (angiosperms) that reflects new knowledge about plant relationships discovered through phylogenetic studies. , four incremental versions of a classification system have resulted from this collaboration, published in 1998, 2003, 2009 and 2016. An important motivation for the group was what they considered deficiencies in prior angiosperm classifications since they were not based on monophyletic groups (i.e., groups that include all the descendants of a common ancestor). APG publications are increasingly influential, with a number of major herbaria changing the arrangement of their collections to match the latest APG system. Angiosperm classification and the APG In the past, classification systems were typically produced by an individual botanist or by a small group. The result was a large number of systems ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Central Valley
The Central Valley is a broad, elongated, flat valley that dominates the interior of California. It is wide and runs approximately from north-northwest to south-southeast, inland from and parallel to the Pacific Ocean, Pacific Coastal California, coast of the state. It covers approximately , about 11% of California's land area. The valley is bounded by the California Coast Ranges, Coast Ranges to the west and the Sierra Nevada to the east. The Central Valley is a list of regions of California, region known for its agricultural productivity: it provides more than half of the fruits, vegetables, and nuts grown in the United States. More than of the valley are irrigated via reservoirs and canals. The valley hosts many cities, including the state capital Sacramento, California, Sacramento; as well as Redding, California, Redding, Chico, California, Chico, Stockton, California, Stockton, Modesto, California, Modesto, Merced, California, Merced, Fresno, California, Fresno, Visalia, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gilgai
A gilgai is a small, ephemeral lake formed from a depression in the soil surface in expanding clay soils. Additionally, the term "gilgai" is used to refer to the overall micro-relief in such areas, consisting of mounds and depressions, not just the lakes themselves. The name comes from an Australian Aboriginal word meaning small water hole. These pools are commonly a few metres across and less than deep, however in some instances they may be several metres deep and up to across. Gilgais are found worldwide wherever cracking clay soils and pronounced wet and dry seasons are present. Gilgais are also called "melonholes, crabholes, hogwallows or puff and shelf formations". Gilgais are thought to form in vertisols through repeated cycles of swelling of the clay when wet and subsequent shrinkage upon drying. This action, known as argillipedoturbation, causes the soil to crack when dry and loose soil material then fills these cracks. When the soil swells upon subsequent re-wetting t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coast Ranges
The Pacific Coast Ranges (officially gazetted as the Pacific Mountain System in the United States) are the series of mountain ranges that stretch along the West Coast of North America from Alaska south to Northern and Central Mexico. Although they are commonly thought to be the westernmost mountain range of the continental United States and Canada, the geologically distinct Insular Mountains of Vancouver Island lie further west. The Pacific Coast Ranges are part of the North American Cordillera (sometimes known as the Western Cordillera, or in Canada, as the Pacific Cordillera and/or the Canadian Cordillera), which includes the Rocky Mountains, the Columbia Mountains, the Interior Mountains, the Interior Plateau, the Sierra Nevada, the Great Basin mountain ranges, and other ranges and various plateaus and basins. The Pacific Coast Ranges designation, however, only applies to the Western System of the Western Cordillera,S. Holland, ''Landforms of British Columbia'', BC Govt. 197 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peninsular Ranges
The Peninsular Ranges (also called the Lower California province) are a group of mountain ranges that stretch from Southern California to the southern tip of the Baja California peninsula; they are part of the North American Coast Ranges, which run along the Pacific Coast from Alaska to Mexico. Elevations range from . Geography The Peninsular Ranges include the Santa Ana Mountains, Temescal and other mountains and ranges of the Perris Block, San Jacinto and Laguna ranges of southern California continuing from north to south with the Sierra de Juárez, Sierra de San Pedro Mártir, Sierra de San Borja, Sierra de San Francisco, Sierra de la Giganta, and Sierra de la Laguna in Baja California. Palomar Mountain, home to Palomar Observatory, is in the Peninsular Ranges in San Diego County, as are Viejas Mountain and the San Ysidro Mountains. The Peninsular ranges run predominantly north-south, unlike the Transverse Ranges to their north, which mostly run east-west. Geology Rock ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Umpqua River
The Umpqua River ( ) on the Pacific coast of Oregon in the United States is approximately long. One of the principal rivers of the Oregon Coast and known for bass and shad, the river drains an expansive network of valleys in the mountains west of the Cascade Range and south of the Willamette Valley, from which it is separated by the Calapooya Mountains. From its source northeast of Roseburg, the Umpqua flows northwest through the Oregon Coast Range and empties into the Pacific at Winchester Bay. The river and its tributaries flow almost entirely within Douglas County, which encompasses most of the watershed of the river from the Cascades to the coast. The "Hundred Valleys of the Umpqua" form the heart of the timber industry of southern Oregon, generally centered on Roseburg. The Native Americans in the Umpqua's watershed consist of several tribes, such as the Lower and Upper Umpqua (for which the river is named), and the Kalapuya. These tribes witnessed much of the Great Flo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetraspore
Tetraspores are red algae spores produced by the tetrasporophytic (diploid) phase in the life history of algae in the Rhodophyta as a result of meiosis.Jones, W.E. Revised and reprinted 1964. A Key to the genera of the British seaweeds.''Field Studies''. Vol 1 (4) pp.1 - 32 The name is derived from the 4 spores that form after this meiosis, the division is of three kinds: cruciate, zonate and tetrahedral In geometry, a tetrahedron (plural: tetrahedra or tetrahedrons), also known as a triangular pyramid, is a polyhedron composed of four triangular faces, six straight edges, and four vertex corners. The tetrahedron is the simplest of all the o .... References Red algae Reproduction {{rhodophyta-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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