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Leavenworthia
''Leavenworthia'' is a genus of flowering plants in the family Brassicaceae. It includes about eight species native to the southern and southeastern United States.''Leavenworthia''. Flora of North America. They are known generally as gladecresses.''Leavenworthia''. USDA PLANTS.''Leavenworthia''. Integrated Taxonomic Information System (ITIS). Description [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leavenworthia
''Leavenworthia'' is a genus of flowering plants in the family Brassicaceae. It includes about eight species native to the southern and southeastern United States.''Leavenworthia''. Flora of North America. They are known generally as gladecresses.''Leavenworthia''. USDA PLANTS.''Leavenworthia''. Integrated Taxonomic Information System (ITIS). Description [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leavenworthia Texana
''Leavenworthia'' is a genus of flowering plants in the family Brassicaceae. It includes about eight species native to the southern and southeastern United States.''Leavenworthia''. Flora of North America. They are known generally as gladecresses.''Leavenworthia''. USDA PLANTS.''Leavenworthia''. Integrated Taxonomic Information System (ITIS). Description [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leavenworthia Aurea
''Leavenworthia'' is a genus of flowering plants in the family Brassicaceae. It includes about eight species native to the southern and southeastern United States.''Leavenworthia''. Flora of North America. They are known generally as gladecresses.''Leavenworthia''. USDA PLANTS.''Leavenworthia''. Integrated Taxonomic Information System (ITIS). Description [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leavenworthia Crassa
''Leavenworthia crassa'' is a species of flowering plant in the mustard family, Brassicaceae, known commonly as the fleshy-fruit gladecress. It is endemic to Alabama in the United States, where it occurs in only two counties. It is "likely one of the most imperiled plant species in the Southeast,"''Leavenworthia crassa''. NatureServe 2013. and the issued a final rule listing it as an in 2014.USFWS [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leavenworthia Alabamica
''Leavenworthia alabamica'' is a species of flowering plant in the family Brassicaceae. It is commonly known as Alabama gladecress. It is endemic to Alabama. Description ''Leavenworthia ''Leavenworthia'' is a genus of flowering plants in the family Brassicaceae. It includes about eight species native to the southern and southeastern United States. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leavenworthia Exigua
''Leavenworthia exigua'', also known as the Tennessee gladecress, is a member of the mustard family. Tennessee gladecress is an annual plant that is native to southern United States. It is a fruit-bearing plant, with squarish leaves that fall off one the fruit is present and ripened. Tennessee gladecress is a beautiful plant during its blooming season, as it produces a light-lilac colored, small flower. Description ''Leavenworthia exigua'' is a member of the Leavenworthia genus along with seven other species. Members of the Leavenworthia genus are often indigenous to southern states, including Kentucky and Tennessee. With seeds that germinate in the fall, ''L.exigua'' are annual winter and spring plants; to find a ''L.exigua'', it may be helpful to look for areas of limestone clades where the soil is damp for the winter and spring seasons. There are three different variations of ''L.exigua'' found in four southern states: Alabama, Tennessee, Kentucky, and Georgia. Due to its r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leavenworthia Uniflora
''Leavenworthia uniflora'', called Michaux's gladecress or one-flowered gladecress, is a plant species native to the southeastern and Midwestern parts of the United States. It is reported from northwestern Georgia, northern Alabama, Tennessee, northern Arkansas, southern Missouri, Kentucky, southeastern Indiana and southwestern Ohio. It grows in open, sun-lit locations at elevations less than 500 meters (1700 feet). ''Leavenworthia uniflora'' is an herb up to 20 cm (8 inches) tall. Basal leaves are up to 13 cm (5.2 inches) long, pinnately Pinnation (also called pennation) is the arrangement of feather-like or multi-divided features arising from both sides of a common axis. Pinnation occurs in biological morphology, in crystals, such as some forms of ice or metal crystals, and in ... lobed with 3-10 pairs of lobes. Flowers are solitary, white, up to 6 mm across. Fruits are narrowly oblong, up to 3 cm (1.2 inches) long. References External linksphoto of h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leavenworthia Stylosa
''Leavenworthia stylosa'' is a species of flowering plant in the family Brassicaceae known by the common names cedar gladecress or long-styled gladecress. It is found only in the Central Basin of Tennessee, where it grows in cedar glades, ditches, and low-lying fields. ''Leavenworthia stylosa'' typically blooms from March to May. The flowers are about 1 inch wide and are white or yellow in color with a yellow center. The tips of the petals are notched. Yellow varieties are found more commonly north of Nashville, while white varieties are found more commonly south. Habitat As the common name suggests, ''Leavenworthia stylosa'' grows only in cedar glades and adjacent habitat. Cedar glades are sites in the central eastern United States where limestone lies on the surface resulting in an unusual ecosystem. Along with Eastern red cedar ''Juniperus virginiana'', also known as red cedar, eastern red cedar, Virginian juniper, eastern juniper, red juniper, and other local names, is a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leavenworthia Torulosa
''Leavenworthia torulosa'', the necklace gladecress, is a species of plant in the mustard family. It is native to the eastern United States where it is only found near limestone cedar glades of Alabama, Georgia, Kentucky, and Tennessee. It is considered rare in all states it is found except Tennessee, where it is common in the Nashville Basin due to the abundance of available habitat. It is found in more wet-mesic areas than typical ''Leavenworthia'' of the region, often growing in standing water. It is a winter annual An annual plant is a plant that completes its biological life cycle, life cycle, from germination to the production of seeds, within one growing season, and then dies. The length of growing seasons and period in which they take place vary accor ..., which makes it well adapted for the extreme wet and dry seasons of the cedar glades. It produces a relatively large yellow and white flower in early spring and dies with the arrival of summer. The constricted matur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cedar Glade
A calcareous glade is a type of ecological community that is found in the central Eastern United States. Calcareous glades occur where bedrock such as limestone occurs near or at the surface, and have very shallow and little soil development. Due to the shallow soil and the extreme conditions created by it, trees are often unable to grow in the glades. This creates a habitat that is usually sunny, dry, and hot. Calcareous glade vegetation is more similar to that of a desert habitat than a grassland, being dominated by small spring annuals with occasional geophytic or succulent perennials. The usage of the words "glades" and "barrens" to describe dry, rocky communities in the United States is not uniform, and the terms are often used interchangeably. Calcareous glade communities can intergrade with dry rocky prairies, particularly in sloping habitats. Due to their unsuitability for agriculture, glade communities have survived to the present day at a higher rate than deeper-soil pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stamen
The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filament and an anther which contains ''sporangium, microsporangia''. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle area of the anther. The sterile tissue between the lobes is called the connective, an extension of the filament containing conducting strands. It can be seen as an extension on the dorsal side of the anther. A pollen grain develops from a microspore in the microsporangium and contains the male gametophyte. The stamens in a flower are collectively called the androecium. The androecium can consist of as few as one-half stamen (i.e. a single locule) as in ''Canna (plant), Canna'' species or as many as 3,482 stamens which have been counted in the saguaro (''Carnegiea gigantea'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Evolution
Evolution is change in the heritable characteristics of biological populations over successive generations. These characteristics are the expressions of genes, which are passed on from parent to offspring during reproduction. Variation tends to exist within any given population as a result of genetic mutation and recombination. Evolution occurs when evolutionary processes such as natural selection (including sexual selection) and genetic drift act on this variation, resulting in certain characteristics becoming more common or more rare within a population. The evolutionary pressures that determine whether a characteristic is common or rare within a population constantly change, resulting in a change in heritable characteristics arising over successive generations. It is this process of evolution that has given rise to biodiversity at every level of biological organisation, including the levels of species, individual organisms, and molecules. The theory of evolution by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
