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Calochortus Persistens
''Calochortus persistens'' is a rare North American species of flowering plant in the lily family known by the common name Siskiyou mariposa lily. It is native to northern California and southern Oregon. ''Calochortus persistens'' grows at about nine sites scattered on the Gunsight-Humbug Ridge in Siskiyou County, California; in several locations on Cottonwood Peak and Little Cottonwood Peak, also in Siskiyou County; and in one population of just a few individuals on Bald Mountain near Ashland in Jackson County, Oregon,USFWS. (2007)Species Assessment and Listing Priority Assignment Form/ref> ''Calochortus persistens'' grows on rocky slopes in acidic soils and talus. This is a perennial herb producing an unbranching stem around 10 centimeters tall. There is generally one basal leaf about 20 centimeters long which persists in flowering, and one smaller leaf higher up on the stem. The inflorescence is a pair of erect, bell-shaped flowers with pinkish-purple sepals and petals 3. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Francis Marion Ownbey
Francis Marion Ownbey (29 September 1910 - 1974) was an American botanist. Ownbey earned his Ph.D. at the Washington University in St. Louis, with Jesse More Greenman, Jesse M. Greenman. Ownbey began to teach at Washington State University in 1939, and became director of the herbarium. During World War II, he was sent to Ecuador as part of the Cinchona Missions. Ownbey was especially interested in the genus ''Tragopogon''. He was awarded a Guggenheim fellowship in 1954 for his investigation into the genetics of the genus. He died in 1974, and the herbarium at WSU was named in his honor. His brother, , was also a published botanist. Select publications Books * Francis Marion Ownbey, Hannah Caroline Aase. 1955. ''Cytotaxonomic studies in Allium''. p. 1-3, Research Studies of the State College of Washington: Monographic supplement. Editor State College of Washington, 106 pp. * Francis Marion Ownbey. 1939. ''A monograph of the genus Calochortus''. Editor Washington Univ. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Invasive Species
An invasive species otherwise known as an alien is an introduced organism that becomes overpopulated and harms its new environment. Although most introduced species are neutral or beneficial with respect to other species, invasive species adversely affect habitats and bioregions, causing ecological, environmental, and/or economic damage. The term can also be used for native species that become harmful to their native environment after human alterations to its food webfor example the purple sea urchin (''Strongylocentrotus purpuratus'') which has decimated kelp forests along the northern California coast due to overharvesting of its natural predator, the California sea otter (''Enhydra lutris''). Since the 20th century, invasive species have become a serious economic, social, and environmental threat. Invasion of long-established ecosystems by organisms is a natural phenomenon, but human-facilitated introductions have greatly increased the rate, scale, and geographic range of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of Oregon
This is a list of plants by common name that are native to the U.S. state of Oregon. * Adobe parsley * Alaska blueberry * American wild carrot * Austin's popcornflower * Awned melic *Azalea * Azure penstemon * Baby blue eyes * Baldhip rose * Beach strawberry * Beach wormwood * Bearded lupine *Bensoniella *Bigleaf maple * Bigleaf sedge * Birdnest buckwheat * Birthroot, western trillium *Bitter cherry * Bleeding heart * Blow-wives * Blue elderberry *Bog Labrador tea * Bolander's lily * Bridges' cliffbreak * Brook wakerobin * Brown dogwood * Buckbrush * Bugle hedgenettle * Bunchberry * California broomrape * California buttercup * California canarygrass *California goldfields * California milkwort * California phacelia * California stoneseed *California wild rose * Camas * Canary violet * Canyon gooseberry * Cascara * Castle Lake bedstraw * Charming centaury * Chinese caps * Citrus fawn lily * Coastal cryptantha * Coastal sand-verbena * Coastal sneezeweed * Coastal woodfern * Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of California
Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous) native plants. Sometimes bacteria and fungi are also referred to as flora, as in the terms '' gut flora'' or '' skin flora''. Etymology The word "flora" comes from the Latin name of Flora, the goddess of plants, flowers, and fertility in Roman mythology. The technical term "flora" is then derived from a metonymy of this goddess at the end of the sixteenth century. It was first used in poetry to denote the natural vegetation of an area, but soon also assumed the meaning of a work cataloguing such vegetation. Moreover, "Flora" was used to refer to the flowers of an artificial garden in the seventeenth century. The distinction between vegetation (the general appearance of a community) and flora (the taxonomic composition of a community) was first made by Jules Thurmann (1849). Prior to this, the two terms were used indiscriminately.Thurmann, J. (1849). ''Essai de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of The Klamath Mountains
Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous) native plants. Sometimes bacteria and fungi are also referred to as flora, as in the terms ''gut flora'' or '' skin flora''. Etymology The word "flora" comes from the Latin name of Flora, the goddess of plants, flowers, and fertility in Roman mythology. The technical term "flora" is then derived from a metonymy of this goddess at the end of the sixteenth century. It was first used in poetry to denote the natural vegetation of an area, but soon also assumed the meaning of a work cataloguing such vegetation. Moreover, "Flora" was used to refer to the flowers of an artificial garden in the seventeenth century. The distinction between vegetation (the general appearance of a community) and flora (the taxonomic composition of a community) was first made by Jules Thurmann (1849). Prior to this, the two terms were used indiscriminately.Thurmann, J. (1849). ''Essai de Phy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calochortus
''Calochortus'' is a genus of flowering plants in the lily family. The group includes herbaceous, perennial and bulbous species, all native to North America (primarily the Western United States). The genus ''Calochortus'' includes mariposas (or mariposa lilies) with open wedge-shaped petals, globe lilies and fairy lanterns with globe-shaped flowers, and cat's ears and star tulips with erect pointed petals. The word ''Calochortus'' is derived from Greek and means "beautiful grass". Description ''Calochortus'' flowers have six tepals. Unlike most other Liliaceae, ''Calochortus'' tepals are in two series that differ in size and color. The outer three are generally narrower and more sepal-like, while the inner three are larger, usually with bright marks at the base. They may be described as petals. The flowers are borne on a stem that arises from a bulb, generally in the spring or early summer. Flowers can be white, yellow, pink, purple, bluish, or streaked. The insides of the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cercocarpus Ledifolius
''Cercocarpus ledifolius'' is a North American species of mountain mahogany known by the common name curl-leaf mountain mahogany. It is widespread across much of the Western United States as well as Baja California in Mexico. It can be found at elevations ranging from 600 to 3,000 m (2,000 to 9,800 ft) elevation, with the preferred altitude varying depending on the region. It prefers shallow, well-drained soils with a sandy or grainy consistency, and is generally found in areas which receive low annual precipitation (15–26 cm). This makes it common on low mountains and slopes, where it grows in scattered groves among other drought-resistant species such as Pinyon Pines, Junipers and Sagebrush ecosystems. Description ''Cercocarpus ledifolius'' is a large, densely branching tree which can reach heights of 11 m (35 ft), although it is not uncommon to find the adult plant as a shrub as short as 1 m (3 ft). Its leathery, sticky, dark green leaves are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mahonia Aquifolium
''Mahonia aquifolium'', the Oregon grape or holly-leaved barberry, is a species of flowering plant in the family Berberidaceae, native to western North America. It is an evergreen shrub growing tall and wide, with pinnate leaves consisting of spiny leaflets, and dense clusters of yellow flowers in early spring, followed by dark bluish-black berries. The berries are included in the diet of some aboriginal peoples of the Pacific Northwest, and the species is recognized as the state flower of Oregon. Description ''M. aquifolium'' grows to tall by wide. The stems and twigs have a thickened, corky appearance. The leaves are pinnate and up to long, comprising spiny leaflets. The leathery leaves resemble those of holly. The yellow flowers are borne in dense clusters long in late spring. Each of the six stamens, terminates in two spreading branches. The six yellow petals are enclosed by six yellow sepals. At the base of the flower are three greenish-yellow bracts, less than half as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shrub
A shrub (often also called a bush) is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees by their multiple stems and shorter height, less than tall. Small shrubs, less than 2 m (6.6 ft) tall are sometimes termed as subshrubs. Many botanical groups have species that are shrubs, and others that are trees and herbaceous plants instead. Some definitions state that a shrub is less than and a tree is over 6 m. Others use as the cut-off point for classification. Many species of tree may not reach this mature height because of hostile less than ideal growing conditions, and resemble a shrub-sized plant. However, such species have the potential to grow taller under the ideal growing conditions for that plant. In terms of longevity, most shrubs fit in a class between perennials and trees; some may only last about five y ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allelopathy
Allelopathy is a biological phenomenon by which an organism produces one or more biochemicals that influence the germination, growth, survival, and reproduction of other organisms. These biochemicals are known as allelochemicals and can have beneficial (positive allelopathy) or detrimental (negative allelopathy) effects on the target organisms and the community. Allelopathy is often used narrowly to describe chemically-mediated competition between plants; however, it is sometimes defined more broadly as chemically-mediated competition between any type of organisms. Allelochemicals are a subset of secondary metabolites, which are not directly required for metabolism (i.e. growth, development and reproduction) of the allelopathic organism. Allelopathic interactions are an important factor in determining species distribution and abundance within plant communities, and are also thought to be important in the success of many invasive plants. For specific examples, see black walnut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isatis Tinctoria
''Isatis tinctoria'', also called woad (), dyer's woad, or glastum, is a flowering plant in the family Brassicaceae (the mustard family) with a documented history of use as a blue dye and medicinal plant. Its genus name, Isatis, derives from the ancient Greek word for the plant, ἰσάτις. It is occasionally known as Asp of Jerusalem. Woad is also the name of a blue dye produced from the leaves of the plant. Woad is native to the steppe and desert zones of the Caucasus, Central Asia to Eastern Siberia and Western Asia but is now also found in South-Eastern and Central Europe and western North America. Since ancient times, woad was an important source of blue dye and was cultivated throughout Europe, especially in Western and Southern Europe. In medieval times, there were important woad-growing regions in England, Germany and France. Towns such as Toulouse became prosperous from the woad trade. Woad was eventually replaced by the more colourfast ''Indigofera tinctoria'' and ... [...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] |
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