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Thelypodium Eucosmum
''Thelypodium eucosmum'' is a species of flowering plant in the mustard family known by the common names arrow-leaf thelypody and world thelypody. It is endemic to Oregon in the United States, where it is known from Grant and Wheeler Counties.''Thelypodium eucosmum''. Center for Plant Conservation. There are also historical records of the plant from Baker County.''Thelypodium eucosmum''. Oregon Department of Agriculture. This species is a biennial or short-lived perennial herb. It produces an erect, branching stem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brassicaceae
Brassicaceae () or (the older) Cruciferae () is a medium-sized and economically important family of flowering plants commonly known as the mustards, the crucifers, or the cabbage family. Most are herbaceous plants, while some are shrubs. The leaves are simple (although are sometimes deeply incised), lack stipules, and appear alternately on stems or in rosettes. The inflorescences are terminal and lack bracts. The flowers have four free sepals, four free alternating petals, two shorter free stamens and four longer free stamens. The fruit has seeds in rows, divided by a thin wall (or septum). The family contains 372 genera and 4,060 accepted species. The largest genera are ''Draba'' (440 species), ''Erysimum'' (261 species), ''Lepidium'' (234 species), ''Cardamine'' (233 species), and ''Alyssum'' (207 species). The family contains the cruciferous vegetables, including species such as ''Brassica oleracea'' (cultivated as cabbage, kale, cauliflower, broccoli and collards), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bromus Tectorum
''Bromus tectorum'', known as downy brome, drooping brome or cheatgrass, is a winter annual grass native to Europe, southwestern Asia, and northern Africa, but has become invasive in many other areas. It now is present in most of Europe, southern Russia, Japan, South Africa, Australia, New Zealand, Iceland, Greenland, North America and western Central Asia. In the eastern US ''B. tectorum'' is common along roadsides and as a crop weed, but usually does not dominate an ecosystem. It has become a dominant species in the Intermountain West and parts of Canada, and displays especially invasive behavior in the sagebrush steppe ecosystems where it has been listed as noxious weed. ''B. tectorum'' often enters the site in an area that has been disturbed, and then quickly expands into the surrounding area through its rapid growth and prolific seed production. The reduction of native plants and the increased fire frequency caused by ''B. tectorum'' prompted the United States Fish and Wil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Flora Of The United States
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. '' Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to s ... [...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] |
Thelypodium
''Thelypodium'' is a genus of flowering plants in the mustard family. There are 16 to 20 species, all native to western North America. Thelypody is a common name for plants in this genus. Species include: *'' Thelypodium brachycarpum'' - shortpod thelypody *'' Thelypodium crispum'' - crisped thelypody *'' Thelypodium eucosmum'' - world thelypody *'' Thelypodium flexuosum'' - nodding thelypody *'' Thelypodium howellii'' - Howell's thelypody *''Thelypodium integrifolium'' - entireleaved thelypody *''Thelypodium laciniatum'' - cutleaf thelypody *'' Thelypodium laxiflorum'' - droopflower thelypody *'' Thelypodium milleflorum'' - manyflower thelypody *'' Thelypodium paniculatum'' - northwestern thelypody *'' Thelypodium repandum'' - wavyleaf thelypody *'' Thelypodium rollinsii'' - Rollins' thelypody *''Thelypodium sagittatum ''Thelypodium'' is a genus of flowering plants in the mustard family. There are 16 to 20 species, all native to western North America. Thelypody is a common nam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Local Extinction
Local extinction, also known as extirpation, refers to a species (or other taxon) of plant or animal that ceases to exist in a chosen geographic area of study, though it still exists elsewhere. Local extinctions are contrasted with global extinctions. Local extinctions mark a change in the ecology of an area. In recent times, local extinction has sometimes been followed by a replacement of the species taken from other locations; wolf reintroduction is an example of this. The term "local extinction" is highly vernacular. The more proper biological term is ''extirpation''. Discussion Glaciation can lead to local extinction. This was the case during the Pleistocene glaciation event in North America. During this period, most of the native North American species of earthworm were killed in places covered by glaciation. This left them open for colonization by European earthworms brought over in soil from Europe. Species naturally become extirpated from islands over time. The number ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grazing
In agriculture, grazing is a method of animal husbandry whereby domestic livestock are allowed outdoors to roam around and consume wild vegetations in order to convert the otherwise indigestible (by human gut) cellulose within grass and other forages into meat, milk, wool and other animal products, often on land unsuitable for arable farming. Farmers may employ many different strategies of grazing for optimum production: grazing may be continuous, seasonal, or rotational within a grazing period. Longer rotations are found in ley farming, alternating arable and fodder crops; in rest rotation, deferred rotation, and mob grazing, giving grasses a longer time to recover or leaving land fallow. Patch-burn sets up a rotation of fresh grass after burning with two years of rest. Conservation grazing proposes to use grazing animals to improve the biodiversity of a site, but studies show that the greatest benefit to biodiversity comes from removing grazing animals from the landscape. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urtica Dioica
''Urtica dioica'', often known as common nettle, burn nettle, stinging nettle (although not all plants of this species sting) or nettle leaf, or just a nettle or stinger, is a herbaceous perennial flowering plant in the family Urticaceae. Originally native to Europe, much of temperate Asia and western North Africa, it is now found worldwide, including New Zealand and North America. The species is divided into six subspecies, five of which have many hollow stinging hairs called trichomes on the leaves and stems, which act like hypodermic needles, injecting histamine and other chemicals that produce a stinging sensation upon contact ("contact urticaria", a form of contact dermatitis). The plant has a long history of use as a source for traditional medicine, food, tea, and textile raw material in ancient (such as Saxon) and modern societies. Description ''Urtica dioica'' is a dioecious, herbaceous, perennial plant, tall in the summer and dying down to the ground in winter. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sarcobatus Vermiculatus
''Sarcobatus'' is a North American genus of two species of flowering plants, formerly considered to be a single species. Common names for ''S. vermiculatus'' include greasewood, seepwood, and saltbush. Traditionally, ''Sarcobatus'' has been treated in the family Chenopodiaceae, but the APG III system of 2009 recognizes it as the sole genus in the family Sarcobataceae. Name In Greek, ''sarco'' means 'fleshy' (probably in reference to the fleshy leaves) and batus means 'bramble' (referring to the spiny branches). Description The ''Sarcobatus'' plants are deciduous shrubs growing to 0.5–3 metres tall with spiny branches and green succulent leaves, 10–40 mm long and 1–2 mm broad. The leaves are green, in contrast to the grey-green color of most of the other shrubs within its range. The flowers are unisexual, with the male and female flowers on the same plant and appear from June to August. The species reproduces from seeds and sprouts. ''S. vermiculatus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salix
Willows, also called sallows and osiers, from the genus ''Salix'', comprise around 400 speciesMabberley, D.J. 1997. The Plant Book, Cambridge University Press #2: Cambridge. of typically deciduous trees and shrubs, found primarily on moist soils in cold and temperate regions. Most species are known as willow, but some narrow-leaved shrub species are called osier, and some broader-leaved species are referred to as sallow (from Old English ''sealh'', related to the Latin word ''salix'', willow). Some willows (particularly arctic and alpine species) are low-growing or creeping shrubs; for example, the dwarf willow (''Salix herbacea'') rarely exceeds in height, though it spreads widely across the ground. Description Willows all have abundant watery bark sap, which is heavily charged with salicylic acid, soft, usually pliant, tough wood, slender branches, and large, fibrous, often stoloniferous roots. The roots are remarkable for their toughness, size, and tenacity to live, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Purshia Tridentata
''Purshia tridentata'', with the common name bitterbrush, is a shrub in the genus '' Purshia'' of the family Rosaceae. It is native to mountainous areas of western North America. Common names include antelope bitterbrush, antelope bush, buckbrush, quinine brush, and less commonly deerbrush, blackbrush, and greasewood. Some of these names are shared with other species. Description ''Purshia tridentata'' is a deciduous shrub growing to a height of . It has many branches and slender green, three- to five-lobed leaves 5–20 millimetres long. It is a nitrogen-fixing plant. The flowers are pale yellow, with five petals 6–8 mm long, and darker yellow anthers. The fruit is a cluster of dry, slender, leathery achenes 0.6–2 centimetres long. Varieties There are two named varieties of the species: *''Purshia tridentata var. glandulosa'' — Eastern Sierra Nevada, Southern California *''Purshia tridentata var. tridentata'' Distribution The plant is found ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lepidium
''Lepidium'' is a genus of plants in the mustard/cabbage family, Brassicaceae. The genus is widely distributed in the Americas, Africa, Asia, Europe, and Australia.''Lepidium''. Flora of North America. It includes familiar species such as , , and dittander. General s include peppercress, peppergrass, pepperweed, and pepperwort. Som ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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