Tetradymia Filifolia
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Tetradymia Filifolia
''Tetradymia'' is a genus of North American shrubs in the groundsel tribe within the sunflower family.Candolle, Augustin Pyramus de, 1838. Prodromus Systematis Naturalis Regni Vegetabilis 6: 440
in Latin
Horsebrush is a common name for plants in this genus. ; SpeciesFlann, C (ed) 2009+ Global Compositae Checklist
Strother, J. L. 1974. Taxonomy of ''Tetradymia'' (Compositae: Senecioneae). Brittonia 26: 177–202. ; formerly included see ''
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Tetradymia Axillaris
''Tetradymia axillaris'' is a flowering plant in the daisy family known by the common names longspine horsebrush and cottonthorn. This is a plant of the sagebrush and desert plant communities of the southwestern United States. The plant forms a sprawling thicket and is very spiny. The green leaves dry and their tissues fall away, leaving the veins as hard, sharp spines. When in foliage the bush has green, hairy stems and bears yellow daisylike flowerheads in the axils, or angles, of the newest branches. The fruits are released in masses of cottony seed. There are two varieties of the species, var. ''axillaris'' and var. ''longispina''. They grow together in some areas and there their characteristics may intergrade.''Tetradymia axillaris''.
Flora of North America.
The sharp spines were used as
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Washington (state)
Washington (), officially the State of Washington, is a state in the Pacific Northwest region of the Western United States. Named for George Washington—the first U.S. president—the state was formed from the western part of the Washington Territory, which was ceded by the British Empire in 1846, by the Oregon Treaty in the settlement of the Oregon boundary dispute. The state is bordered on the west by the Pacific Ocean, Oregon to the south, Idaho to the east, and the Canadian province of British Columbia to the north. It was admitted to the Union as the 42nd state in 1889. Olympia is the state capital; the state's largest city is Seattle. Washington is often referred to as Washington state to distinguish it from the nation's capital, Washington, D.C. Washington is the 18th-largest state, with an area of , and the 13th-most populous state, with more than 7.7 million people. The majority of Washington's residents live in the Seattle metropolitan area, the center of trans ...
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Tetradymia Tetrameres
''Tetradymia tetrameres'' is a species of flowering plant in the aster family known by the common name fourpart horsebrush and dune horsebrush. It is native to the Great Basin, where it occurs in western Nevada and just over the border in Mono County, California. It is a plant of dry scrub and sand dunes. It is a bushy, woolly shrub with many erect, spineless branches. It is the largest of the horsebrushes, growing up to two meters in height.Mozingo, H. N. (1987). Shrubs of the Great Basin: A Natural History.' University of Nevada Press 317-8. The soft, woolly leaves are narrow and threadlike, growing up to 4 centimeters long. Shorter leaves occur in clusters around the primary leaves. The inflorescence bears 4 to 6 flower heads which are each enveloped in four or five woolly phyllaries. Each head contains up to four or five light yellow flowers each around a centimeter long. The fruit is a hairy achene An achene (; ), also sometimes called akene and occasionally achenium or ...
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Tetradymia Stenolepis
''Tetradymia stenolepis'' is a species of flowering plant in the aster family known by the common name Mojave cottonthorn. It is native to the deserts around the intersection of Arizona, Nevada, and eastern California, where it grows in woodland and scrub habitat on sandy and gravelly substrates. It is a bushy shrub with many branches coated in woolly white fibers and growing to a maximum height just over a meter. The narrow leaves are 2 or 3 centimeters long and harden into straight, sharp spines. Clusters of woolly leaves grow near the spines. The inflorescence bears up to 7 flower heads which are each enveloped in four or five woolly phyllaries. Each head contains up to four or five tubular yellow flowers each around a centimeter long. The fruit is a hairy achene An achene (; ), also sometimes called akene and occasionally achenium or achenocarp, is a type of simple dry fruit produced by many species of flowering plants. Achenes are monocarpellate (formed from one carpel) a ...
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Tetradymia Spinosa
''Tetradymia spinosa'' is a species of flowering plant in the aster family known by the common name shortspine horsebrush. It is native to the western United States, especially the basins and plateaus west of the Rocky Mountains. It grows in sagebrush, woodlands, and scrub habitat, often among shadscale in alkaline areas such as playas. It is a bushy shrub with many branches coated in woolly white fibers and growing to a maximum height around a meter. The leaves are narrow, curving, and hooklike, hardening into sharp spines up to 2.5 centimeters long. The inflorescence bears one or two flower heads which are each enveloped in four to six woolly phyllaries. Each head contains up to 8 tubular yellow disc flowers up to 1 cm long. The fruit is a densely hairy achene which may be nearly 2 cm long, including its pappus of long bristles. The plant is extremely toxic, although it is unpalatable and unlikely to be eaten. Consumption causes liver damage and extreme light sensitivity, whi ...
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Tetradymia Nuttallii
''Tetradymia nuttallii'' is a species of flowering plant in the aster family known by the common name Nuttall's horsebrush. It is native to the western United States, where it occurs in Nevada, Utah, Wyoming, and Colorado.Howard, Janet L. 2002''Tetradymia nuttallii''.In: Fire Effects Information System, nline U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. This shrub or subshrub has a stiff, branching network of stems reaching up to 1.2 meters in maximum height. Like other ''Tetradymia'', this species has two types of leaves. The larger, primary leaves become spines which may be over 2 centimeters in length. The inflorescence is made up of a few flower heads, each of which contains four bright yellow flowers. The fruit is well over a centimeter long, including its large pappus.
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Tetradymia Glabrata
''Tetradymia glabrata'' is a species of flowering plant in the aster family known by the common name littleleaf horsebrush. It is native to the western United States, especially the Great Basin and Mojave Desert. Its habitat includes sagebrush, woodlands, and scrub. It is an erect, bushy shrub growing to a maximum height over one meter, its stems coated unevenly in white woolly fibers with many bare strips. The narrow, pointed leaves are usually no more than a centimeter long and most occur in clusters along the branches. The inflorescence bears up to seven flower heads which are each enveloped in four woolly phyllaries. Each head contains four yellow cream flowers each around a centimeter long. The fruit is a hairy, ribbed achene An achene (; ), also sometimes called akene and occasionally achenium or achenocarp, is a type of simple dry fruit produced by many species of flowering plants. Achenes are monocarpellate (formed from one carpel) and indehiscent (they do not ope ... ...
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Tetradymia Filifolia
''Tetradymia'' is a genus of North American shrubs in the groundsel tribe within the sunflower family.Candolle, Augustin Pyramus de, 1838. Prodromus Systematis Naturalis Regni Vegetabilis 6: 440
in Latin
Horsebrush is a common name for plants in this genus. ; SpeciesFlann, C (ed) 2009+ Global Compositae Checklist
Strother, J. L. 1974. Taxonomy of ''Tetradymia'' (Compositae: Senecioneae). Brittonia 26: 177–202. ; formerly included see ''
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Tetradymia Comosa
''Tetradymia comosa'' is a species of flowering plant in the aster family, known by the common name hairy horsebrush. Distribution The plant is native to the Transverse Ranges and Peninsular Ranges in Southern California and northern Baja California. It grows in local chaparral and woodlands habitats, such as coastal sage scrub and montane chaparral and woodlands. Description ''Tetradymia comosa'' is a whitish woolly shrub growing to over tall. The leaves are lance-shaped and up to 6 centimeters long, becoming rigid as they age, sometimes with their tips hardening to spines. The inflorescence bears three to six flower heads which are each enveloped in five or six thick phyllaries coated in white woolly hairs. Each head contains five to nine yellow or brownish flowers each around a centimeter long. The fruit is a small, hairy achene An achene (; ), also sometimes called akene and occasionally achenium or achenocarp, is a type of simple dry fruit produced by many specie ...
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New Mexico
) , population_demonym = New Mexican ( es, Neomexicano, Neomejicano, Nuevo Mexicano) , seat = Santa Fe , LargestCity = Albuquerque , LargestMetro = Tiguex , OfficialLang = None , Languages = English, Spanish ( New Mexican), Navajo, Keres, Zuni , Governor = , Lieutenant Governor = , Legislature = New Mexico Legislature , Upperhouse = Senate , Lowerhouse = House of Representatives , Judiciary = New Mexico Supreme Court , Senators = * * , Representative = * * * , postal_code = NM , TradAbbreviation = N.M., N.Mex. , area_rank = 5th , area_total_sq_mi = 121,591 , area_total_km2 = 314,915 , area_land_sq_mi = 121,298 , area_land_km2 = 314,161 , area_water_sq_mi = 292 , area_water_km2 = 757 , area_water_percent = 0.24 , population_as_of = 2020 , population_rank = 36th , 2010Pop = 2,117,522 , population_density_rank = 45th , 2000DensityUS = 17.2 , 2000Density = 6.62 , MedianHouseholdIncome = $51,945 , IncomeRank = 45th , AdmittanceOrder = ...
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Colorado
Colorado (, other variants) is a state in the Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains. Colorado is the eighth most extensive and 21st most populous U.S. state. The 2020 United States census enumerated the population of Colorado at 5,773,714, an increase of 14.80% since the 2010 United States census. The region has been inhabited by Native Americans and their ancestors for at least 13,500 years and possibly much longer. The eastern edge of the Rocky Mountains was a major migration route for early peoples who spread throughout the Americas. "''Colorado''" is the Spanish adjective meaning "ruddy", the color of the Fountain Formation outcroppings found up and down the Front Range of the Rocky Mountains. The Territory of Colorado was organized on February 28, 1861, and on August 1, 1876, U.S. President Ulyss ...
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Oregon
Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of its eastern boundary with Idaho. The 42nd parallel north, 42° north parallel delineates the southern boundary with California and Nevada. Oregon has been home to many Indigenous peoples of the Americas, indigenous nations for thousands of years. The first European traders, explorers, and settlers began exploring what is now Oregon's Pacific coast in the early-mid 16th century. As early as 1564, the Spanish expeditions to the Pacific Northwest, Spanish began sending vessels northeast from the Philippines, riding the Kuroshio Current in a sweeping circular route across the northern part of the Pacific. In 1592, Juan de Fuca undertook detailed mapping and studies of ocean currents in the Pacific Northwest, including the Oregon coast as well as ...
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