|
Physaria Thamnophila
''Physaria thamnophila'' (syn. ''Lesquerella thamnophila'') is a rare species of flowering plant in the mustard family known by the common name Zapata bladderpod. It is native to Texas in the United States, where it is known from Zapata and Starr Counties.''Lesquerella perforata''. The Nature Conservancy. The plant is threatened by the loss and degradation of its .USFWS ''Lesquerella thamnophila'' Recovery Plan. July 2004. It is federally listed as an |
Synonym (taxonomy)
The Botanical and Zoological Codes of nomenclature treat the concept of synonymy differently. * In botanical nomenclature, a synonym is a scientific name that applies to a taxon that (now) goes by a different scientific name. For example, Linnaeus was the first to give a scientific name (under the currently used system of scientific nomenclature) to the Norway spruce, which he called ''Pinus abies''. This name is no longer in use, so it is now a synonym of the current scientific name, ''Picea abies''. * In zoology, moving a species from one genus to another results in a different binomen, but the name is considered an alternative combination rather than a synonym. The concept of synonymy in zoology is reserved for two names at the same rank that refers to a taxon at that rank - for example, the name ''Papilio prorsa'' Linnaeus, 1758 is a junior synonym of ''Papilio levana'' Linnaeus, 1758, being names for different seasonal forms of the species now referred to as ''Araschnia le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erosion
Erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location where it is deposited. Erosion is distinct from weathering which involves no movement. Removal of rock or soil as clastic sediment is referred to as ''physical'' or ''mechanical'' erosion; this contrasts with ''chemical'' erosion, where soil or rock material is removed from an area by dissolution. Eroded sediment or solutes may be transported just a few millimetres, or for thousands of kilometres. Agents of erosion include rainfall; bedrock wear in rivers; coastal erosion by the sea and waves; glacial plucking, abrasion, and scour; areal flooding; wind abrasion; groundwater processes; and mass movement processes in steep landscapes like landslides and debris flows. The rates at which such processes act control how fast a surface is eroded. Typically, physical erosion procee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nurse Tree
A nurse tree is a larger, faster-growing tree that shelters a smaller, slower-growing tree or plant. The nurse tree can provide shade, shelter from wind, and protection from animals that would feed on the smaller plant and significant changes in temperature. Fallen leaves from the nurse tree fertilize the ground underneath creating nutrient-rich soil for the saplings and vegetation beneath. Some nurse trees act as Nitrogen-fixing agents in the soil. The nurse tree relationship occurs both naturally and via human intervention. Examples The Norway spruce (''Picea abies'') and larch (''Larix'') can function as nurses for hardwoods. In the Sonoran Desert, Palo Verde, ironwood and mesquite trees serve as nurse trees for young saguaro cacti The saguaro (, ) (''Carnegiea gigantea'') is a tree-like cactus species in the monotypic genus ''Carnegiea'' that can grow to be over tall. It is native to the Sonoran Desert in Arizona, the Mexican state of Sonora, and the Whipple Mountain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guaiacum Angustifolium
''Guaiacum angustifolium'' is a species of flowering plant in the caltrop family, Zygophyllaceae. Common names include Texas guaiacum, Texas lignum-vitae, soapbush and huayacán. It is native to southern and western Texas in the United States and northern Mexico. The specific name is derived from the Latin ''angustus'', meaning "narrow," and ''-folius'', meaning "-leaved". Location This tree can be found in the area around the Rio Grande, including Austin, Matagorda Bay, New Braunfels, San Antonio, Brownsville and Fort McIntosh westward to the Rio Pecos. In the 19th century trees growing along the outskirts of this region were so small they were described by the United States Department of Interior as "low shrub(s)". The largest examples could be found on the hillsides near the Guadalupe river valley. Description Texas lignum-vitae is a many branched shrub or small tree, reaching a height of . This evergreen has a dense canopy and short lateral branches. Leaves Leaves ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zizyphus Obtusifolia
''Ziziphus obtusifolia'' is a species of flowering plant in the buckthorn family known by several common names, including lotebush, graythorn, gumdrop tree, and Texas buckthorn. Distribution The plant is native to the South Central and Southwestern United States, the California deserts, and central through northern Mexico. It grows in shrubby and scrubby desert habitats, grasslands and prairie, woodlands, and other habitat types. It can be found among desert plants such as honey mesquite, smooth mesquite, ocotillo and creosote. Description ''Ziziphus obtusifolia'' is a shrub with many branches forming a thorny tangle which may exceed tall and approach at times. The leaves are deciduous and are absent for much of the year, leaving the shrub a naked thicket of gray twigs coated in waxy whitish hairs. The ends of the twigs taper into sharp-tipped thorns. The thick, glandular gray or green leaves have oval blades 1 or 2 centimeters long. The inflorescence is a cluster of sever ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yucca Treculeana
''Yucca treculeana'' Carrière is a plant in the family Asparagaceae, native to Texas, New Mexico and Coahuila. Common names include Spanish dagger, Spanish bayonet and Don Quixote's lance. ''Yucca treculeana'' is a large, tree-like species up to 10 m (33 feet) tall, often branching above the ground. Leaves are up to 128 cm (50 inches) long. Flowers are cream-colored, sometimes tinged with purple. Fruits are fleshy and succulent, up to 19 cm (7.5 inches) long. In the last three generations, it has experienced a population decline of 30 percent, attributable due to habitat loss. Some sources list this species as "''Yucca spinosa'' Kunth." However, the type specimen for this name at the herbarium in Berlin appears to be ''Dasylirion ''Dasylirion'' is a genus of North American plants in the asparagus family, all native to Mexico, with the ranges of three species also extending into the south-western United States. In the APG III classification system, it is placed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Celtis Pallida
''Celtis ehrenbergiana'', called the desert hackberry or spiny hackberry, is a plant species that has long been called ''C. pallida'' by many authors, including in the "Flora of North America" database. It is native to Arizona, Florida, New Mexico and Texas, and to Latin America as far south as central Argentina. It grows in dry locations such as deserts, brushlands, canyons, mesas and grasslands. ''Celtis ehrenbergiana'' is the only US species of the genus with thorns. In the US, it is a shrub or small tree up to 3 m (10 feet) tall, with thorns on the branches, although it can grow taller in the tropics. Leaves are small for the genus, less than 3 cm (1.2 inches) long and 2 cm (0.8 inches) wide. Flowers are born in cymes of 3–5 flowers. Drupe In botany, a drupe (or stone fruit) is an indehiscent fruit in which an outer fleshy part (exocarp, or skin, and mesocarp, or flesh) surrounds a single shell (the ''pit'', ''stone'', or '' pyrena'') of hardened endocarp with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prosopis
''Prosopis'' is a genus of flowering plants in the family Fabaceae. It contains around 45 species of spiny trees and shrubs found in subtropical and tropical regions of the Americas, Africa, Western Asia, and South Asia. They often thrive in arid soil and are resistant to drought, on occasion developing extremely deep root systems. Their wood is usually hard, dense and durable. Their fruits are pods and may contain large amounts of sugar. The generic name means "burdock" in late Latin and originated in the Greek language. Selected species *Mesquites (southern United States, Mexico) ** ''Prosopis glandulosa'' Torr. – honey mesquite; ''Haas'' ( Cmiique Iitom) ** ''Prosopis laevigata'' ( Humb. & Bonpl. ex Willd.) M.C.Johnst. – smooth mesquite ** ''Prosopis pubescens'' Benth. – screwbean mesquite ** ''Prosopis reptans'' Benth. – tornillo ** ''Prosopis velutina'' Wooton – velvet mesquite *"Algarrobos", bayahondas etc. (Neotropics, particularly the Gra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acacia Rigidula
''Vachellia rigidula'', commonly known as blackbrush acacia or chaparro prieto, and also known as ''Acacia rigidula'', is a species of shrub or small tree in the legume family, Fabaceae. Its native range stretches from Texas in the United States south to central Mexico. This perennial is not listed as being threatened. It reaches a height of . Blackbrush Acacia grows on limestone hillsides and canyons. Phytochemistry A phytochemical study of ''V. rigidula'' by workers at the Texas A & M University Agricultural Research and Extension Center at Uvalde, TX, reported the presence of over forty alkaloids, including low amounts (up to around 15 ppm) of several amphetamines that had previously been found by the same research group in the related species ''Senegalia berlandieri'', but which otherwise are known only as products of laboratory synthesis. Compounds found in the highest concentrations (ranging from a few hundred to a few thousand ppm) were phenethylamine, ''N''-methy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acacia Berlandieri
''Senegalia berlandieri'' (Berlandier acacia, guajillo acacia, guajillo, huajillo, huajilla) is a shrub native to the Southwestern United States and northeast Mexico that belongs to the Mimosoid clade of Fabaceae. It grows tall, with blossoms that are spherical and white, occurring from February through April. The ''berlandieri'' epithet comes from the name of Jean-Louis Berlandier, a French naturalist who studied wildlife native to Texas and Mexico. ''S. berlandieri'' contains a wide variety of alkaloids and has been known to cause toxic reactions in domestic animals such as goats.B.A. Clement, C. M. Goff and T. D. A. Forbes (1997). "Toxic amines and alkaloids from ''Acacia berlandieri''." ''Phytochemistry'' 46 249-254. Uses ''Senegalia berlandieri'' is toxic to livestock and thus should not be used as forage or fodder. Alkaloids ''Senegalia berlandieri'' contains a number of diverse alkaloids, the most plentiful of which are ''N''-methylphenethylamine, tyramine, and phen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucophyllum Frutescens
''Leucophyllum frutescens'' is an evergreen shrub in the figwort family, Scrophulariaceae, native to the U.S. state of Texas, where it is the official "State Native Shrub of Texas", and to the states of Coahuila, Nuevo León, and Tamaulipas in northern Mexico. Although commonly known as Texas sage, it is not a true sage and is distinct from the genus ''Salvia''. The species is also called Texas Ranger, Texas rain sage, ''cenizo'', Texas silverleaf, Texas barometerbush, ash-bush, wild lilac, purple sage, ''senisa'', ''cenicilla'', ''palo cenizo'', or ''hierba del cenizo''. The solitary axillary flowers are bell- or funnel-shaped, with five lobes and two lips. This species is found in rocky, calcareous soils. Cultivation Texas sage is a popular ornamental plant, commonly used for edge and area plantings in warmer and drier areas; it requires minimal water, is easily shaped into hedges, and blooms over the entire surface. It is available in a variety of cultivar A cultivar i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
