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Red Oaks
The genus ''Quercus'' contains about 500 species, some of which are listed here. The genus, as is the case with many large genera, is divided into subgenera and sections. Traditionally, the genus ''Quercus'' was divided into the two subgenera ''Cyclobalanopsis'', the ring-cupped oaks, and ''Quercus'', which included all the other sections. However, a comprehensive revision in 2017 identified different relationships. Now the genus is commonly divided into a subgenus ''Quercus'' and a sugenus ''Cerris'', with ''Cyclobalanopsis'' included in the latter. The sections of subgenus ''Quercus'' are mostly native to the New World, with the notable exception of the white oaks of sect. ''Quercus'' and the endemic Quercus pontica. In contrast, the sections of the subgenus ''Cerris'' are exclusively native to the Old World. Legend Species with evergreen foliage ("live oaks") are tagged '#'. Species in the genus have been recategorized between deciduous and evergreen on numerous occasions, alth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of The Largest Genera Of Flowering Plants
There are over 56 genera of flowering plants estimated to contain at least 500 described species. The largest of these is currently the legume genus ''Astragalus'' (milk-vetches), with over 3,000 species. The sizes of plant genera vary widely from those containing a single species to genera containing thousands of species, and this disparity became clear early in the history of plant classification. The largest genus in Carl Linnaeus' seminal ''Species Plantarum'' was ''Euphorbia'', with 56 species; Linnaeus believed that no genus should contain more than 100 species. Part of the disparity in genus sizes is attributable to historical factors. According to a hypothesis published by Max Walters in 1961, the size of plant genera is related to the age, not of the taxon itself, but of the concept of the taxon in the minds of taxonomists. Plants which grew in Europe, where most of the early taxonomy was based, were therefore divided into relatively small genera, while those from the t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Aliena
''Quercus aliena'', the galcham oak or oriental white oak, is a species of oak in the family Fagaceae, in the white oak section ''Quercus''. Description It is a deciduous tree growing to tall with a trunk up to in diameter with fissured gray-brown bark. The leaves are obovate to oblong, glabrous above, glabrous to densely grey-white hairy below, mostly long and wide (rarely up to long and wide), with 9 to 15 lobes on each side, and a petiole. The flowers monecious catkins. The acorns are long and wide, a third to a half enclosed in a green-grey cup on a short peduncle; they are solitary or 2–3 together, and mature in about six months from pollination. A long-lived tree, it is slow-growing. Taxonomy Three to five varieties are accepted: *''Quercus aliena'' var. ''aliena''. Leaf margin wavy; leaf greyish below. *''Quercus aliena'' var. ''acutiserrata'' Maxim. Leaf margin serrated, with sharp serration; leaf densely hairy below with greyish hairs. *''Quercus aliena'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Cornelius-mulleri
''Quercus cornelius-mulleri'' is a North American species of oak known by the common name Muller oak, or Muller's oak. It was described to science in 1981 when it was segregated from the ''Quercus dumosa'' complex and found to warrant species status of its own. It was named after ecologist Cornelius Herman Muller. It is native to southern California and Baja California, where it grows in chaparral, oak woodlands, and other habitat in foothills and mountains. It can most easily be observed in Joshua Tree National Park and in the woodlands along the western margins of the Colorado Desert in San Diego County, California.Nixon, K. C. (2002)The Oak Biodiversity of California and Adjacent Regions. US Forest Service Gen. Tech. Report Description ''Quercus cornelius-mulleri'' is a bushy shrub not exceeding 3 meters (10 feet) in height. It is densely branched, its tangled twigs gray, brown, or yellowish, fuzzy when new and becoming scaly with age. The evergreen leaves are leathery an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Chihuahuensis
''Quercus chihuahuensis'', the Chihuahua oak, is a species of oak in the beech family.Trelease, Memoirs of the National Academy of Science vol 20. 1924. It is native to the region from extreme western Texas west to Sonora, Mexico, and south to Zacatecas and San Luis Potosí. It grows mostly at mid elevations, from above sea level, in forests mixed with various pines and other oaks. It is one of the dominant species of the Sierra Madre Occidental in Chihuahua and Sonora. The tree grows up to 10 m (33 ft) tall, very common in much of its range. The leaves are entire to toothed or sublobate, green on the top but yellow or gray on the underside because of a coating of velvety, stellate (star-shaped, highly branched) hairs. The species is related to ''Quercus arizonica'' and ''Quercus grisea ''Quercus grisea'', commonly known as the gray oak, shin oak or scrub oak, is a North American species deciduous or evergreen shrub or medium-sized tree in the white oak group. It is native t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Chapmanii
''Quercus chapmanii'', commonly referred to as the Chapman oak, is a species of oak that grows in the southeastern United States. Description ''Quercus chapmanii'' is a shrub or small tree occasionally reaching a height of 6 meters (20 feet) but usually less. Leaves sometimes have no lobes, sometimes wavy rounded lobes. Distribution ''Quercus chapmanii'' is found in the states of Alabama, Florida, Georgia, and South Carolina )''Animis opibusque parati'' ( for, , Latin, Prepared in mind and resources, links=no) , anthem = " Carolina";" South Carolina On My Mind" , Former = Province of South Carolina , seat = Columbia , LargestCity = Charleston , LargestMetro = .... References External links photo of herbarium specimen at Missouri Botanical Garden, collected in Florida circa 1860(with parts of Alabama and Georgia) * ttp://www.pollenlibrary.com/botany_researchers_maps.php?view=species.php&species=Quercus+chapmanii&common=Chapman's+Oak Pollen Library chapmanii Tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Carmenensis
''Quercus carmenensis'', the Mexican oak, is a tree species native to Brewster County, Texas, and Coahuila, Mexico. It grows in pine-oak forests at elevations of . It is a deciduous species with gray bark and red twigs. The leaves A leaf (plural, : leaves) is any of the principal appendages of a vascular plant plant stem, stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", wh ... are lanceolate with irregular lobing along the margins. References External links isotype of ''Quercus carmenensis'', photo of herbarium specimen at Missouri Botanical Garden, collected in Coahuila in 1936 {{Taxonbar, from=Q6323361 carmenensis Flora of Coahuila Flora of Texas Plants described in 1937 Oaks of Mexico ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Brandegeei
''Quercus brandegeei'' is a rare Mexican species of plant in the beech family, Fagaceae, in the oak genus ''Quercus'', series '' Virentes''. It has been found only in the southern part of the State of Baja California Sur in northwestern Mexico. ''Quercus brandegeei'' is an evergreen tree up to tall. Leaves are elliptical, not lobed, the blades up to long and tapering at both ends, sometimes with no teeth on the edge but sometimes with a few pointed teeth. Its habitat is restricted to stream-side locations. The species is listed as endangered by the IUCN Red List and threatened by long-term climatic drying and habitat loss Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby .... References External link The mystery of Mexico's vanishing stream oaks BBC Future brandegeei Endem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Boyntonii
''Quercus boyntonii'' is a rare North American species of oak in the beech family. At present, it is found only in Alabama, although historical records say that it formerly grew in Texas Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2 ... as well. It is commonly called the Boynton sand post oak or Boynton oak. ''Quercus boyntonii'' is a rare and poorly known species. It is a shrub or small tree, sometimes reach a height of 6 meters (20 feet) but usually smaller. Leaves are dark green, hairless and shiny on the upper surface, covered with many gray hairs on the underside. References External links boyntonii Flora of Alabama Endemic flora of the United States Trees of the Southeastern United States Plants described in 1901 Endangered flora of the United States Taxonomy ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus × Bimundorum
''Quercus × bimundorum'' (or ''Quercus bimundorum''), known as two worlds oak, is a naturally occurring hybrid of white oak, ''Quercus alba'' (from the New World), and pedunculate oak, ''Quercus robur ''Quercus robur'', commonly known as common oak, pedunculate oak, European oak or English oak, is a species of flowering plant in the beech and oak family, Fagaceae. It is a large tree, native plant, native to most of Europe west of the Caucasus ...'' (introduced from the Old World). It occurs sporadically where they come in contact in the United States. A tree reaching 12m, there are commercial cultivars available, including 'Crimschmidt', trade designation , with a columnar growth form, and 'Midwest', trade designation , with a pyramidal growth form. References {{DEFAULTSORT:Quercus x bimundorum bimundorum Plants described in 1948 Plant nothospecies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Bicolor
''Quercus bicolor'', the swamp white oak, is a North American species of medium-sized trees in the beech family. It is a common element of America's north central and northeastern mixed forests. It can survive in a variety of habitats. It forms hybrids with bur oak where they occur together in the wild. Description ''Quercus bicolor'' grows rapidly and can reach tall with the tallest known reaching and lives up to 285 years. The bark resembles that of the white oak. The leaves are broad ovoid, long and broad, always more or less glaucous on the underside, and are shallowly lobed with five to seven lobes on each side, intermediate between the chestnut oak and the white oak. In autumn, they turn brown, yellow-brown, or sometimes reddish, but generally, the color is not as reliable or as brilliant as the white oak can be. The fruit is a peduncled acorn, , rarely , long and broad, maturing about six months after pollination. Swamp white oak may live up to 300 years. Dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Berberidifolia
''Quercus berberidifolia'', the California scrub oak, is a small evergreen or semi-evergreen shrubby oak in the white oak section of ''Quercus''. It is a native of the scrubby hills of California, and is a common member of chaparral ecosystems. Description ''Quercus berberidifolia'' grows to tall, rarely to , and has sharply toothed, dull green leaves which are long and broad, leathery on their top surfaces and somewhat hairy underneath. The solitary or paired brown acorns are long and broad, and pointed or egg-shaped with thin caps when mature; they mature in about 6–8 months after pollination. In cooler, more exposed areas, scrub oak is usually a small, compact shrub, but in warm or sheltered areas the plant can spread out and grow several meters high. The epithet ''berberidifolia'' means "barberry-leaved," referring to the spiny leaf margins characteristic of ''Q. berberidifolia'' as well as of several species of ''Berberis.'' Other species The species is often k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus × Bebbiana
''Quercus'' × ''bebbiana'' (or ''Quercus bebbiana''), known as Bebb's oak, is a naturally occurring hybrid of white oak (''Quercus alba'') and burr oak (''Quercus macrocarpa''). It occurs where their ranges overlap in the eastern United States and eastern Canada. It was named for Michael Schuck Bebb (1833–1895), an Illinois botanist who specialized in willows (''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 so ...''). A tree reaching 15m, and available from specialty nurseries, its acorns are sweet enough to be palatable to humans. References {{DEFAULTSORT:Quercus x bebbiana bebbiana Flora of North America Plants described in 1904 Plant nothospecies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
