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Corylus Johnsonii
''Corylus johnsonii'' is an extinct species of hazel known from fossil fruits found in the Klondike Mountain Formation deposits of northern Washington state, dated to the early Eocene Ypresian stage (). Based on described features, ''C. johnsonii'' is the oldest definite species in the genus ''Corylus''. Distribution and paleoenvironment The description of this species by paleobotanists Kathleen Pigg, Steven Manchester, and Wesley Wehr was based on the study of thirty-four compression fossil specimens found at the UWBM sites B4131 and A0307, the latter being designated the type locality. The specimens are twelve infructescences with attached involucres containing nuts or nut casts, fourteen involucres, and eight isolated paired or single nuts. The holotype specimen is number "SR 98-01-02 A&B", an infructescence with involucre, and is housed in the Stonerose Interpretive Center in Republic, Washington. The species epithet ''johnsonii'' was coined in honor of Kirk R. Johnson ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kathleen B
Kathleen may refer to: People * Kathleen (given name) * Kathleen (singer), Canadian pop singer Places * Kathleen, Alberta, Canada * Kathleen, Georgia, United States * Kathleen, Florida, United States * Kathleen High School (Lakeland, Florida), United States * Kathleen, Western Australia, Western Australia * Kathleen Island, Tasmania, Australia * Kathleen Lumley College, South Australia * Mary Kathleen, Queensland, former mining settlement in Australia Other * ''Kathleen'' (film), a 1941 American film directed by Harold S. Bucquet * ''The Countess Kathleen and Various Legends and Lyrics'' (1892), second poetry collection of William Butler Yeats * Kathleen Ferrier Award, competition for opera singers * Kathleen Mitchell Award, Australian literature prize for young authors * Plan Kathleen, plan for a German invasion of Northern Ireland sanctioned by the IRA Chief of Staff in 1940 * Tropical Storm Kathleen (other) * "Kathleen" (song), a song by Catfish and the Bottle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calybium
The calybium and the cupule make up the accessory fruit of flowering plants in the family Fagaceae. These two parts derive from different flower components. The cupule holds and protects the fruit during its growth and maturation. In some genera (e.g. ''Lithocarpus, Quercus''), it only partly encloses the single nut, while in others (e.g. ''Castanea, Fagus''), it fully encloses the two or more nuts, and splits open at maturity into four valves to release the nuts. It is derived from the vegetative part of the flower (its attachment to the rest of the plant). It is covered by numerous scales. In some (e.g. ''Castanea''), the scales are developed into sharp spines, giving the nut protection from squirrels and other seed predators, while in others (e.g. most ''Quercus''), they are not. In ''Lithocarpus'', the cupule is very hard and bone-like in texture. The calybium (plural: calybia) is the fruit proper. It develops from an inferior ovary, meaning it is initially encased in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oval
An oval () is a closed curve in a plane which resembles the outline of an egg. The term is not very specific, but in some areas (projective geometry, technical drawing, etc.) it is given a more precise definition, which may include either one or two axes of symmetry of an ellipse. In common English, the term is used in a broader sense: any shape which reminds one of an egg. The three-dimensional version of an oval is called an ovoid. Oval in geometry The term oval when used to describe curves in geometry is not well-defined, except in the context of projective geometry. Many distinct curves are commonly called ovals or are said to have an "oval shape". Generally, to be called an oval, a plane curve should ''resemble'' the outline of an egg or an ellipse. In particular, these are common traits of ovals: * they are differentiable (smooth-looking), simple (not self-intersecting), convex, closed, plane curves; * their shape does not depart much from that of an ellipse, and * an o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peduncle (botany)
In botany, a peduncle is a stalk supporting an inflorescence or a solitary flower, or, after fecundation, an infructescence or a solitary fruit. The peduncle sometimes has bracts (a type of cataphylls) at nodes. The main axis of an inflorescence above the peduncle is the rachis. There are no flowers on the peduncle but there are flowers on the rachis. When a peduncle arises from the ground level, either from a compressed aerial stem or from a subterranean stem (rhizome, tuber, bulb, corm), with few or no bracts except the part near the rachis or receptacle, it is referred to as a scape. The acorns of the pedunculate oak are borne on a long peduncle, hence the name of the tree. See also *Pedicel (botany) *Scape (botany) In botany, a scape is a peduncle arising from a subterranean or very compressed stem, with the lower internodes very long and hence few or no bracts except the part near the rachis or receptacle. Typically it takes the form of a long, leafles ... Re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleocene
The Paleocene, ( ) or Palaeocene, is a geological epoch (geology), epoch that lasted from about 66 to 56 mya (unit), million years ago (mya). It is the first epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name is a combination of the Ancient Greek ''palaiós'' meaning "old" and the Eocene Epoch (which succeeds the Paleocene), translating to "the old part of the Eocene". The epoch is bracketed by two major events in Earth's history. The K–Pg extinction event, brought on by Chicxulub impact, an asteroid impact and possibly volcanism, marked the beginning of the Paleocene and killed off 75% of living species, most famously the non-avian dinosaurs. The end of the epoch was marked by the Paleocene–Eocene Thermal Maximum (PETM), which was a major climatic event wherein about 2,500–4,500 gigatons of carbon were released into the atmosphere and ocean systems, causing a spike in global temperatures and ocean acidification. In the Pal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sichuan Province
Sichuan (; zh, c=, labels=no, ; zh, p=Sìchuān; alternatively romanized as Szechuan or Szechwan; formerly also referred to as "West China" or "Western China" by Protestant missions) is a province in Southwest China occupying most of the Sichuan Basin and the easternmost part of the Tibetan Plateau between the Jinsha River on the west, the Daba Mountains in the north and the Yungui Plateau to the south. Sichuan's capital city is Chengdu. The population of Sichuan stands at 83 million. Sichuan neighbors Qinghai to the northwest, Gansu to the north, Shaanxi to the northeast, Chongqing to the east, Guizhou to the southeast, Yunnan to the south, and the Tibet Autonomous Region to the west. In antiquity, Sichuan was the home of the ancient states of Ba and Shu. Their conquest by Qin strengthened it and paved the way for Qin Shi Huang's unification of China under the Qin dynasty. During the Three Kingdoms era, Liu Bei's state of Shu was based in Sichuan. The area was de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Speciation
Speciation is the evolutionary process by which populations evolve to become distinct species. The biologist Orator F. Cook coined the term in 1906 for cladogenesis, the splitting of lineages, as opposed to anagenesis, phyletic evolution within lineages. Charles Darwin was the first to describe the role of natural selection in speciation in his 1859 book ''On the Origin of Species''. He also identified sexual selection as a likely mechanism, but found it problematic. There are four geographic modes of speciation in nature, based on the extent to which speciating populations are isolated from one another: allopatric speciation, allopatric, peripatric speciation, peripatric, parapatric speciation, parapatric, and sympatric speciation, sympatric. Speciation may also be induced artificially, through animal husbandry, agriculture, or laboratory experiments of speciation, laboratory experiments. Whether genetic drift is a minor or major contributor to speciation is the subject of much ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corylus Heterophylla
''Corylus heterophylla'', the Asian hazel, is a species of hazel native to eastern Asia in northern and central China, Korea, Japan, and southeastern Siberia.Flora of China''Corylus heterophylla''/ref> It is a deciduous shrub or small tree growing to tall, with stems up to thick grey bark. The leaves are rounded, long and broad, with a coarsely double-serrated to somewhat lobed margin and an often truncated apex. The flowers are wind-pollinated catkins; the male (pollen) catkins are pale yellow, long, while the female catkins are bright red and only long. The fruit is a nut produced in clusters of 2–6 together; each nut is diameter, partly enclosed in a long, bract-like involucre ( husk).Bean, W. J. (1976). ''Trees and Shrubs Hardy in the British Isles'' 8th ed., vol. 1. John Murray . It is very similar to the closely related common hazel ''Corylus avellana'', the common hazel, is a species of flowering plant in the birch family Betulaceae. It is native to Europ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corylus Wangii
The hazel (''Corylus'') is a genus of deciduous trees and large shrubs native to the temperate Northern Hemisphere. The genus is usually placed in the birch family Betulaceae,Germplasmgobills Information Network''Corylus''Rushforth, K. (1999). ''Trees of Britain and Europe''. Collins .Huxley, A., ed. (1992). ''New RHS Dictionary of Gardening''. Macmillan . though some botanists split the hazels (with the hornbeams and allied genera) into a separate family Corylaceae. The fruit of the hazel is the hazelnut. Hazels have simple, rounded leaves with double-serrate margins. The flowers are produced very early in spring before the leaves, and are monoecious, with single-sex catkins. The male catkins are pale yellow and long, and the female ones are very small and largely concealed in the buds, with only the bright-red, 1-to-3 mm-long styles visible. The fruits are nuts long and 1–2 cm diameter, surrounded by an involucre (husk) which partly to fully encloses the nut. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corylus Ferox
''Corylus ferox'', the Himalayan hazelnut or Tibetan hazelnut, is a species of hazel native to the Himalayas of eastern Asia.''Corylus ferox'' - Wall. Plants for a Future. Accessed 21 February 2019 Description The Himalayan hazelnut is a growing to tall, with a monoecious leaf that can individually be male or female and some can be both sexes. The are rounded or elliptic, long and broad, with a fine and sharply serrated margin and an often trunc ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Republic, Washington
Republic is a city in Ferry County, Washington, United States. The population was 1,073 at the 2010 census, a 12.5% increase over the 2000 census. It is the county seat of Ferry County. It was the largest mining camp in the Republic Mining District, and home to the "Hot Air Line" railway. Geography Republic is located at (48.648159, −118.734947). According to the United States Census Bureau, the city has a total area of , all of it land. Republic is located near the source of the Sanpoil River in a long graben valley bordered by the Okanagan Highlands to the west and the Kettle mountain range to the east. Curlew Lake, long (Elev: ), provides fishing and boating to summer visitors northeast of Republic. Swan Lake is small mountain lake to the south of Republic and also serves to be a popular lake for local residents and tourists to visit. Republic is surrounded by the Colville National Forest and to the south is the Colville Indian Reservation. History Republic Mining ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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