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Quercus Sect. Cyclobalanopsis
''Quercus'' subgenus ''Cerris'' is one of the two subgenera into which the genus ''Quercus'' was divided in a 2017 classification (the other being subgenus ''Quercus''). It contains about 140 species divided among three sections. It may be called the Old World clade or the mid-latitude clade; all species are native to Eurasia and North Africa. Description Like all species of ''Quercus'', those of subgenus ''Cerris'' are trees or shrubs with acorn-like fruit in which a cup covers at least the base of the nut. Members of subgenus ''Cerris'' are distinguished from members of subgenus ''Quercus'' by few morphological featurs, their separation being largely determined by molecular phylogenetic evidence. The structure of the mature pollen is one feature that distinguishes the two subgenera: in subgenus ''Cerris'', the small folds or wrinkles (rugulae) are visible or at most weakly obscured, whereas in subgenus ''Quercus'', the rugulae are obscured by sporopollenin. The two subgenera ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Cerris
''Quercus cerris'', the Turkey oak or Austrian oak, is an oak native to south-eastern Europe and Asia Minor. It is the type species of ''Quercus'' sect. ''Cerris'', a section of the genus characterised by shoot buds surrounded by soft bristles, bristle-tipped leaf lobes, and acorns that usually mature in 18 months. Description ''Quercus cerris'' is a large deciduous tree growing to tall with a trunk up to in diameter. The bark is dark gray and deeply furrowed. On mature trees, the bark fissures are often streaked orange near the base of the trunk. The glossy leaves are long and 3–5 cm wide, with 6–12 triangular lobes on each side; the regularity of the lobing varies greatly, with some trees having very regular lobes, others much less regular. The flowers are wind-pollinated catkins, maturing about 18 months after pollination; the fruit is a large acorn, long and 2 cm broad, bicoloured with an orange basal half grading to a green-brown tip; the acorn cup ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pollen
Pollen is a powdery substance produced by seed plants. It consists of pollen grains (highly reduced microgametophytes), which produce male gametes (sperm cells). Pollen grains have a hard coat made of sporopollenin that protects the gametophytes during the process of their movement from the stamens to the pistil of flowering plants, or from the male cone to the female cone of gymnosperms. If pollen lands on a compatible pistil or female cone, it germinates, producing a pollen tube that transfers the sperm to the ovule containing the female gametophyte. Individual pollen grains are small enough to require magnification to see detail. The study of pollen is called palynology and is highly useful in paleoecology, paleontology, archaeology, and forensics. Pollen in plants is used for transferring haploid male genetic material from the anther of a single flower to the stigma of another in cross-pollination. In a case of self-pollination, this process takes place from the anth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Floribunda
''Quercus floribunda'', called the Moru oak or Mohru oak, Tilonj oak and green oak, is a species of oak An oak is a tree or shrub in the genus ''Quercus'' (; Latin "oak tree") of the beech family, Fagaceae. There are approximately 500 extant species of oaks. The common name "oak" also appears in the names of species in related genera, notably ''L ... native to Afghanistan, Pakistan, India's western Himalaya, and Nepal, typically found from above sea level. It is in the subgenus ''Cerris'', section ''Ilex''. An evergreen tree with a dense crown reaching , it is an important fuelwood and fodder species. References {{Taxonbar, from=Q15339679 floribunda Plants described in 1935 Taxa named by Aimée Antoinette Camus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Coccifera
''Quercus coccifera'', the kermes oak, is an oak bush in the ''Ilex'' section of the genus. It is native to the Mediterranean region and Northern African Maghreb, south to north from Morocco to France and west to east from Portugal to Cyprus and Turkey, crossing Spain, Italy, Libya, Balkans, and Greece, including Crete. The Kermes Oak was historically important as the food plant of the '' Kermes'' scale insect, from which a red dye called crimson was obtained. The etymology of the specific name ''coccifera'' is related to the production of red cochineal (crimson) dye and derived from Latin coccum which was from Greek κόκκος, the kermes insect. The Latin -fera means 'bearer'. Description ''Quercus coccifera'' is usually a shrub less than high, rarely a small tree, reaching tall (a specimen recorded in Kouf, Libya) and in trunk diameter. It is evergreen, with spiny-serrated coriaceous leaves 1.5–4 cm long and 1–3 cm broad. The acorns are 2–3 cm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Alnifolia
''Quercus alnifolia'', commonly known as the golden oak, is an evergreen oak species of Cyprus. Its common English name refers to the golden coloured lower surface of its leaves. ''Quercus alnifolia'' belongs to the endemic flora of the island and it is confined to the igneous geological complex of the Troodos Mountains. In February 2006, the parliament of Cyprus selected the golden oak to be the country's national tree. Description The golden oak is a much branched evergreen shrub or small tree up to high. Due to its short stature (in relation to other oaks) it is sometimes referred to as the ''dwarf oak''. Its leaves are simple, obovate to suborbicular, long, 1–7 cm wide, glabrous and shining dark green above and densely golden or brownish tomentose below, with serrate margins and raised nervation. The petioles are strong, long and pilose. The flowers are unisexual; the male catkins are greenish-yellow forming spreading or pendulous clusters at the tips of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stamen
The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filament and an anther which contains ''sporangium, microsporangia''. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle area of the anther. The sterile tissue between the lobes is called the connective, an extension of the filament containing conducting strands. It can be seen as an extension on the dorsal side of the anther. A pollen grain develops from a microspore in the microsporangium and contains the male gametophyte. The stamens in a flower are collectively called the androecium. The androecium can consist of as few as one-half stamen (i.e. a single locule) as in ''Canna (plant), Canna'' species or as many as 3,482 stamens which have been counted in the saguaro (''Carnegiea gigantea'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Claudius Loudon
John Claudius Loudon (8 April 1783 – 14 December 1843) was a Scottish botanist, garden designer and author. He was the first to use the term arboretum in writing to refer to a garden of plants, especially trees, collected for the purpose of scientific study. He was married to Jane, née Webb, a fellow horticulturalist, and author of science-fiction, fantasy, horror, and gothic stories. Early life Loudon was born in Cambuslang, Lanarkshire, Scotland to a respectable farmer. Therefore, as he was growing up, he developed a practical knowledge of plants and farming. As a young man, Loudon studied biology, botany and agriculture at the University of Edinburgh. When working on the layout of farms in South Scotland, he described himself as a landscape planner. This was a time when open field land was being converted from run rig with 'ferm touns' to the landscape of enclosure, which now dominates British agriculture. Loudon developed a limp as a young man, and later became c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Stenophylloides
''Quercus stenophylloides'', also called Arisan oak, is a species of evergreen, broad-leaf tree endemic to Taiwan. Description ''Quercus stenophylloides'' can grow up to 15 m(49 ft) tall, with trunks up to 40 cm(16 in) wide. They have gray branchlets with lenticels. Leaf Leaf shape can range from lanceolate to ovate-oblong, 6 - 14.5 cm(2.4 - 5.7 in) long, 1.2 - 4.2 cm(0.5 - 1.7 in) wide, acuminate at apex, and acute or obtuse at base. They are green on the upside, grayish-white, glaucous or green and hairy beneath. The texture is coriaceous. Echinate-serrate on the edge. Midribs are concave above, elevated beneath. Lateral veins 9 - 17 pairs. Petioles 1 - 2.3 cm(0.4 - 0.9 in) long. Flower Blooming from May to June, the flowers are unisexual and are both small, hairy, growing on the same individual tree. Both are arranged on a stem, only staminate flowers' are a lot longer. Also, staminate flowers are arranged spirally on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Sessilifolia
''Quercus sessilifolia'' is an Asian species of trees in the beech family Fagaceae The Fagaceae are a family of flowering plants that includes beeches, chestnuts and oaks, and comprises eight genera with about 927 species. Fagaceae in temperate regions are mostly deciduous, whereas in the tropics, many species occur as evergre .... It is widespread across Japan, Taiwan, and much of southeastern China (Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangsu, Jiangxi, Sichuan, and Zhejiang provinces). It is placed in subgenus ''Cerris'', section ''Cyclobalanopsis''. ''Quercus sessilifolia'' is a tree up to 25 meters tall. Twigs are waxy. Leaves can be as much as 15 cm long, thick and leathery. References External linksline drawing, Flora of China Illustrations vol. 4, fig. 377, drawings 3 + 4 at upper left sessilifolia Trees of China Trees of Japan Trees of Taiwan Plants described in 1851 {{Quercus-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Miyagii
''Quercus miyagii'' is a species of oak native to the Ryukyu Islands The , also known as the or the , are a chain of Japanese islands that stretch southwest from Kyushu to Taiwan: the Ōsumi, Tokara, Amami, Okinawa, and Sakishima Islands (further divided into the Miyako and Yaeyama Islands), with Yona .... It is placed in subgenus ''Cerris'', section ''Cyclobalanopsis''. A tree typically tall, its acorns are consumed by the freshwater crabs '' Geothelphusa grandiovata'' and '' Candidiopotamon okinawense'', which gather them and store them in their burrows. References {{Taxonbar, from=Q11291842 miyagii Flora of the Ryukyu Islands Plants described in 1912 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus Lamellosa
''Quercus lamellosa'' (syn. ''Cyclobalanopsis lamellosa'') is a species of oak native to the Himalaya and adjoining mountains from Tibet and Nepal east as far as Guangxi and northern Thailand, growing at altitudes of 1300–2500 m. The Lepcha of Sikkim call it . ''Quercus lamellosa'' is a medium-sized to large evergreen tree growing to 40 m tall with a trunk up to 1.5 m diameter. The leaves are spirally arranged, ovate-elliptic, 16–45 cm long and 6–15 cm broad, with a sharply serrated margin. The flowers are catkins, the female flowers maturing into broad acorns 2–3 cm long and 3–4 cm broad, set in a deep cupule with concentric rings of woody scales. Joseph Dalton Hooker commented, :"The present is one of the commonest trees about Dorjiling, and is certainly by far the noblest species of Oak known, whether from the size of the foliage or acorns, the texture and colour, or the imposing appearance of the tree." ''Quercus lamellosa'' is occasionally c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hong Kong
Hong Kong ( (US) or (UK); , ), officially the Hong Kong Special Administrative Region of the People's Republic of China ( abbr. Hong Kong SAR or HKSAR), is a city and special administrative region of China on the eastern Pearl River Delta in South China. With 7.5 million residents of various nationalities in a territory, Hong Kong is one of the most densely populated places in the world. Hong Kong is also a major global financial centre and one of the most developed cities in the world. Hong Kong was established as a colony of the British Empire after the Qing Empire ceded Hong Kong Island from Xin'an County at the end of the First Opium War in 1841 then again in 1842.. The colony expanded to the Kowloon Peninsula in 1860 after the Second Opium War and was further extended when Britain obtained a 99-year lease of the New Territories in 1898... British Hong Kong was occupied by Imperial Japan from 1941 to 1945 during World War II; British administration resume ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
