|
Pyrus Nivalis
''Pyrus nivalis'', commonly known as yellow pear, is a species of tree in the family Rosaceae that grows naturally from South-East Europe to Western Asia. Like most pears, its fruit can be eaten raw or cooked; it has a mild sour taste. The plant is very colorful and may grow up to 10 meters tall and 8 meters wide. It is a very hardy plant that is able to survive with a small supply of water and can brave very high/low temperatures. It may hybridize with other pears, producing, for example, ''Pyrus austriaca'' in a cross with ''Pyrus pyraster ''Pyrus pyraster'' ( syn. ''Pyrus communis subsp. pyraster''), also called European wild pear, is a species of pear of the family Rosaceae. This wild pear and ''Pyrus caucasica'' (syn. ''P. communis'' subsp. ''caucasica'') are thought to be the ...''. References External linksInformation from Plants for a Future database [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nikolaus Joseph Von Jacquin
Nikolaus Joseph Freiherr von Jacquin (16 February 172726 October 1817) was a scientist who studied medicine, chemistry and botany. Biography Born in Leiden in the Netherlands, he studied medicine at Leiden University, then moved first to Paris and afterward to Vienna. In 1752, he studied under Gerard van Swieten in Vienna. Between 1755 and 1759, Jacquin was sent to the West Indies, Central America, Venezuela and New Granada by Francis I to collect plants for the Schönbrunn Palace, and amassed a large collection of animal, plant and mineral samples. In 1797, Alexander von Humboldt profited from studying these collections and conversing with Jacquin in preparation of his own journey to the Americas. In 1763, Jacquin became professor of chemistry and mineralogy at the Bergakademie Schemnitz (now Banská Štiavnica in Slovakia). In 1768, he was appointed Professor of Botany and Chemistry and became director of the botanical gardens of the University of Vienna. For his work ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (botany)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rosaceae
Rosaceae (), the rose family, is a medium-sized family of flowering plants that includes 4,828 known species in 91 genera. The name is derived from the type genus ''Rosa''. Among the most species-rich genera are ''Alchemilla'' (270), ''Sorbus'' (260), '' Crataegus'' (260), ''Cotoneaster'' (260), ''Rubus'' (250), and ''Prunus'' (200), which contains the plums, cherries, peaches, apricots, and almonds. However, all of these numbers should be seen as estimates—much taxonomic work remains. The family Rosaceae includes herbs, shrubs, and trees. Most species are deciduous, but some are evergreen. They have a worldwide range but are most diverse in the Northern Hemisphere. Many economically important products come from the Rosaceae, including various edible fruits, such as apples, pears, quinces, apricots, plums, cherries, peaches, raspberries, blackberries, loquats, strawberries, rose hips, hawthorns, and almonds. The family also includes popular ornamental trees and shrubs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrus Austriaca
''Pyrus austriaca'', the Austrian pear, is a species of flowering plant in the genus ''Pyrus'' found in central and southern Europe, and Turkey. They are very large trees for pears, reaching 20m. It is thought to be a hybrid species of ''Pyrus pyraster ''Pyrus pyraster'' ( syn. ''Pyrus communis subsp. pyraster''), also called European wild pear, is a species of pear of the family Rosaceae. This wild pear and ''Pyrus caucasica'' (syn. ''P. communis'' subsp. ''caucasica'') are thought to be the ...'' (European wild pear) and '' Pyrus nivalis'' (snow pear or yellow pear). References austriaca Plants described in 1896 {{Pyrus-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrus Pyraster
''Pyrus pyraster'' ( syn. ''Pyrus communis subsp. pyraster''), also called European wild pear, is a species of pear of the family Rosaceae. This wild pear and ''Pyrus caucasica'' (syn. ''P. communis'' subsp. ''caucasica'') are thought to be the ancestors of the cultivated European pear (''Pyrus communis'' subsp. ''communis''). Both the wild pears are interfertile with domesticated pears. It is sometimes difficult to distinguish ''Pyrus pyraster'' from a common pear. ''Pyrus pyraster'' can reach an age of 100 to 150 years. Description ''Pyrus pyraster'' is a deciduous plant reaching in height as medium-sized shrub and as a tree.Pignatti S. - Flora d'Italia – Edagricole – 1982. Vol. I, pag. 603 Unlike the cultivated form the branches have thorns. The leaves are ovate with serrated margins. The flowers have white petals. The stamens are equal to the length of styles. The flowering period extends from April through May. The fruits reach in diameter and ripen in late s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrus Nivalis Flower
Pears are fruits produced and consumed around the world, growing on a tree and harvested in the Northern Hemisphere in late summer into October. The pear tree and shrub are a species of genus ''Pyrus'' , in the family Rosaceae, bearing the pomaceous fruit of the same name. Several species of pears are valued for their edible fruit and juices, while others are cultivated as trees. The tree is medium-sized and native to coastal and mildly temperate regions of Europe, North Africa, and Asia. Pear wood is one of the preferred materials in the manufacture of high-quality woodwind instruments and furniture. About 3,000 known varieties of pears are grown worldwide, which vary in both shape and taste. The fruit is consumed fresh, canned, as juice, or dried. Etymology The word ''pear'' is probably from Germanic ''pera'' as a loanword of Vulgar Latin ''pira'', the plural of ''pirum'', akin to Greek ''apios'' (from Mycenaean ''ápisos''), of Semitic origin (''pirâ''), meaning "frui ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pears
Pears are fruits produced and consumed around the world, growing on a tree and harvested in the Northern Hemisphere in late summer into October. The pear tree and shrub are a species of genus ''Pyrus'' , in the family Rosaceae, bearing the pomaceous fruit of the same name. Several species of pears are valued for their edible fruit and juices, while others are cultivated as trees. The tree is medium-sized and native to coastal and mildly temperate regions of Europe, North Africa, and Asia. Pear wood is one of the preferred materials in the manufacture of high-quality woodwind instruments and furniture. About 3,000 known varieties of pears are grown worldwide, which vary in both shape and taste. The fruit is consumed fresh, canned, as juice, or dried. Etymology The word ''pear'' is probably from Germanic ''pera'' as a loanword of Vulgar Latin ''pira'', the plural of ''pirum'', akin to Greek ''apios'' (from Mycenaean ''ápisos''), of Semitic origin (''pirâ''), meaning "fruit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
