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Flora Of Svalbard
There are over 190 vascular plant species on the Norwegian Arctic archipelago of Svalbard. This figure does not include algae, mosses, and lichens, which are non-vascular plants. For an island so far north, this number of species constitutes an astonishing variety of plant life. Because of the harsh climate and the short growing season, all the plants are slow growing. They seldom grow higher than In some areas, especially in warmer valleys, the plants produce carpets of blossoms. Svalbard has been divided into four vegetation zones. Plant species *'' Achillea millefolium'' L. (introduced) *'' Alchemilla glomerulans'' Buser *'' Alchemilla subcrenata'' Buser (introduced) *'' Alopecurus magellanicus'' Lam. *'' Anthriscus sylvestris'' L. *'' Arabis alpina'' L. – Alpine rock-cress *'' Arctagrostis latifolia'' (R.Br.) Griseb. *'' × Arctodupontia scleroclada'' (Rupr.) Tzvelev *'' Arenaria humifusa'' Wahlenb. *'' Arenaria pseudofrigida'' (Ostenf. & O.C.Dahl) Steffen – fringed s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vascular Plant
Vascular plants (), also called tracheophytes (, ) or collectively tracheophyta (; ), are plants that have lignin, lignified tissues (the xylem) for conducting water and minerals throughout the plant. They also have a specialized non-lignified Tissue (biology), tissue (the phloem) to conduct products of photosynthesis. The group includes most embryophyte, land plants ( accepted known species) excluding mosses. Vascular plants include the clubmosses, Equisetum, horsetails, ferns, gymnosperms (including conifers), and angiosperms (flowering plants). They are contrasted with nonvascular plants such as mosses and green algae. Scientific names for the vascular plants group include Tracheophyta, Tracheobionta and Equisetopsida sensu lato, Equisetopsida ''sensu lato''. Some early land plants (the rhyniophytes) had less developed vascular tissue; the term eutracheophyte has been used for all other vascular plants, including all living ones. Historically, vascular plants were known as "hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alopecurus Magellanicus
''Alopecurus'', or foxtail grass, is a common and widespread genus of plants in the grass family. It is common across temperate and subtropical parts of Eurasia, northern Africa, and the Americas, as well as naturalized in Australia and on various islands. Foxtails can be annual or perennial. They grow in tufts. They have flat leaves and blunt ligules (a small flap at the junction of leaf and stem). Their inflorescence is a dense panicle (a branching head without terminal flower) with 1-flowered spikelets. A few, particularly ''A. myosuroides'', are considered weeds, others are very decorative and are used in bouquets of dried flowers. Species 43 species are accepted. * ''Alopecurus aequalis'' – Orange foxtail, shortawn foxtail – Eurasia, Americas * '' Alopecurus albovii'' – Caucasus * '' Alopecurus alopecuroides'' – Syria and Israel * '' Alopecurus anatolicus'' – eastern Turkey * ''Alopecurus apiatus'' – Kyrgyzstan, Tajikistan, Afghanistan, Iraq, Iran * ''A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cakile Arctica
''Cakile'' is a genus within the flowering plant family Brassicaceae. Species in this genus are commonly known as searockets, though this name on its own is applied particularly to whatever member of the species is native or most common in the region concerned, the European searocket ''Cakile maritima'' in Europe, and the American searocket ''C. edentula'' in North America. The genus is native to Europe, Asia and North America, but the European searocket has been introduced into North America and has spread widely on both east and west coasts; in many places it is replacing the native ''C. edentula'', and is regarded as an undesirable invasive species. ''Cakile'' species grow as annual plants with an erect or decumbent stem. The common species in Europe and North America grow close to the coast, often in dunes. Their leaves are fleshy. Flowers are typically pale mauve to white, with petals about 1 cm in length. Each fruit has two sections, one that remains attached t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botrychium Lunaria
''Botrychium lunaria'' is a species of fern in the family Ophioglossaceae known by the common name moonwort or common moonwort. It is the most widely distributed moonwort, growing throughout the Northern Hemisphere across Eurasia and from Alaska to Greenland, as well as temperate parts of the Southern Hemisphere. Description This is a small plant growing up to in height from an underground caudex. The leaf is pinnate and is divided into a sterile frond and a fertile frond. The sterile frond of the leaf has 4 to 9 pairs of fan-shaped leaflets or pinnae. The fertile part of the leaf is very different in shape, with grapelike clusters of round sporangia producing spores by which it reproduces. As in other members of the family Ophioglossaceae, this species is eusporangiate, the sporangia derived from more than one initial cell and having sporangial walls more than one cell thick. Their spores develop into underground, mycotrophic gametophytes. Moonworts die down at the end of su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botrychium Boreale
''Botrychium boreale'', commonly called northern moonwort, is a species of fern in the family Ophioglossaceae. It has a short, single leaved rhizome In botany and dendrology, a rhizome ( ) is a modified subterranean plant stem that sends out roots and Shoot (botany), shoots from its Node (botany), nodes. Rhizomes are also called creeping rootstalks or just rootstalks. Rhizomes develop from ... that stands upright. Taxonomy ''Botrychium boreale'' was first described in 1857 by Julius Milde, based on material from Norway. References boreale Plants described in 1857 Flora of Greenland {{fern-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Braya Purpurascens
''Braya'' is a genus of plants in the family Brassicaceae. *''Braya alpina'' Sternb. & Hoppe *''Braya fernaldii'' Abbe *''Braya forrestii'' W.W.Sm. *''Braya glabella'' Richardson *''Braya humilis'' (C.A. Mey.) B.L. Rob. *''Braya linearis'' Rouy *''Braya longii'' Fernald *''Braya pilosa'' Hook. *''Braya rosea'' (Turcz.) Bunge *''Braya scharnhorstii'' Regel & Schmalh. *''Braya thorild-wulffii ''Braya thorild-wulffii'', the Greenland northern rockcress, is a plant species native to Greenland, Nunavut the Canadian Northwest Territories, and from the Chukotka Autonomous Okrug of eastern Russia. ''Braya thorild-wulffii'' is an herb up to ...'' Ostenf. References * * External links Brassicaceae genera {{Brassicales-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bistorta Vivipara
''Bistorta vivipara'' (synonym ''Persicaria vivipara'') is a perennial herbaceous flowering plant in the knotweed and buckwheat family Polygonaceae, commonly known as alpine bistort. Scientific synonyms include ''Bistorta vivipara'' and ''Polygonum viviparum''. It is common all over the high Arctic through Europe, North America, incl. Greenland, and temperate and tropical Asia. Its range stretches further south in high mountainous areas such as the Alps, Carpathians, Pyrenees, Caucasus, Alaska and the Tibetan Plateau. Taxonomy Molecular phylogenetic work has demonstrated that the genus ''Bistorta'' represents a distinct lineage within the family Polygonaceae. The genus ''Bistorta'' contains at least 42 accepted species. Description Alpine bistort is a perennial herb that grows to tall. It has a thick rhizomatous rootstock and an erect, unbranched, hairless stem. The leaves are hairless on the upper surfaces, but hairy and greyish-green below. The basal ones are longish-ellipt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Betula Nana
''Betula nana'', the dwarf birch, is a species of birch in the family Betulaceae, found mainly in the tundra of the Arctic region. Description It is a monoecious, deciduous shrub growing up to high. The bark is non-peeling and shiny red-copper colored. The leaves are rounded, diameter, with a bluntly toothed margin. The leaves are a darker green on their upper surface. Leaf growth occurs after snow melt and become red in autumn. The wind-pollinated fruiting catkins are erect, long and broad. Distribution ''Betula nana'' is native to arctic and cool temperate regions of Greenland, Iceland, northern Europe, northern Asia and northern North America and it will grow in a variety of conditions. Outside of far northern areas, it is usually found growing only in mountains above , up to in Great Britain and in the Alps. Its northern range limit is on Svalbard, where it is confined to favourable sites. In the UK ''Betula nana'' is at its southern range limit, with many populatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barbarea Vulgaris
''Barbarea vulgaris'', also called wintercress (usual common name), or alternatively winter rocket, rocketcress, yellow rocketcress, yellow rocket, wound rocket, herb barbara, creases, or creasy greens, is a Biennial plant, biennial herb of the genus ''Barbarea'', belonging to the family Brassicaceae. Description The plant grows to high and wide. The stem is ribbed and hairless, branched at the base. It has basal Rosette (botany), rosettes of shiny, dark green leaves. The basal leaves are stalked and lyre-pinnatifid, that is with a large terminal lobe and smaller lower lobes. The cauline leaves are smaller, ovate, toothed, or lobed. The flowers are borne in spring in dense terminal clusters above the Leaf, foliage. They are long, with four bright yellow petals. The flowering period extends from about April through July. The fruit is a pod around . Chemical substances in this species include saponins, flavonoids, and glucosinolates. It usually has a peppery taste. Taxonomy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arenaria Pseudofrigida
''Arenaria pseudofrigida'' is a species of flowering plant belonging to the family Caryophyllaceae. Its native range is Subarctic The subarctic zone is a region in the Northern Hemisphere immediately south of the true Arctic, north of hemiboreal regions and covering much of Alaska, Canada, Iceland, the north of Fennoscandia, Northwestern Russia, Siberia, and the Cair .... References {{Taxonbar, from=Q2860828 pseudofrigida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arenaria Humifusa
''Arenaria humifusa'' is a species of flowering plant belonging to the family Caryophyllaceae. Its native range is Subarctic The subarctic zone is a region in the Northern Hemisphere immediately south of the true Arctic, north of hemiboreal regions and covering much of Alaska, Canada, Iceland, the north of Fennoscandia, Northwestern Russia, Siberia, and the Cair ... to Northeastern Canada. References {{Taxonbar, from=Q2860830 humifusa Taxa named by Göran Wahlenberg Flora of Northern Canada ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
× Arctodupontia Scleroclada
The multiplication sign (), also known as the times sign or the dimension sign, is a mathematical symbol used to denote the operation of multiplication, which results in a product. The symbol is also used in botany, in botanical hybrid names. The form is properly a four-fold rotationally symmetric saltire. The multiplication sign is similar to a lowercase X (). History The earliest known use of the symbol to indicate multiplication appears in an anonymous appendix to the 1618 edition of John Napier's . This appendix has been attributed to William Oughtred, who used the same symbol in his 1631 algebra text, , stating:Multiplication of species .e. unknownsconnects both proposed magnitudes with the symbol 'in' or : or ordinarily without the symbol if the magnitudes be denoted with one letter. Other works have been identified in which crossed diagonals appear in diagrams involving multiplied numbers, such as Robert Recorde's '' The Ground of Arts'' and Oswald Schreck ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
