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Asters Thesis
''Aster'' is a genus of perennial flowering plants in the family Asteraceae. Its circumscription has been narrowed, and it now encompasses around 170 species, all but one of which are restricted to Eurasia; many species formerly in ''Aster'' are now in other genera of the tribe Astereae. '' Aster amellus'' is the type species of the genus and the family Asteraceae. The name ''Aster'' comes from the Ancient Greek word (''astḗr''), meaning "star", referring to the shape of the flower head. Many species and a variety of hybrids and varieties are popular as garden plants because of their attractive and colourful flowers. 'Aster' species are used as food plants by the larvae of a number of Lepidoptera species—see list of Lepidoptera that feed on ''Aster''. Asters can grow in all hardiness zones. Circumscription The genus ''Aster'' once contained nearly 600 species in Eurasia and North America, but after morphologic and molecular research on the genus during the 1990s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aster Amellus
''Aster amellus'', the European Michaelmas daisy, is a perennial herbaceous plant in the genus ''Aster'' of the family Asteraceae. Etymology The specific name ''amellus'' is first used in the Georgics (Book IV, 271–280), a poem of the Latin poet Publius Vergilius Maro (70 BCE – 19 BCE), but the etymology is obscure and uncertain. The English common name derives from the flowers being in bloom during Michaelmas (the Feast of St. Michael the archangel). Description ''Aster amellus'' reaches on average a height of . The stem is erect and branched, the leaves are dark green. The basal leaves are obovate and petiolated, the cauline ones are alternate and sessile, increasingly narrower and lanceolate. The flowers are lilac. The flowering period extends from July through October. The hermaphroditic flowers are either self-fertilized ( autogamy) or pollinated by insects (entomogamy). The seeds are an achene that ripens in October. Distribution This plant is present on t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morphology (biology)
Morphology is a branch of biology dealing with the study of the form and structure of organisms and their specific structural features. This includes aspects of the outward appearance (shape, structure, colour, pattern, size), i.e. external morphology (or eidonomy), as well as the form and structure of the internal parts like bones and organs, i.e. internal morphology (or anatomy). This is in contrast to physiology, which deals primarily with function. Morphology is a branch of life science dealing with the study of gross structure of an organism or taxon and its component parts. History The etymology of the word "morphology" is from the Ancient Greek (), meaning "form", and (), meaning "word, study, research". While the concept of form in biology, opposed to function, dates back to Aristotle (see Aristotle's biology), the field of morphology was developed by Johann Wolfgang von Goethe (1790) and independently by the German anatomist and physiologist Karl Friedrich Burdach ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michaelmas
Michaelmas ( ; also known as the Feast of Saints Michael, Gabriel, and Raphael, the Feast of the Archangels, or the Feast of Saint Michael and All Angels) is a Christian festival observed in some Western liturgical calendars on 29 September, and on 8 November in the Eastern tradition. Michaelmas has been one of the four quarter days of the English and Irish financial, judicial, and academic year. In Christian angelology, the Archangel Michael is the greatest of all the angels; he is particularly honored for defeating Lucifer in the war in heaven. History In the fifth century, a basilica near Rome was dedicated in honour of Saint Michael the Archangel on 30 September, beginning with celebrations on the eve of that day. 29 September is now kept in honour of Saint Michael and all Angels throughout some western churches. The name Michaelmas comes from a shortening of "Michael's Mass", in the same style as Christmas (Christ's Mass) and Candlemas (Candle Mass, the Mass where tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Callistephus
''Callistephus'' is a monotypic genus of flowering plants in the aster family, Asteraceae, containing the single species ''Callistephus chinensis''. Its common names include China aster and annual aster.Gilman, E. F. and T. Howe''Callistephus chinensis''.Fact Sheet FPS-94. University of Florida IFAS. 1999. It is native to China and Korea.''Callistephus chinensis''. Missouri Botanical Garden. and it is cultivated worldwide as an in s and as a |
Symphyotrichum
''Symphyotrichum'' () is a genus of over 100 species and naturally occurring hybrids of herbaceous annual and perennial plants in the composite family Asteraceae, most which were formerly treated within the genus ''Aster''. The majority are endemic to North America, but several also occur in the West Indies, Central and South America, as well as in eastern Eurasia. Several species have been introduced to Europe as garden specimens, most notably New England aster (''Symphyotrichum novae-angliae'') and New York aster (''Symphyotrichum novi-belgii''). Description Brouillet, et al. wrote: Taxonomy of ''Symphyotrichum'' is difficult. Species are usually heterophyllous, some strongly so. Individuals in the spring, with basal rosettes, often have leaf shapes quite different from those with cauline leaves seen later in the season. Phyllary shape on first- and later-formed heads may differ. Individuals may vary considerably in plant size and array development depending upon growing con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sericocarpus
''Sericocarpus'' is a genus of North American plants in the tribe Astereae within the family Asteraceae The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w .... Whitetop aster is a common name for the genus. ; Species * '' Sericocarpus asteroides'' - United States ( MS AL GA FL SC NC TN KY WV VA MD DE NJ PA OH MI NY CT MA RI VT NH ME) * '' Sericocarpus linifolius'' - United States ( LA MS AL GA SC NC TN KY WV VA MD DE NJ PA OH IN MI NY CT MA RI NH) * '' Sericocarpus oregonensis'' United States ( CA OR WA) * '' Sericocarpus rigidus'' - Canada ( BC), United States ( WA OR) * '' Sericocarpus tortifolius'' - United States ( LA MS AL GA FL SC NC) ; formerly included see '' Eucephalus'' * ''Sericocarpus tomentellus - Eucephalus tomentel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oreostemma
''Oreostemma'' is a genus of flowering plants in the family Asteraceae. Species are found in western North America, with two endemic to California. ; Species * '' Oreostemma alpigenum'' (Tundra aster) — California, Nevada, Oregon, Washington, Idaho, Montana, Wyoming * '' Oreostemma elatum'' (Plumas alpine aster) — Sierra Nevada, California * '' Oreostemma peirsonii'' (Peirson's aster) — endemic to California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ..., in the southern Sierra Nevada. References External links Astereae Flora of the Western United States Asteraceae genera {{Astereae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oligoneuron
''Solidago'' sect. ''Ptarmicoidei'' is a section of flowering plants in the genus ''Solidago''. They are sometimes considered a separate genus: ''Oligoneuron''. Like related species they are known as goldenrods. This section contains seven species of perennial herbs, all native to North America. They are distinguished from other goldenrods by their corymbiform flowerheads, which are flat or rounded in profile and about as broad as tall or broader, for which they are sometimes called flat-topped goldenrods. Species The following seven species are included in ''Solidago'' sect. ''Ptarmicoidei'': *'' Solidago houghtonii'' Torrey & A. Gray – Houghton's goldenrod *'' Solidago nitida'' Torrey & A. Gray – shiny goldenrod *''Solidago ohioensis'' Riddell – Ohio goldenrod *'' Solidago ptarmicoides'' (Torrey & A. Gray) B. Boivin – stiff aster *'' Solidago riddellii'' Frank – Riddell's goldenrod *''Solidago rigida ''Solidago rigida'', known by the common names stiff goldenrod and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ionactis
''Ionactis'', common name stiff-leaved asters or ankle-asters, is a small genus of plants belonging to the family Asteraceae. These aster-like plants are endemic to North America (Canada and the United States).Greene, Edward Lee. 1897. Pittonia 3(17C): 245–246 entirely in English One species is widespread across much of the eastern half of the continent, while two others are rare endemics with very restricted ranges (see below). The generic name, ''Ionactis'', is derived from the Greek words "ion," meaning "violet" and "aktis" meaning "ray." This is in allusion to the ray florets, frequently pale purple in this genus. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eurybia (plant)
''Eurybia'' is a genus of plants in the family Asteraceae that were previously included in the genus ''Aster''. Most species are native to North America, although one is also present in northern Eurasia. There are 23 species in the genus, including 1 natural hybrid. The name was first applied by Alexandre de Cassini in 1820. The name is derived from Ancient Greek (), meaning "wide", and (), meaning "few", perhaps in reference to the small number of relatively wide ray florets. Description All species within the genus are perennials that grow from in height. They have rhizomes which can either be long, slender or short and thick or sometimes cormoid, all of which often become woody. The stems can be ascending to erect and are typically simple, though they are in rare cases they branch proximally, i.e. near the point of attachment. They can be glabrous to more or less densely hairy, and are generally eglandular, meaning they lack glands, though they can sometimes be stip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eucephalus (plant)
''Eucephalus'' is a genus of North American flowering plants in the family Asteraceae. ''Eucephalus'' is a perennial up to 160 cm (64 inches) tall. It has numerous flower heads, some species with both ray disc florets but others with only disc florets. Disc florets are nearly always yellow in the genus, but ray florets can be white, pink, purple, or violet. ; Species * '' Eucephalus breweri'' - California Nevada Oregon * '' Eucephalus elegans'' - Nevada Oregon Idaho Montana Wyoming Utah Colorado * '' Eucephalus engelmannii'' - California Nevada Utah Colorado Idaho Montana Washington British Columbia Alberta * '' Eucephalus glabratus'' - California Oregon * '' Eucephalus glaucescens'' Washington * '' Eucephalus gormanii'' - Oregon * '' Eucephalus ledophyllus'' - California Oregon Washington * '' Eucephalus paucicapitatus'' - Washington British Columbia Alberta * '' Eucephalus tomentellus'' - California Oregon * '' Eucephalus vialis'' - California Oregon O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
