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Tradescant's American Aster

Symphyotrichum tradescantii (L.) G. L. Nesom

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Associations

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In Great Britain and/or Ireland:
Foodplant / parasite
Golovinomyces orontii parasitises live Aster tradescantii

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Description

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Perennials, 5–70 cm, cespitose; short-rhizomatous. Stems 1–5+, ascending to erect (straight, slender, 1–2.5(–3) mm diam.), glabrous. Leaves thin, margins scab­rous to scabrellous or eciliate, apices mucronulate, faces gla­brous; basal persistent or withering by flowering, petiolate (petioles slightly winged, sheathing), blades spatulate to elliptic or oblanceolate, 10–40 × 5–11 mm, bases cuneate to attenuate, margins crenate-serrate, apices obtuse to acute; proximal cauline persistent or withering by flowering, ± broadly winged-petiolate or sessile, blades oblong, lanceolate or elliptic-lanceolate to oblanceolate, or linear-lanceolate, 20–100 × 3–9 mm, bases attenuate to cuneate, slightly clasping, margins serrulate or entire; distal sessile, blades oblanceolate to linear-lanceolate or linear, 10–60 × 1–7 mm, gradually reduced distally, bases cuneate to tapering, margins serrulate or entire, apices acute to acuminate. Heads {(10–)25–100} in paniculiform arrays, branches ascending (1–10 heads per branch). Peduncles ascending, 0.2–2.5+ cm, glabrous, bracts 1–4, subulate to linear. Involucres cylindro-campanulate, 3.3–4.5(–5) mm. Phyllaries in 4–5 series oblong-lancoelate (outer) to linear-lanceolate (inner) or linear (innermost), unequal, bases indurate 1 / 2 +, margins scarious, erose, hyaline, ciliolate, green zones lanceolate, apices acute to acuminate or caudate, mucronulate or apiculate, sometimes purplish, faces glabous. Ray florets 14–27; corollas white, laminae 4.3–8.2 × 0.7–0.8 mm. Disc florets 20–30; corollas pale yellow becoming purplish, 3–4.1 mm, tubes shorter to nearly equaling funnelform throats, lobes lanceolate, 0.5–1 mm. Cypselae tan (nerves stramineous), obovoid, ± compressed, 3.5–4 mm, 4–5-nerved, faces strigillose; pappi white, 3–3.6 mm. 2n = 16, 32.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 469, 501, 516, 519 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Synonym

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Aster tradescantii Linnaeus, Sp. Pl. 2: 876. 1753 (as tradescanti)
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 469, 501, 516, 519 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Symphyotrichum tradescantii

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Symphyotrichum tradescantii (formerly Aster tradescantii) is a species of flowering plant in the family Asteraceae native to northeastern North America. Common names include Tradescant's aster and shore aster.[3]

Description

Symphyotrichum tradescantii is a perennial, herbaceous plant that may reach 5 to 70 centimeters (2 to 28 inches) tall. Its flowers have white ray florets and pale yellow to purple disk florets.[3]

  • Symphyotrichum tradescantii 91720853.jpg
  • Symphyotrichum tradescantii 91720864.jpg

Distribution and habitat

Native

Symphyotrichum tradescantii is native to northeastern North America in Canada (New Brunswick, Newfoundland, Nova Scotia, and Québec) and the United States (Maine, Massachusetts, New Hampshire, New Jersey, New York, Rhode Island, and Vermont).[2]

Introduced

It is an introduced species in the Czech Republic, Slovakia, Slovenia, and Croatia.[2]

Habitat

S. tradescantii is found in wet and rocky habitats such as shores, streams, and freshwater estuaries.[3]

Citations

References

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Symphyotrichum tradescantii: Brief Summary

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Symphyotrichum tradescantii (formerly Aster tradescantii) is a species of flowering plant in the family Asteraceae native to northeastern North America. Common names include Tradescant's aster and shore aster.

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Aster drobnokwiatowy ( Polish )

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Aster drobnokwiatowy (Symphyotrichum tradescantii (L.) G.L. Nesom) – gatunek byliny należący do rodziny astrowatych. Jako gatunek rodzimy występuje w Ameryce Północnej[2]. W Polsce posiada status kenofita.

Nazewnictwo

Dawniej zaliczany był do rodzaju aster jako Aster tradescantii L. Według nowszych ujęć taksonomicznych przeniesiony został do rodzaju Symphyotrichum i obecnie ma nazwę Symphyotrichum tradescantii (L.) G.L. Nesom[3]. Nie utworzono nowej nazwy polskiej i nadal nazywany jest astrem drobnokwiatowym.

Morfologia

Łodyga
Do 120 cm wysokości, w dolnej części naga.
Liście
Liście łodygowe delikatne, lancetowate, bez uszek u nasady.
Kwiaty
Zebrane w koszyczki o średnicy 12-15 mm, te z kolei zebrane w szczytową wiechę. Kwiaty języczkowe białe. Okrywa wysokości 4-5 mm. Zewnętrzne listki okrywy krótsze od wewnętrznych[4].

Biologia i ekologia

Bylina, hemikryptofit. Rośnie nad rzekami. Kwitnie od sierpnia do listopada. Gatunek charakterystyczny związku Senecion fluviatilis[5]. Liczba chromosomów 2n = 16, 32[6].

Przypisy

  1. ↑ Stevens P.F.: Angiosperm Phylogeny Website (ang.). 2001–. [dostęp 2014-01-24].
  2. ↑ Symphyotrichum tradescantii na Germplasm Resources Information Network (GRIN) [dostęp 2014-01-24].
  3. ↑ Symphyotrichum tradescantii na The Plant List [dostęp 2014-01-24].
  4. ↑ Szafer W., Kulczyński S., Pawłowski B. Rośliny polskie. Państwowe Wydawnictwo Naukowe, Warszawa 1969.
  5. ↑ WładysławW. Matuszkiewicz WładysławW., Przewodnik do oznaczania zbiorowisk roślinnych Polski, Warszawa: Wydawnictwo Naukowe PWN, 2001, ISBN 83-01-13520-4, OCLC 749271059 .
  6. ↑ Symphyotrichum tradescantii na Flora of North America [dostęp 2014-01-24].
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Aster drobnokwiatowy: Brief Summary ( Polish )

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Aster drobnokwiatowy (Symphyotrichum tradescantii (L.) G.L. Nesom) – gatunek byliny należący do rodziny astrowatych. Jako gatunek rodzimy występuje w Ameryce Północnej. W Polsce posiada status kenofita.

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Symphyotrichum tradescantii ( Portuguese )

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Symphyotrichum tradescantii (anteriormente Aster tradescantii) é uma espécie de planta com flor da família Asteraceae nativa do nordeste da América do Norte. Os nomes comuns incluem aster do Tradescant, aster da costa e aster de Tradescant (Francês).[3]

Descrição

Symphyotrichum tradescantii é uma espécie herbácea perene. [3]

Distribuição e habitat

Symphyotrichum tradescantii é nativa do nordeste da América do Norte no Canadá (New Brunswick, Newfoundland, Nova Escócia e Québec) e nos Estados Unidos (Maine, Massachusetts, New Hampshire, New Jersey, New York, Rhode Island e Vermont).[4]

Introduzido

É uma espécie introduzida na República Tcheca, Eslováquia, Eslovénia e Croácia.[4]

Habitat

S. tradescantii é encontrada em habitats húmidos e rochosos, como costas, riachos e estuários de água doce.[3]

Referências

  1. ↑ NatureServe 2021.
  2. ↑ a b c Hassler 2020.
  3. ↑ a b c (em inglês) [http://www.efloras.org/florataxon.aspx?flora_id= 1 &taxon_id= 250067690 Symphyotrichum tradescantii ] em [http://www.efloras.org/flora_page.aspx?flora_id= 1 Flora of North America]
  4. ↑ a b Hassler, M. (2020). «Symphyotrichum tradescantii (L.) G.L. Nesom». Consultado em 19 de janeiro de 2021 – via Species 2000 & ITIS Catalogue of Life, 2020-12-01 (Roskov, Y.; Ower, G.; Orrell, T.; Nicolson, D.; Bailly, N.; Kirk, P.M.; Bourgoin, T.; DeWalt, R.E.; Decock, W.; van Nieukerken, E.J.; Penev, L.; eds.). Digital resource at Catalogue of Life (www.catalogueoflife.org). Species 2000: Naturalis, Leiden, the Netherlands. ISSN 2405-8858
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Symphyotrichum tradescantii: Brief Summary ( Portuguese )

provided by wikipedia PT

Symphyotrichum tradescantii (anteriormente Aster tradescantii) é uma espécie de planta com flor da família Asteraceae nativa do nordeste da América do Norte. Os nomes comuns incluem aster do Tradescant, aster da costa e aster de Tradescant (Francês).

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Symphyotrichum tradescantii ( Vietnamese )

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Symphyotrichum tradescantii là một loài thực vật có hoa trong họ Cúc. Loài này được (L.) G.L.Nesom miêu tả khoa học đầu tiên.[1]

Chú thích

  1. ^ The Plant List (2010). “Symphyotrichum tradescantii”. Truy cập ngày 4 tháng 6 năm 2013.

Liên kết ngoài

src= Wikimedia Commons có thư viện hình ảnh và phương tiện truyền tải về Symphyotrichum tradescantii src= Wikispecies có thông tin sinh học về Symphyotrichum tradescantii


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Symphyotrichum tradescantii: Brief Summary ( Vietnamese )

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Symphyotrichum tradescantii là một loài thực vật có hoa trong họ Cúc. Loài này được (L.) G.L.Nesom miêu tả khoa học đầu tiên.

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