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Ageratina paupercula is recognized by its early spring flowering, relatively small and usually narrowly lanceolate and acuminate leaves, relatively small heads in clusters, and relatively small (1.2–1.4 mm versus mostly 2–3 mm in other species), glabrous cypselae.
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Description
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Perennials or subshrubs, to 100 cm. Stems erect, puberulent to glabrate. Leaves opposite; pet-ioles 3–15 mm; blades narrowly to broadly lanceolate, (2–)3–7 × 0.5–1.5 cm, margins coarsely and remotely serrate, apices long-acuminate, abaxial faces sparsely pubescent. Heads clustered. Peduncles 2–6 mm, puberulent. Involucres 2.5–3 mm. Phyllaries: apices acute, abaxial faces puberulent-hispidulous. Corollas white, lobes sparsely hispid-villous. Cypselae glabrous.
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Synonym
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Eupatorium pauperculum A. Gray, Proc. Amer. Acad. Arts 17: 205. 1882
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Ageratina paupercula
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Ageratina paupercula, called the Santa Rita snakeroot, is a North American species of shrubs or perennial herbs in the family Asteraceae. It is found only in the states of Arizona, Sonora, Chihuahua, Durango, Nayarit, and Jalisco.[2][3][4]
Etymology
Ageratina is derived from Greek meaning 'un-aging', in reference to the flowers keeping their color for a long time. This name was used by Dioscorides for a number of different plants.[5]
The epithet paupercula is feminine of pauperculus, Latin for "poor."
The "Santa Rita" part of the common name refers to the Santa Rita Mountains in southern Arizona, south of Tucson, where the species was initially discovered.[6][7]
References
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^ "Ageratina paupercula (A. Gray) R.M. King & H. Rob.". The Global Compositae Checklist (GCC) – via The Plant List. Note that this website has been superseded by World Flora Online
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^ Nesom, Guy L. (2006). "Ageratina paupercula". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 21. New York and Oxford – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
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^ "Ageratina paupercula". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
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^ Turner, B. L. 1997. The Comps of Mexico: A systematic account of the family Asteraceae, vol. 1 – Eupatorieae. Phytologia Memoirs 11: i–iv, 1–272.
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^ Gledhill, David (2008). "The Names of Plants". Cambridge University Press. ISBN 9780521866453 (hardback), ISBN 9780521685535 (paperback). pp 39
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^ United States Department of Agriculture, National Forest Service, Santa Rita Mountains
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^ Gray, Asa 1882. Proceedings of the American Academy of Arts and Sciences 17: 205 as Eupatorium pauperculum
Data related to Ageratina paupercula at Wikispecies
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Ageratina paupercula: Brief Summary
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wikipedia EN tarafından sağlandı
Ageratina paupercula, called the Santa Rita snakeroot, is a North American species of shrubs or perennial herbs in the family Asteraceae. It is found only in the states of Arizona, Sonora, Chihuahua, Durango, Nayarit, and Jalisco.
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Ageratina paupercula
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Ageratina paupercula: Brief Summary
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Vietnamca
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wikipedia VI tarafından sağlandı
Ageratina paupercula là một loài thực vật có hoa trong họ Cúc. Loài này được (A.Gray) R.M.King & H.Rob. mô tả khoa học đầu tiên năm 1970.
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Data related to Ageratina paupercula at Wikispecies 
Bài viết tông cúc Eupatorieae này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. 
