Английская Википедия:Bidens beckii

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Bidens beckii, commonly called Beck's water-marigold or simply water marigold[1] is a species of flowering plant in the family Asteraceae. It is native to Canada and the northern United States.[2][3][4]

Description

Bidens beckii is a perennial herb sometimes as much as to 200 cm (80 inches) tall;[5] it grows emerging from stagnant or slow-moving water, the submerged leaves are finely filiform-dissected. The stem typically arises 15 cm above the water and its leaves are simple, oppositely arranged, lanceolate to ovate and serrated and borne directly from the stem with no petiole.[6][7] It produces numerous yellow flower heads containing (10-30) disc florets and (8) ray florets in late summer. The flowers are solitary at the end of the stem and 2–2.5 cm in diameter. Below the flower there are 5-8 hairless bracts which are about half as long as the petals.[6]

Файл:Rural Hours - Beck's Bidens.jpg
Rural Hours - Beck's Bidens

References

Шаблон:Reflist

External links

Шаблон:Commons category-inline

Шаблон:Taxonbar


Шаблон:Coreopsideae-stub

Партнерские ресурсы
Криптовалюты
Магазины
Хостинг
Разное

  1. ↑ Шаблон:PLANTS
  2. ↑ Biota of North America Program 2014 county distribution map
  3. ↑ Scoggan, H. J. 1979. Dicotyledoneae (Loasaceae to Compositae). Part 4. 1117–1711 pp. In Flora of Canada. National Museums of Canada, Ottawa
  4. ↑ Roberts, M. L. 1985. The cytology, biology and systematics of Megalodonta beckii (Compositae). Aquat. Bot. 21: 99–110.
  5. ↑ Шаблон:Cite book
  6. ↑ 6,0 6,1 Шаблон:Cite web
  7. ↑ Flora of North America, Bidens beckii Torr. ex Spreng.
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