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Species of plant From Wikipedia, the free encyclopedia
Bidens beckii, commonly called Beck's water-marigold or simply water marigold[3] is a species of flowering plant in the family Asteraceae. It is native to Canada and the northern United States.[4][5][6]
| Bidens beckii | |
|---|---|
| |
| 1913 illustration[1] | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Bidens |
| Species: | B. beckii |
| Binomial name | |
| Bidens beckii Torr. ex Spreng. | |
 | |
| Range within North America | |
| Synonyms[2] | |
|
Megalodonta beckii (Torr. ex Spreng.) Greene | |
Bidens beckii is a perennial herb sometimes as much as to 200 cm (80 inches) tall;[7] 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.[8][9] 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.[8]
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