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, 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 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]
Media related to
Bidens beckii at Wikimedia Commons