NODDING BUR-MARIGOLD

Bidens cernua

Daisy & Dandelion [Asteraceae]

month8jul month8july month8aug month8sep month8sept month8oct

flower
flower8yellow
 		 inner
inner8brown
 		 morph
morph8actino
 		 petals
petalsZ0 petalsZmany
(many)		 stem
stem8round
 

18th Sept 2008, Failsworth, Rochdale Canal. Photo: © RWD
Growing in a partially drained canal bed. Up to 2 feet tall with serrated leaves in opposite pairs. Flowers are mostly without ray florets 9but some speciens do have them, unlike London Bur-Marigold).


18th Sept 2008, Failsworth, Rochdale Canal. Photo: © RWD
Flower heads larger than London Bur-Marigold, and drooping as a result. Stalkless leaves.


18th Sept 2008, Failsworth, Rochdale Canal. Photo: © RWD
Unlike London Bur-Marigold not all flower heads are without rayed florets (but this specimen is).


18th Sept 2008, Failsworth, Rochdale Canal. Photo: © RWD
Leaves toothed like Trifid Bur-Marigold and not untoothed as is London Bur-Marigold.


18th Sept 2008, Failsworth, Rochdale Canal. Photo: © RWD
A single flower head perches atop each branched flowering stem. Behind this are seven to eight long narrow un-toothed bracts whereas in London Bur-Marigold there are about six.


18th Sept 2008, Failsworth, Rochdale Canal. Photo: © RWD
The serrated un-stemmed leaves are in opposite pairs.


18th Sept 2008, Failsworth, Rochdale Canal. Photo: © RWD
The bracts of the heavier nodding flowerheads are splayed backwards and thus upwards.


18th Sept 2008, Failsworth, Rochdale Canal. Photo: © RWD
the disc florets are more numerous than those in London Bur-Marigold. Note the green stripes mostly on the inner yellow bracts.


18th Sept 2008, Failsworth, Rochdale Canal. Photo: © RWD
This specimen has eight long bracts.


18th Sept 2008, Failsworth, Rochdale Canal. Photo: © RWD
Within the inner yellow bracts with green stripes lie the disc florets, which are also striped. Text goes here


18th Sept 2008, Failsworth, Rochdale Canal. Photo: © RWD
The lower leaves have two (or two pairs) of petioles at the stalkless base where leaf meets stem.

Lookee-Likees : London Bur-Marigold but that has leaves without serrations and smaller non-drooping flower heads. Also similar to Trifid Bur-Marigold which does have serrated leaves, but that has lower leaves lobed in threes. Of these three, only Nodding Bur-Marigold might have ray florets on some specimens.

No relation to : Branched Bur-Reed nor with Un-branched Bur-Reed [plants with similar names].

Nodding Bur-Marigold is more common than is London Bur-Marigold and grows beside fresh water, and in the margins of dry ponds, canals and reservoirs.

ANY TEXT GOES HERE

Distribution
family8Daisy & Dandelion family8Asteraceae
BSBI maps
genus8Bidens
Bidens
(Bur-Marigolds)

NODDING BUR-MARIGOLD

Bidens cernua

Daisy & Dandelion [Asteraceae]

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