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Bidens cernua Linnaeus. Common name: Nodding Bur-marigold. Phenology: Aug-Oct. Habitat: Marshes, wet meadows, bogs, ditches. Distribution: Circumboreal, south in North America to GA, AL, LA, NM, AZ, and CA.

Origin/Endemic status: Native

Synonymy ⓘ: = Ar, C, FNA21, G, GrPl, GW2, Il, K4, Mi, NE, NY, Ok, Pa, RAB, S, SE1, Tat, Tn, Va, W; < Bidens cernua L. — Oh3; > Bidens cernua L. var. cernua — F, Sherff & Alexander (1955); > Bidens cernua L. var. elliptica Wiegand — F; > Bidens cernua L. var. integra Wiegand — F; > Bidens cernua L. var. minima (Huds.) Pursh — F; > Bidens cernua L. var. oligodonta Fernald & H.St.John — F. Basionym: Bidens cernua L. 1753

Links to other floras: = Bidens cernua - FNA21

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: OBL
  • Eastern Mountains and Piedmont: OBL
  • Great Plains: OBL
  • Midwest: OBL
  • Northcentral & Northeast: OBL

Heliophily ⓘ: 8

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image of plant© Scott Ward | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick source CC-BY | Original Image ⭷
image of plant© Gary P. Fleming
image of plant© Scott Ward | Original Image ⭷
image of plant© Caleb Catto, some rights reserved (CC BY), uploaded by Caleb Catto source CC-BY | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Scott Ward | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷

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Horticultural Information

NCBG trait

Intro: Erect to reclining annual of marshes, wet meadows, bogs, ditches.

Stems: Stems simple or sparingly branched, usually smooth or with short rough hairs.

Leaves: Leaves opposite, sessile or clasping, lance-shaped, 1 1/2-8 in. long, usually coarsely toothed, and smooth.

Inforescence:

Flowers: Composite flowers (heads) on long stalks from upper leaf axils, starting out erect but later nodding; heads 1/2-1 1/2 in. wide, consisting of 6-8 yellow, elliptic ray florets with toothed tips (may be absent) encircling a central disk of yellow, 5-lobed tubular florets. 2 series of bracts, the inner yellow and the outer green and curling backward with age, surround the base of the head.

Fruits: Fruit an achene with 4 (or 2) barbed awns.

Comments:

Height: 1-3 ft.

plant sale text:

bloom table text:

description: Erect to reclining annual of marshes, wet meadows, bogs, ditches.

stems: Stems simple or sparingly branched, usually smooth or with short rough hairs.

leaves: Leaves opposite, sessile or clasping, lance-shaped, 1 1/2-8 in. long, usually coarsely toothed, and smooth.

inflorescence:

flowers: Composite flowers (heads) on long stalks from upper leaf axils, starting out erect but later nodding; heads 1/2-1 1/2 in. wide, consisting of 6-8 yellow, elliptic ray florets with toothed tips (may be absent) encircling a central disk of yellow, 5-lobed tubular florets. 2 series of bracts, the inner yellow and the outer green and curling backward with age, surround the base of the head.

fruits: Fruit an achene with 4 (or 2) barbed awns.

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cultural notes:

germination code:

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