Dig deeper at SERNEC, a consortium of southeastern herbaria.

Some authors lump this within the cosmopolitan species B. tripartita, which usually has 3-lobed leaves. Read more at Vascular Plants of North Carolina.

Closely related to, and sometimes included in, the Eurasian B. tripartita, per Weakley's Flora (2022)

INCLUDED WITHIN PLANTS NATIONAL DATABASE:
Bidens tripartita   FAMILY Asteraceae__

INCLUDED WITHIN Floristic Synthesis of North America. BONAP (Kartesz, 2021)

Bidens tripartita

SYNONYMOUS WITH New England Wildflower Society’s Flora Novae Angliae (Haines, 2011)

Bidens tripartita ssp. comosa

INCLUDED WITHIN Flora of North America north of Mexico, vol. 19-20-21 (2006)

Bidens tripartita

INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-70-003:

Bidens tripartita   FAMILY Asteraceae__

INCLUDED WITHIN Manual of the Southeastern Flora (Small, 1933, 1938)

Bidens comosa

COMMON NAME:
Strawstem Beggarticks

         To see larger pictures, click or hover over the thumbnails.

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_bico3_001_lvd

        

USDA-NRCS PLANTS Database / USDA Wetland flora: Field office illustrated guide    pnd_bico3_006_lvd

        

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Bidens comosa   FAMILY Asteraceae__

INCLUDED WITHIN PLANTS NATIONAL DATABASE:
Bidens tripartita   FAMILY Asteraceae__

INCLUDED WITHIN Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Bidens tripartita

SYNONYMOUS WITH New England Wildflower Society’s Flora Novae Angliae (Haines, 2011)
Bidens tripartita ssp. comosa

INCLUDED WITHIN Flora of North America north of Mexico, vol. 19-20-21
Bidens tripartita

INCLUDED WITHIN VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-70-003:
Bidens tripartita   FAMILY Asteraceae__

INCLUDED WITHIN Manual of the Southeastern Flora (Small, 1933, 1938)
Bidens comosa