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Bidens laevis

Bidens laevis (L.) Britton Sterns & Poggenb.

Bidens elegans Greene

Bidens nashii Small

Helianthus laevis L.

Bur-marigolds, Sticktights, Smooth Beggartick, Smooth Bidens, Smooth Bur Marigold, Larger Bur Marigold

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassAsteridaeA large class that encompasses asters
OrderAsteralesFlowering plants with a central disk flower and surrounding petals, like daisies
FamilyAsteraceaeThe aster family, which also includes daisies and sunflowers; from the Greek ἀστήρ, “star,” for the star-shaped flowers
GenusBidensFrom Latin bis, “twice,” and dens, “tooth,” for the pair of bristles on the achenes
SpecieslaevisSmooth, free from hairs or roughness

About plant names...

Bur-marigolds are North American natives.

Identification: Plants are 24-36" (60-91 cm) high, rarely up to 6' (1.8 m). They are found in saturated or flooded soils. Leaves are 1½-8" (3.8-20 cm) long, narrow, with coarse teeth. Yellow flowers are 1½-2½" (3.8-6.3 cm) around, with 8 petals. They bloom from July to October. Seeds have barbed tips, which hitchhike on passers-by to find new locations.

Bidens laevis (Bur-marigolds, Sticktights, Smooth Beggartick, Smooth Bidens, Smooth Bur Marigold, Larger Bur Marigold)

From Britton, Nathaniel Lord, and Brown, Addison, An illustrated flora of the northern United States, Canada and the British Possessions, 1913. Courtesy of USDA-NRCS Plants Database.

Online References:

Bidens laevis on Southeastern Flora, the Southeastern U.S. Plant Identification Resource

Bidens laevis on North Carolina Wildflowers, Shrubs, & Trees, by Jeff Pippen

Bidens laevis at the Lady Bird Johnson Wildflower Center

Bidens laevis on Hortipedia

Bidens laevis on CalPhotos

Bidens laevis at the Clemson Cooperative Extension

Bidens laevis on eFloras

Bidens laevis (Bur-marigolds, Sticktights, Smooth Beggartick, Smooth Bidens, Smooth Bur Marigold, Larger Bur Marigold)

9/11/2010 · Nashua River Rail Trail, Groton Center, Groton, MA
≈ 9 × 6" (23 × 15 cm) ID is uncertain

Bidens laevis (Bur-marigolds, Sticktights, Smooth Beggartick, Smooth Bidens, Smooth Bur Marigold, Larger Bur Marigold)

9/10/2010 · Nashua River Rail Trail, Groton Center, Groton, MA
≈ 11 × 7" (27 × 18 cm) ID is uncertain

Bidens laevis (Bur-marigolds, Sticktights, Smooth Beggartick, Smooth Bidens, Smooth Bur Marigold, Larger Bur Marigold)

9/11/2010 · Nashua River Rail Trail, Groton Center, Groton, MA
≈ 21 × 31" (52 × 78 cm) ID is uncertain

Bidens laevis description by Thomas H. Kent, last updated 16 Aug 2013.

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Bidens laevis (Bur-marigolds, Sticktights, Smooth Beggartick, Smooth Bidens, Smooth Bur Marigold, Larger Bur Marigold)

9/10/2010 · Nashua River Rail Trail, Groton Center, Groton, MA
≈ 17 × 12" (44 × 29 cm) ID is uncertain

Bidens laevis (Bur-marigolds, Sticktights, Smooth Beggartick, Smooth Bidens, Smooth Bur Marigold, Larger Bur Marigold)

9/10/2010 · Nashua River Rail Trail, Groton Center, Groton, MA
≈ 3½ × 2½' (1.2 × 0.8 m) ID is uncertain

Bidens laevis (Bur-marigolds, Sticktights, Smooth Beggartick, Smooth Bidens, Smooth Bur Marigold, Larger Bur Marigold)

9/11/2010 · Nashua River Rail Trail, Groton Center, Groton, MA
≈ 5 × 3½" (12 × 9.7 cm) ID is uncertain

Bidens laevis (Bur-marigolds, Sticktights, Smooth Beggartick, Smooth Bidens, Smooth Bur Marigold, Larger Bur Marigold)

9/10/2010 · Nashua River Rail Trail, Groton Center, Groton, MA ID is uncertain

Bidens laevis (Bur-marigolds, Sticktights, Smooth Beggartick, Smooth Bidens, Smooth Bur Marigold, Larger Bur Marigold)

9/10/2010 · Nashua River Rail Trail, Groton Center, Groton, MA
≈ 21 × 14" (52 × 34 cm) ID is uncertain

Bidens laevis (Bur-marigolds, Sticktights, Smooth Beggartick, Smooth Bidens, Smooth Bur Marigold, Larger Bur Marigold)

9/11/2010 · Nashua River Rail Trail, Groton Center, Groton, MA
≈ 5 × 3½" (13 × 9.2 cm) ID is uncertain

Range:

About this map...