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Bidens cernua L.

Bidens cernua

Bidens cernua L. var. cernua

Bidens cernua L. var. dentata (Nutt.) B. Boivin

Bidens cernua L. var. elliptica Wiegand

Bidens cernua L. var. integra Wiegand

Bidens cernua L. var. minima (Huds.) Pursh

Bidens cernua L. var. oligodonta Fernald & H. St. John

Bidens cernua L. var. radiata DC.

Bidens glaucescens Greene

Nodding beggartick, bur marigold, nodding bur marigold, sticktight

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
Speciescernua“Nodding” or “hanging,” referring to the flowers

About plant names...

Nodding beggar-ticks, so-called because their relatively large flowers tend to face sideways or nod downwards, are found near shorelines and the edges of wetlands, in sandy or mucky soil.

Plants: Plants can reach 13' (4 m), but are typically a few feet in height.

Leaves: Opposite, and sessile or clasping—leaf bases wrap around the stem. Leaves are 1½-8" (4-20 cm) long × up to 1" (2.5 cm) wide, and simple (unlobed).

Flowers: Composite flowers are 1-2" (2.5-5 cm) across, and have up to 8 petals, though rarely the ray flowers are missing and only the tubular disk flowers are present. The flowers are sideways-facing, rather than upward-facing.

Fruits: Fruits are brown, hard, and triangular in shape, with four barbed spears of roughly equal length called awns, designed to hook onto anything that passes by.

These are similar:

 

Bidens cernua (nodding beggartick, bur marigold, nodding bur marigold, sticktight)

9/16/2020 · Cathance River Nature Preserve Trails, Highland Green, Topsham, ME
≈ 6 × 4" (14 × 10.0 cm)

Bidens cernua (nodding beggartick, bur marigold, nodding bur marigold, sticktight)

9/16/2020 · Cathance River Nature Preserve Trails, Highland Green, Topsham, ME
≈ 6 × 4" (15 × 10 cm)

Bidens cernua (nodding beggartick, bur marigold, nodding bur marigold, sticktight)

9/16/2020 · Cathance River Nature Preserve Trails, Highland Green, Topsham, ME
≈ 4 × 4½" (10 × 11 cm)

  You are here
Bidens cernua

Bidens frondosa

Bidens laevis
Common Name

nodding beggartick

devil’s beggartick

bur-marigolds
Plant Up to 13' (4 m) high, usually less than 3' (91 cm) 12-36" (30-91 cm) high, rarely up to 6' (1.8 m). Stems are square in cross-section, nearly hairless, and light green, reddish green, or purple 24-36" (60-91 cm) high, rarely up to 6' (1.8 m). Plants and flowers tend to look disheveled.
Flowers Composite flowers are 1-2" (2.5-5 cm) across, have up to 8 petals, though rarely the ray flowers are missing and only the tubular disk flowers are present. The flowers are sideways-facing, rather than upward-facing Each composite flower is composed of 20-60 orange-yellow disc florets about ⅜-½" (9.5-12 mm) around, and rarely a few yellow rays, each ¹/₁₆-⅛" (2-3.5 mm) long. They are encompassed in 6-10 phyllaries, like a rosette of small leaves. Flowers occur in groups of 1-12, appearing from late summer to early fall. Yellow flowers are 1½-2½" (3.8-6.3 cm) around, with 8 petals. Each is a composite flower. They bloom from July to October.
Leaves Opposite, and sessile or clasping—leaf bases wrap around the stem. Leaves are 1½-8" (4-20 cm) long × up to 1" (2.5 cm) wide, and simple (unlobed) Lower leaves are odd pinnate clusters on long petioles, in opposite pairs; upper leaves may be alternate. Leaves are up to 3" (7.6 cm) × 1" (2.5 cm), coarsely toothed, deltate or lanceolate. 1½-8" (3.8-20 cm) long, narrow, with coarse (dentate or serrate) teeth. They vary in shape from obovate or elliptic to lanceolate or linear
Fruit Fruits are brown, hard, and triangular in shape, with four barbed spears of roughly equal length called awns The seeds or achenes are shaped like a narrow triangle, with two barbed fork tips that attach to fur or clothes. The seeds are also distributed by the wind. Seeds have barbed tips, which hitchhike on passers-by to find new locations.
Range/ Zones

Habitats Near shorelines and the edges of wetlands, in sandy or mucky soil Moist woods, meadows, thickets, fields, roadsides, railroads, borders of streams, ponds, sloughs, swamps, ditches Saturated or flooded soils
Type Wild Wild Wild
Occurrence   Common  

 

Bidens cernua (nodding beggartick, bur marigold, nodding bur marigold, sticktight)

Online References:

Bidens cernua at Minnesota Wildflowers

Bidens cernua on gobotany.nativeplanttrust.org

Bidens cernua on michiganflora.net

Bidens cernua at the Lady Bird Johnson Wildflower Center

Bidens cernua description by Thomas H. Kent, last updated 18 Sep 2020.

© FloraFinder.org. All rights reserved.


 

Bidens cernua (nodding beggartick, bur marigold, nodding bur marigold, sticktight)

9/16/2020 · Cathance River Nature Preserve Trails, Highland Green, Topsham, ME
≈ 5 × 3½" (12 × 8.7 cm)

Bidens cernua (nodding beggartick, bur marigold, nodding bur marigold, sticktight)

9/16/2020 · Cathance River Nature Preserve Trails, Highland Green, Topsham, ME
≈ 7 × 4" (16 × 11 cm)

Range:

About this map...