Bidens cernua L.

nodding beggar-ticks

Copyright: various copyright holders. To reuse an image, please click it to see who you will need to contact.

New England Distribution

Adapted from BONAP data

Found this plant? Take a photo and post a sighting.

North America Distribution

Adapted from BONAP data

enlarge

Facts About

Nodding beggars-ticks is an annual of shorelines and the edges of pools and wetlands. As the name suggests, the plant has large flower heads that tend to droop downwards as it ages. The achenes have four barbed awns that are effective at attaching to clothes.

Habitat

Shores of rivers or lakes, wetland margins (edges of wetlands)

Characteristics

Habitat
  • terrestrial
  • wetlands
New England state
  • Connecticut
  • Maine
  • Massachusetts
  • New Hampshire
  • Rhode Island
  • Vermont
Leaf type
leaves are simple (i.e., lobed or unlobed but not separated into leaflets)
Leaf arrangement
opposite: there are two leaves per node along the stem
Leaf blade edges
  • the edge of the leaf blade has no teeth or lobes
  • the edge of the leaf blade has teeth
Flower type in flower heads
  • the flower head has disk flowers only, and lacks the strap-shaped flowers
  • the flower head has tubular disk flowers in the center and ray flowers, these often strap-shaped, around the periphery
Ray flower color
  • NA
  • orange
  • yellow
Tuft or plume on fruit
there is no plume, or the plume is made up of scales, awns, a crown, or a rim
Spines on plant
the plant has no spines
Leaf blade length
40–200 mm
Flower head width
12–25 mm
Disk flower number
  • 11-20
  • 21-50
  • 6-10
  • more than 50
Show All Characteristics
  • Flowers
    Bases of bract appendages
    NA
    Bract color
    the bracts are not colored or tinged with pink, red or purple
    Bract cycle number
    there are two main cycles of bracts
    Bract shape
    • the main bracts are lanceolate (widest above the base, then taper narrowly towards the tip)
    • the main bracts are ovate (egg-shaped)
    Bracts
    there are at least two distinct forms of bracts in different cycles
    Disk flower color
    • orange
    • yellow
    Disk flower lobe number
    5
    Disk flower number
    • 11-20
    • 21-50
    • 6-10
    • more than 50
    Disk flower reproductive parts
    the disk flower has both pollen- and seed-producing parts
    Disk flower shape
    the disk flower is abruptly widened at some point below the lobes
    Disk width
    12–25 mm
    Flower head outer flowers
    • at the outer edge of the flower head, each flower has a single enlarged lobe or strap
    • at the outer edge of the flower head, the flowers have no enlarged lobe or strap, and are of similar size as those in the center of the disk
    Flower head platform
    the base has papery scales on it
    Flower head shape
    the flower head is hemispherical (like the bottom half of a sphere)
    Flower head width
    12–25 mm
    Flower type in flower heads
    • the flower head has disk flowers only, and lacks the strap-shaped flowers
    • the flower head has tubular disk flowers in the center and ray flowers, these often strap-shaped, around the periphery
    Height of flower head base
    3–10 mm
    Inflorescence branching (Solidago)
    NA
    Inflorescence shape
    the inflorescence is flat-topped in profile
    Number of bracts at flower head base
    6–8
    Ovary cross-section
    • the ovary is compressed (flattened)
    • the ovary is roughly square or with four corners
    Ovary hair type
    • the ovary has hairs on it, but the hairs have no glands
    • the ovary has no hairs on it
    Ovary hairs
    • the ovary has hairs on it
    • the ovary has no hairs on it
    Peduncle length
    10–100 mm
    Peduncle orientation
    the flower heads are held upright, or slightly angled outwards
    Ray flower color
    • NA
    • orange
    • yellow
    Ray flower reproductive parts
    • NA
    • the ray flowers have carpels or stamens, but not both
    Ray flowers
    • 0
    • 6-10
    Ray length
    0–18 mm
    Smaller bracts at base of bracts
    there is a cycle of much smaller bracts outside the cycle of larger and longer bracts
    Width of flower head base
    8–20 mm
  • Fruits or seeds
    Number of pappus parts
    • 2
    • 3
    • 4
    Ovary length in developed fruit
    3–8 mm
    Seed hair tuft bases
    NA
    Seed hair tuft color
    NA
    Seed hair tuft details
    NA
    Seed hair tuft length
    1–4 mm
    Seed hair tuft tips
    NA
    Seed hairs uniform
    NA
    Seed tuft scale number
    0
    Seed tuft type
    the pappus is made of stiff, tapering bristles
    Top of disk flower ovary
    the top of the ovary in fruit is flattened
    Tuft or plume on fruit
    there is no plume, or the plume is made up of scales, awns, a crown, or a rim
  • Glands or sap
    Leaf blade glands
    the leaf blades have no glandular (translucent) dots or scales
    Sap
    the sap is clear and watery
  • Growth form
    Growth form
    the plant has one or more free-standing stems
    Plant lifespan
    the plant is annual, it lacks evidence of previous years' growth
    Spines on plant
    the plant has no spines
    Underground organs
    there are only slender roots on the plant
  • Leaves
    Final leaf segment length (compound lvs only)
    0 mm
    Final leaf segment width (compound lvs only)
    0 mm
    Hairs on underside of leaf blade
    the underside of the leaf is not hairy, or has very few hairs
    Hairs on upper side of leaf blade
    the upper side of the leaf is not hairy, or has very few hairs
    Leaf arrangement
    opposite: there are two leaves per node along the stem
    Leaf blade base
    • the leaf has no petiole
    • the leaf has no petiole and at the base it clasps the stem, or goes all the way around the stem so the stem appears to pierce the leaf
    Leaf blade base shape
    • the base of the leaf blade is cuneate (wedge-shaped, tapers to the base with relatively straight, converging edges), or narrow
    • the base of the leaf blade is rounded
    Leaf blade bloom
    • the underside of the leaf has no noticeable bloom
    • there is a noticeable powdery or waxy bloom on the underside of the leaf
    Leaf blade edges
    • the edge of the leaf blade has no teeth or lobes
    • the edge of the leaf blade has teeth
    Leaf blade hairs
    NA
    Leaf blade length
    40–200 mm
    Leaf blade shape
    • the leaf blade is lanceolate (lance-shaped; widest below the middle and tapering at both ends)
    • the leaf blade is linear (very narrow with more or less parallel sides)
    • the leaf blade is oblanceolate (lance-shaped, but with the widest point above the middle of the leaf blade)
    • the leaf blade is ovate (widest below the middle and broadly tapering at both ends)
    Leaf blade surface colors
    there is no noticeable color variation on the upper surface of the leaf
    Leaf blade tip
    • the tip of the leaf blade is acuminate (tapers to a long, thin point)
    • the tip of the leaf blade is acute (sharply pointed)
    Leaf blade veins
    the leaf blade has one main vein running from the base towards the tip
    Leaf blade width
    2–45 mm
    Leaf disposition
    the leaves are nearly similar in size, prominence of teeth, and length of stalks throughout the stem
    Leaf spines
    there are no spines on the leaf edges
    Leaf stalk
    the leaves have no leaf stalks, but attach directly to the stem
    Leaf stalk length
    0 mm
    Leaf tip extension
    NA
    Leaf type
    leaves are simple (i.e., lobed or unlobed but not separated into leaflets)
    Leaflet number
    0
    Specific leaf type
    the leaves are simple (i.e., lobed or unlobed but not separated into leaflets
    Teeth per side of leaf blade
    At least 0
  • Place
    Habitat
    • terrestrial
    • wetlands
    New England state
    • Connecticut
    • Maine
    • Massachusetts
    • New Hampshire
    • Rhode Island
    • Vermont
    Specific habitat
    • edges of wetlands
    • shores of rivers or lakes
  • Scent
    Plant odor
    the plant does not have much of an odor
  • Stem, shoot, branch
    Flowering stem cross-section
    • the flowering stem is circular, or with lots of small angles
    • the flowering stem is roughly square
    Leaves on stem
    there is at least one full leaf above the base of the flowering stem
    Stem bloom
    there is no powdery or waxy film on the stem
    Stem internode hair type
    • the hairs on the stem are plain, without glands or branches, and not tangled
    • the stem has no hairs between the nodes
    Stem internode hairs
    • the stem has hairs between the nodes
    • the stem has no hairs between the nodes
    Stem wings
    the stem does not have wings on it

Wetland Status

Occurs only in wetlands. (Wetland indicator code: OBL)

New England Distribution and Conservation Status

Distribution

Connecticut
present
Maine
present
Massachusetts
present
New Hampshire
present
Rhode Island
present
Vermont
present

Conservation Status

Exact status definitions can vary from state to state. For details, please check with your state.

Massachusetts
widespread (S-rank: S5)

Native to North America?

Yes

Sometimes Confused With

Bidens hyperborea:
outer, herbaceous involucral bracts ascending to erect, disk corollas usually 4-lobed, and capitula erect (vs. B. cernua, with the outer, herbaceous involucral bracts spreading, disk corollas usually 5-lobed, and capitula arched or nodding in age).
Bidens laevis:
flower heads with rays 15-30 mm long and chaff between disk flowers yellow-orange to orange-red near apex (vs. B. cernua, with flower heads without rays or these mostly 2-15 mm long and chaff between disk flowers yellow near apex).

Synonyms

  • Bidens cernua var. dentata (Nutt.) Boivin
  • Bidens cernua var. elliptica Wieg.
  • Bidens cernua var. integra Wieg.
  • Bidens cernua var. minima (Huds.) Pursh
  • Bidens cernua var. oligodonta Fern. & St. John

Family

Asteraceae

Genus

Bidens

Need Help?

Get Help

Information from Dichotomous Key of Flora Novae Angliae

5.  Bidens cernua L. N

nodding beggar-ticks. Bidens cernua L. var. dentata (Nutt.) Boivin; B. cernua L. var. elliptica Wieg.; B. cernua L. var. integra Wieg.; B. cernua L. var. minima (Huds.) Pursh; B. cernua L. var. oligodonta Fern. & St. John • CT, MA, ME, NH, RI, VT. Shorelines, wetland edges, margins of pools and beaver flowages.