Bidens polylepis Blake

Ozark 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

One of the more attractive species in its genus, Ozark beggar-ticks is native to North America but not to New England. Its bright yellow flowers strongly attract a variety of flower-visiting insects.

Habitat

Anthropogenic (man-made or disturbed habitats), marshes, wetland margins (edges of wetlands)

Characteristics

Habitat
  • terrestrial
  • wetlands
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 lobes, or it has both teeth and lobes
  • the edge of the leaf blade has teeth
Flower type in flower heads
the flower head has tubular disk flowers in the center and ray flowers, these often strap-shaped, around the periphery
Ray flower color
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
40–150 mm
Disk flower number
  • 21-50
  • more than 50
Show All Characteristics
  • Flowers
    Bases of bract appendages
    NA
    Bract cycle number
    there are two main cycles of bracts
    Bract margins
    there are fine hairs along the bract margins
    Bract outer side hair type
    the bracts are hairy, with simple hairs on their outer surface
    Bract outer side hairs
    the bracts are hairy on their outer surfaces
    Bract separation
    • at least some flower heads have bracts connected to one another at or near their bases
    • the bracts appear completely unconnected to one another on all flower heads
    Bract shape
    • the main bracts are lanceolate (widest above the base, then taper narrowly towards the tip)
    • the main bracts are linear (long and very narrow)
    • the main bracts are ovate (egg-shaped)
    Bract spines
    the bracts have no spines
    Bract texture
    • the bracts appear thin, flexible and nearly translucent
    • the bracts have a similar texture to a leaf
    Bracts
    there are at least two distinct forms of bracts in different cycles
    Disk flower color
    yellow
    Disk flower lobe number
    • 3
    • 4
    • 5
    Disk flower number
    • 21-50
    • more than 50
    Disk flower reproductive parts
    the disk flower has both pollen- and seed-producing parts
    Disk flower shape
    the disk flower is tube-shaped (cylindrical), or gradually widening like a funnel
    Disk width
    8–15 mm
    Flower head number
    • each flowering stem has four or more flower heads on it
    • each flowering stem has only one to three flower heads on it
    Flower head outer flowers
    at the outer edge of the flower head, each flower has a single enlarged lobe or strap
    Flower head platform
    the base has papery scales on it
    Flower head position
    each of the flower heads is separate on its own peduncle (stalk), not clustered in groups
    Flower head profile
    • the disk is flat or nearly flat across the top
    • the disk is rounded across the top
    Flower head shape
    • the flower head is hemispherical (like the bottom half of a sphere)
    • the flower head is shaped like a cone with the point up
    Flower type in flower heads
    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
    4–5 mm
    Inflorescence branching (Solidago)
    NA
    Inflorescence shape
    • NA
    • the inflorescence is flat-topped in profile
    Number of bracts at flower head base
    18–29
    Ovary beak
    there is no beak on the ovary
    Ovary cross-section
    the ovary is compressed (flattened)
    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
    Ovary profile
    • in profile, the ovary is roughly egg-shaped, but widest above the middle
    • in profile, the ovary is roughly elliptical (widest in the middle, tapering to both ends)
    Ovary surface
    • the ovary surface has no points, bumps or wrinkles, though it may have lines, ribs or wings
    • the ovary surface is textured with tiny points, bumps or wrinkles
    Ovary wing number
    1-2
    Peduncle hair type
    the hairs on the peduncles are simple (not branched), don’t have glands, and are not woolly
    Peduncle hairs
    the peduncles are hairy
    Peduncle length
    10–50 mm
    Ray flower color
    yellow
    Ray flower reproductive parts
    there are neither carpels nor stamens in the ray flowers
    Ray flowers
    6-10
    Ray length
    10–30 mm
    Reproductive system
    all the flowers on the plant contain both carpels and stamens
    Scale tip
    the scales are blunt, with a terminal notch, or straight across the top
    Smaller bracts at base of bracts
    there is no smaller, outer cycle of bracts
    Style branch number
    the style has two branches
    Width of flower head base
    6–10 mm
  • Fruits or seeds
    Number of pappus parts
    • 0
    • 2
    Ovary beak length
    0 mm
    Ovary length in developed fruit
    5–8 mm
    Ovary width in developed fruit
    2.5–5.2 mm
    Seed hair tuft details
    the pappus hairs are hooked or barbed
    Seed hair tuft length
    0.1–1.5 mm
    Seed hair tuft tips
    the pappus hairs are slender
    Seed hairs uniform
    all the pappus hairs are approximately the same length
    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
    Bract resin
    the bracts have no resin or resin glands
    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
    • the plant is biennial, it appears as either first year (non-reproductive) plants or second year plants with flowers or fruit
    Spines on plant
    the plant has no spines
    Underground organs
    there is a thickened taproot on the plant
  • Leaves
    Final leaf segment width (compound lvs only)
    0.5–12 mm
    Hairs on underside of leaf blade
    • the underside of the leaf is fuzzy or hairy
    • 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 fuzzy or hairy
    • 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 a distinct petiole
    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
    Leaf blade edges
    • the edge of the leaf blade has lobes, or it has both teeth and lobes
    • the edge of the leaf blade has teeth
    Leaf blade flatness
    the leaf is flat (planar) at the edges
    Leaf blade hairs
    the leaf blade has simple hairs with no glands, and not tangled or wooly
    Leaf blade length
    40–150 mm
    Leaf blade shape
    • the leaf blade is ovate (widest below the middle and broadly tapering at both ends)
    • the leaf blade is triangular, with the stalk or attachment point on one of the sides
    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 width
    25–80 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 leaf stalks
    Leaf stalk length
    5–30 mm
    Leaf tip extension
    NA
    Leaf type
    leaves are simple (i.e., lobed or unlobed but not separated into leaflets)
    Specific leaf type
    • the leaf has a row of two or more lobes on each side of the central axis
    • the leaf has a row of two or more lobes on each side of the central axis, and each lobe itself has rows of lobes on each side of the lobe's central axis
    • the leaf has lobes that themselves have lobes, and these secondary lobes also have lobes; there may be more than three levels of lobes
  • Place
    Habitat
    • terrestrial
    • wetlands
    Specific habitat
    • edges of wetlands
    • man-made or disturbed habitats
    • marshes
  • Stem, shoot, branch
    Flowering stem cross-section
    the flowering stem is circular, or with lots of small angles
    Leaves on stem
    there is at least one full leaf above the base of the flowering stem
    Stem internode hair direction
    • NA
    • the hairs point mostly upwards to outwards
    Stem internode hair length
    At least 0 mm
    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

Wetland Status

Not classified

New England Distribution and Conservation Status

Distribution

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

Conservation Status

None

Native to North America?

Yes and no (some introduced)

Sometimes Confused With

Bidens aristosa:
capitula with 8-12 outer, herbaceous involucral bracts that measure mostly 5-7 mm long, and with the inner non-herbaceous involucral bracts eciliate or ciliate on the margin (vs. B. polylepis, with capitula with 12-21 outer, herbaceous involucral bracts that measure mostly 8-12 mm long, and with the inner, non-herbaceous involucral bracts coarsely ciliate on the margin).
Bidens trichosperma:
body of cypsela narrow-oblanceolate to cuneate-oblong in outline, 2.5-4 times as long as wide, 0.9-2.5 mm wide, and antrorsely ciliate on the margin, and peduncles glabrous (vs. B. polylepis, with body of cypsela obovate to elliptic-obovate in outline, mostly 1.5-2 times as long as wide, 2.5-5.2 mm wide, and antrorsely ciliate and often erose-notched on the margin, and peduncles pubescent).

Synonyms

  • Bidens involucrata (Nutt.) Britt.
  • Bidens polylepis Blake var. retrorsa Sherff
  • Coreopsis involucrata Nutt.

Family

Asteraceae

Genus

Bidens

Need Help?

Get Help

Information from Dichotomous Key of Flora Novae Angliae

13.  Bidens polylepis Blake E

Ozark beggar-ticks. Bidens involucrata (Nutt.) Britt.; Bidens polylepis Blake var. retrorsa 
 Sherff; Coreopsis involucrata Nutt. • MA, RI. Hydric soil of marshes, wetland margins, and open rights-of-way.