Anthemis arvensis L.

corn chamomile

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New England Distribution

Adapted from BONAP data

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North America Distribution

Adapted from BONAP data

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Facts About

Corn chamomile is native to Europe and was introduced to North America in the late 19th century. It is a weed of crops and pasture, and can form dense stands that exclude other vegetation. Corn chamomile produces abundant seeds that can persist in the soil for a decade or longer.

Habitat

Anthropogenic (man-made or disturbed habitats), meadows and fields

Characteristics

Habitat
terrestrial
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
alternate: there is one leaf per node along the stem
Leaf blade edges
the edge of the leaf blade has lobes, or it has both teeth and lobes
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
  • pink to red
  • white
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
15–35 mm
Flower head width
Up to 40 mm
Disk flower number
more than 50
Show All Characteristics
  • Flowers
    Bases of bract appendages
    NA
    Bract cycle number
    • there are three or more cycles of bracts
    • there are two main cycles of bracts
    Bract outer side hair type
    • the bracts are hairy on their outer surfaces, with curled, tangled, matted, or woolly hairs
    • 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
    the bracts appear completely unconnected to one another on all flower heads
    Bract shape
    • the main bracts are oblong (roughly rectangular but rounded at the ends)
    • the main bracts are obovate (roughly egg-shaped, but widest near the tip)
    Bract spines
    the bracts have no spines
    Bract texture
    the bracts appear thin, flexible and nearly translucent
    Bract tip color
    the tips are a different color from the center of the bract
    Bract tip orientation
    the bracts are pressed against the plant, or spreading out at the tips
    Bract tip shape
    the tips of the bracts are obtuse (have a blunt point)
    Bracts
    the bracts in separate cycles are similar or gradually changing from the outer to inner cycles
    Disk flower color
    • blue to purple
    • yellow
    Disk flower lobe number
    5
    Disk flower number
    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
    5–10 mm
    Flower head number
    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 conical 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 sides of the flower head are roughly parallel, like a cylinder
    Flower head width
    Up to 40 mm
    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
    Inflorescence branching (Solidago)
    NA
    Inflorescence shape
    NA
    Inflorescence stem
    hairs are present on the stem of the inflorescence
    Number of bracts at flower head base
    21–35
    Ovary beak
    there is no beak on the ovary
    Ovary cross-section
    • the ovary has five or more corners in cross-section
    • the ovary is compressed (flattened)
    • the ovary is roughly square or with four corners
    Ovary hair type
    the ovary has no hairs on it
    Ovary hairs
    the ovary has no hairs on it
    Ovary lines or ribs
    • there are four to six lines or ribs visible on the ovary
    • there are no lines or ribs visible on the ovary
    • there are seven to nine ribs visible on the ovary
    • there are ten or more ribs visible on the ovary
    • there are three lines or ribs visible on the ovary
    • there are two lines or ribs visible on the ovary
    • there is one line or rib visible on the ovary
    Ovary profile
    • in profile, the ovary is another shape
    • in profile, the ovary is roughly egg-shaped, but widest above the middle
    Ovary surface
    the ovary surface has no points, bumps or wrinkles, though it may have lines, ribs or wings
    Peduncle hair type
    • NA
    • the hairs on the peduncles are simple (not branched), don’t have glands, and are not woolly
    Peduncle hairs
    • the peduncles are hairy
    • the peduncles have no hairs
    Peduncle length
    40–150 mm
    Ray flower color
    • pink to red
    • white
    Ray flower reproductive parts
    the ray flowers have carpels or stamens, but not both
    Ray flowers
    • 1-5
    • 11-15
    • 16-25
    • 6-10
    Ray length
    5–15 mm
    Reproductive system
    some of the flowers on the plant have only carpels or stamens, while others have both carpels and stamens
    Scale tip
    the scales are acuminate (taper to a very narrow point) or aristate (tipped with a slender bristle)
    Smaller bracts at base of bracts
    there is no smaller, outer cycle of bracts
    Style branch number
    the style has two branches
    Style branches
    the style branch is wider at the tip and has a flattened end, or the style branches are wider at the tips and have flattened ends
    Swelling at base of flower head
    NA
    Width of flower head base
    6–13 mm
  • Fruits or seeds
    Number of pappus parts
    • 0
    • 1
    Ovary length in developed fruit
    1.7–2 mm
    Seed hair tuft bases
    NA
    Seed hair tuft color
    NA
    Seed hair tuft details
    NA
    Seed hair tuft length
    0 mm
    Seed hair tuft tips
    NA
    Seed hairs uniform
    NA
    Seed tuft scale number
    0
    Seed tuft type
    • the pappus is made of a circle or rim of lobes or teeth on the ovary
    • there is no pappus on the ovary
    Top of disk flower ovary
    NA
    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
  • Leaves
    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
    alternate: there is one leaf per node along the stem
    Leaf blade base
    • the leaf has a distinct petiole
    • the leaf has no 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
    Leaf blade hairs
    • the leaf blade has simple hairs with no glands, and not tangled or wooly
    • the leaf blade has tangled or woolly-looking hairs
    Leaf blade length
    15–35 mm
    Leaf blade shape
    • the leaf blade is oblong (rectangular but with rounded ends)
    • the leaf blade is obovate (egg-shaped, but with the widest point above the middle of the leaf blade)
    Leaf blade tip
    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
    8–16 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 length
    At least 0 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
  • Place
    Habitat
    terrestrial
    New England state
    • Connecticut
    • Maine
    • Massachusetts
    • New Hampshire
    • Rhode Island
    • Vermont
    Specific habitat
    • man-made or disturbed habitats
    • meadows or fields
  • Scent
    Plant odor
    the plant does not have much of an odor
  • Stem, shoot, branch
    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 direction
    • the hairs are pressed flat against the plant, pointing either towards the plant's tip or towards it's base
    • the hairs point mostly upwards to outwards
    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

Not classified

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
unranked (S-rank: SNR)

var. agrestis

Massachusetts
unranked (S-rank: SNR)

var. arvensis

Massachusetts
unranked (S-rank: SNR)

Native to North America?

No

Sometimes Confused With

Anthemis cotula:
receptacle with chaff only near the middle of the disk, ray flowers staminate or neutral, and plants ill scented (vs. A. arvensis, with the receptacle with chaff throughout the disk, ray flowers carpellate, and plants not ill scented).

Synonyms

  • Anthemis arvensis L. var. agrestis (Wallr.) DC.

Family

Asteraceae

Genus

Anthemis

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Information from Dichotomous Key of Flora Novae Angliae

1.  Anthemis arvensis L. E

corn chamomile. Anthemis arvensis L. var. agrestis (Wallr.) DC. • CT, MA, ME, NH, RI, VT. Fields, roadsides, disturbed soil.