Tripleurospermum inodorum (L.) Schultz-Bip.

corn scentless-chamomile

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

Corn scentless-chamomile, native to Europe and Central Asia, is introduced in North America and quite invasive in some areas. Like many other weeds of cultivated land, it is variable in size and habit.

Habitat

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

Characteristics

Habitat
terrestrial
New England state
  • Connecticut
  • Maine
  • Massachusetts
  • New Hampshire
Leaf type
  • leaves are compound (made up of two or more discrete leaflets)
  • 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
20–80 mm
Flower head width
30–40 mm
Show All Characteristics
  • Flowers
    Bases of bract appendages
    NA
    Bract outer side hair type
    the bracts are not hairy on their outer surface
    Bract outer side hairs
    the bracts are not hairy on their outer surfaces
    Bract shape
    the main bracts are oblong (roughly rectangular but rounded at the ends)
    Bract tip color
    the tips are a different color from the center of the bract
    Bract width
    0.1–0.2
    Disk flower color
    • green to brown
    • yellow
    Disk flower lobe number
    5
    Disk flower reproductive parts
    the disk flower has both pollen- and seed-producing parts
    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 profile
    the disk is rounded across the top
    Flower head width
    30–40 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
    the inflorescence is flat-topped in profile
    Ovary attachment
    the ovary is attached at or near the base
    Ovary cross-section
    the ovary is compressed (flattened)
    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 three lines or ribs visible on the ovary
    Ovary surface
    the ovary surface is textured with tiny points, bumps or wrinkles
    Ray flower color
    • pink to red
    • white
    Ray flower reproductive parts
    the ray flowers have carpels or stamens, but not both
    Ray flowers
    • 11-15
    • 16-25
    • 6-10
    Ray length
    10–20 mm
    Reproductive system
    some of the flowers on the plant have only carpels or stamens, while others have both carpels and stamens
    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
  • Fruits or seeds
    Number of pappus parts
    0
    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
    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
    Ovary glands
    there are glands on the ovary surface
    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
    • the plant is perennial, it shows evidence of previous year's leaves, stems or stem bases
    Spines on plant
    the plant has no spines
    Underground organs
    there is a thickened taproot on the plant
  • Leaves
    Final leaf segment length (compound lvs only)
    4–20 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
    Leaf arrangement
    alternate: there is one leaf per node along the stem
    Leaf blade base
    the leaf has no petiole
    Leaf blade edges
    the edge of the leaf blade has lobes, or it has both teeth and lobes
    Leaf blade length
    20–80 mm
    Leaf blade shape
    the leaf blade is filiform (extremely narrow, thread-like)
    Leaf blade surface colors
    there is no noticeable color variation on the upper surface of the leaf
    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 tip extension
    NA
    Leaf type
    • leaves are compound (made up of two or more discrete leaflets)
    • leaves are simple (i.e., lobed or unlobed but not separated into leaflets)
  • Place
    Habitat
    terrestrial
    New England state
    • Connecticut
    • Maine
    • Massachusetts
    • New Hampshire
    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
    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 bloom
    • the stem has a powdery or waxy film on it that can be rubbed away
    • there is no powdery or waxy film on the stem
    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
absent
Vermont
absent

Conservation Status

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

Massachusetts
unranked (S-rank: SNR)

Native to North America?

No

Synonyms

  • Chamomilla inodora (L.) Gilib.
  • Matricaria inodora L.
  • Matricaria maritima L. ssp. inodora (L.) Clapham
  • Matricaria maritima L. var. agrestis (Knaf) Wilmott
  • Matricaria perforata Mérat
  • Tripleurospermum perforatum (Mérat) M. Laínz

Family

Asteraceae

Need Help?

Get Help

Information from Dichotomous Key of Flora Novae Angliae

1.  Tripleurospermum inodorum (L.) Schultz-Bip. E

corn scentless-chamomile. Chamomilla inodora (L.) Gilib.; Matricaria inodora L.; M. maritima L. ssp. inodora (L.) Clapham; M. maritima L. var. agrestis (Knaf) Wilmott; M. perforata Mérat; Tripleurospermum perforatum (Mérat) M. Laínz • CT, MA, ME, NH. Fields, roadsides, waste areas.