Taraxacum latilobum DC.

large-lobed dandelion

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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

Large-lobed dandelion is a rare plant native to the Gulf of St. Lawrence. Its status in New England is uncertain. The Maine populations may be introduced, the Massachusetts occurrence was definitely an introduction.

Habitat

Anthropogenic (man-made or disturbed habitats)

Characteristics

Habitat
terrestrial
New England state
  • Maine
  • Massachusetts
Leaf type
leaves are simple (i.e., lobed or unlobed but not separated into leaflets)
Leaf arrangement
basal: the leaves are growing only at the base of the plant
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 ray flowers only, meaning all of the individual flowers of the flower head have a strap-shaped ray, which may or may not have teeth at the very tip of the ray
Ray flower color
yellow
Tuft or plume on fruit
at least a part of the plume is made up of fine bristles
Spines on plant
the plant has no spines
Leaf blade length
150–475 mm
Disk flower number
  • 0
  • NA
Show All Characteristics
  • Flowers
    Bases of bract appendages
    NA
    Bract color
    the bracts are colored, or at least tinged with, pink, red or purple
    Bract cycle number
    there are two main cycles of bracts
    Bract keels
    the bracts do not have keels
    Bract margins
    • there are few or no fine hairs along the bract margins
    • there are fine hairs along the bract margins
    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 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
    Bract tip color
    the tips are a different color from the center of the bract
    Bract tip extension appearance
    NA
    Bract tip extension edge
    there are no projections from the bract tips
    Bract tip orientation
    the tips of the bracts curve outwards and downwards from the plant
    Bract tip shape
    the tips of the bracts are acuminate (tapered to a narrow point)
    Bract width
    1.4–2
    Bracts
    there are at least two distinct forms of bracts in different cycles
    Disk flower color
    NA
    Disk flower lobe number
    NA
    Disk flower number
    • 0
    • NA
    Disk flower proportions
    NA
    Disk flower reproductive parts
    NA
    Disk flower shape
    NA
    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 no bristles or papery scales
    Flower head platform surface
    NA
    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
    Flower head shape
    the sides of the flower head are roughly parallel, like a cylinder
    Flower type in flower heads
    the flower head has ray flowers only, meaning all of the individual flowers of the flower head have a strap-shaped ray, which may or may not have teeth at the very tip of the ray
    Height of flower head base
    13–25 mm
    Inflorescence branching (Solidago)
    NA
    Inflorescence shape
    NA
    Inflorescence stem
    • hairs are present on the stem of the inflorescence
    • the stem of the inflorescence is not hairy
    Number of bracts at flower head base
    13–19
    Ovary beak
    there is a beak on the ovary
    Ovary cross-section
    the ovary has five or more corners in cross-section
    Ovary lines or ribs
    there are four to six lines or ribs visible on the ovary
    Ovary profile
    in profile, the ovary is lance-shaped, but widest above the middle
    Ovary surface
    the ovary surface is textured with tiny points, bumps or wrinkles
    Peduncle hairs
    • the peduncles are hairy
    • the peduncles have no hairs
    Ray flower color
    yellow
    Ray flower reproductive parts
    the ray flowers have both carpels and stamens
    Ray flowers
    • 16-25
    • 26-50
    • more than 50
    Ray length
    13–17 mm
    Reproductive system
    all the flowers on the plant contain both carpels and stamens
    Scale tip
    NA
    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
    8–40 mm
  • Fruits or seeds
    Ovary beak length
    8–12 mm
    Ovary length in developed fruit
    2.8–3.8 mm
    Seed hair tuft color
    the pappus hairs are white or off-white
    Seed hair tuft length
    6.5–7 mm
    Seed tuft type
    the pappus is made of very fine hairs or bristles
    Top of disk flower ovary
    NA
    Tuft or plume on fruit
    at least a part of the plume is made up of fine bristles
  • Glands or sap
    Sap
    the sap is milky and opaque, and may be white or colored
  • Growth form
    Growth form
    the plant has one or more free-standing stems
    Plant lifespan
    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
    • the plant has a caudex (the root mass is firm and hardened at the top)
    • there is a thickened taproot 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 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
    basal: the leaves are growing only at the base of the plant
    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
    Leaf blade hairs
    the leaf blade has simple hairs with no glands, and not tangled or wooly
    Leaf blade length
    150–475 mm
    Leaf blade shape
    • the leaf blade is oblanceolate (lance-shaped, but with the widest point above the middle of the leaf blade)
    • 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 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
    25–90 mm
    Leaf disposition
    the lower leaves are larger, toothier, and/or on longer stalks than the upper leaves
    Leaf spines
    there are no spines on the leaf edges
    Leaf stalk
    • the leaves have leaf stalks
    • the leaves have no leaf stalks, but attach directly to the stem
    Leaf tip extension
    NA
    Leaf type
    leaves are simple (i.e., lobed or unlobed but not separated into leaflets)
    Specific leaf type
    the leaves are simple (i.e., lobed or unlobed but not separated into leaflets
    Teeth per side of leaf blade
    5–7
  • Place
    Habitat
    terrestrial
    New England state
    • Maine
    • Massachusetts
    Specific habitat
    man-made or disturbed habitats
  • Stem, shoot, branch
    Flowering stem cross-section
    the flowering stem is circular, or with lots of small angles
    Leaves on stem
    the flowering stem has no leaves above the base
    Stem internode hair direction
    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
absent
Maine
present
Massachusetts
present
New Hampshire
absent
Rhode Island
absent
Vermont
absent

Conservation Status

None

Native to North America?

Yes and no (some introduced)

Sometimes Confused With

Taraxacum officinale

Synonyms

  • Leontodon latiloba (DC.) Britt.
  • Taraxacum officinale G.H. Weber ex Wiggers ssp. vulgare (Lam.) Schinz & R. Keller
  • Taraxacum vulgare Lam.

Family

Asteraceae

Genus

Taraxacum

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Information from Dichotomous Key of Flora Novae Angliae

2.  Taraxacum latilobum DC. nC

large-lobed dandelion. Leontodon latiloba (DC.) Britt.; Taraxacum officinale G.H. Weber 
 ex Wiggers ssp. vulgare (Lam.) Schinz & R. Keller; T. vulgare Lam. • MA, ME. Open, often disturbed, soil, dumps. The status of this species in New England is debatable. The MA 
 record is certainly introduced, and those from ME may be as well.