Nymphoides peltata (Gmel.) Kuntze

yellow floating-heart

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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

Yellow floating-heart is a Eurasian species that has become invasive in parts of North America, including New England. It is a popular water garden plant, but its use is banned in states where it occurs in the wild. It grows in still or slow-moving water of lakes and rivers.

Habitat

Lacustrine (in lakes or ponds), riverine (in rivers or streams)

Characteristics

Habitat
aquatic
New England state
  • Connecticut
  • Massachusetts
  • Vermont
Leaf position
some of the leaves are floating at the surface of the water
Leaf arrangement
  • alternate: there is one leaf per node along the stem
  • opposite: there are two leaves per node along the stem
Leaf blade length
50–150 mm
Petal or sepal number
there are five petals, sepals, or tepals in the flower
Petal color
yellow
Specific leaf type
the leaf is not divided, rather the blade is made up of one segment
Floating leaf shape
  • the leaf blade is cordate (heart-shaped with backward-facing rounded lobes)
  • the leaf blade is orbicular (roughly circular, as wide as long)
  • the leaf blade is ovate (widest below the middle and broadly tapering at both ends)
  • the leaf blade is reniform (kidney-shaped; wider than long, with a basal sinus)
Fruit type (general)
the fruit is dry but does not split open when ripe
Show All Characteristics
  • Clonal plantlets
    Turion length
    0 mm
  • Flowers
    Anther color
    there is a noticeable pink, reddish or purplish tint to the anthers
    Anther length
    2–6 mm
    Carpels fused
    the carpels are fused to one another
    Flower lower lip length
    0 mm
    Flower number
    2–5
    Flower position
    the flowers are above the surface of the water
    Flower symmetry
    there are two or more ways to evenly divide the flower (the flower is radially symmetrical)
    Inflorescence type
    the inflorescence is an umbel (with an axis so short it appears the flowers all originate from the same point)
    Length of flower stalk
    30–100 mm
    Nectar spur
    the flower has no nectar spurs
    Number of carpels
    2
    Ovary position
    • the sepals and/or petals are attached above the ovary
    • the sepals and/or petals are attached below the ovary
    Palate on corolla
    no
    Petal and sepal arrangement
    the flower includes two cycles of petal- or sepal-like structures
    Petal appearance
    the petals are thin and delicate, and pigmented (colored other than green or brown)
    Petal color
    yellow
    Petal fringed edges
    the petals are fringed
    Petal fusion
    the perianth parts are fused to form a tube, cup, or bell shape
    Petal hairs on inner/upper surface
    there are no hairs on the inner/upper petal surface
    Petal length
    20–25 mm
    Petal number
    5
    Petal or sepal number
    there are five petals, sepals, or tepals in the flower
    Pistil number
    1
    Sepal appearance
    the sepals resemble leaves in color and texture
    Sepal length
    10–13 mm
    Sepal number
    5
    Sepals fused only to sepals
    the sepals are fused to each other (not other flower parts), at least near their bases
    Spur length
    0 mm
    Stamen length
    3–10 mm
    Stamen number
    5
    Stamen position relative to petals
    the stamens are lined up with the sepals
    Stamens fused
    the stamens are not fused to one another
    Stamens fused to petals
    the stamens are fused near the bases of the petals or tepals
    Style length
    1–10 mm
    Style number
    1
  • Fruits or seeds
    Fruit length
    12–25 mm
    Fruit type (general)
    the fruit is dry but does not split open when ripe
    Fruit type (specific)
    the fruit is a capsule (splits along two or more seams, apical teeth or pores when dry, to release two or more seeds)
    Fruit width
    8–11 mm
  • Glands or sap
    Oil glands on nodes
    none of the nodes have oil glands
    Sap
    the sap is clear and watery
  • Growth form
    Lifespan
    the plant lives more than two years
    Root septa
    the roots do not have transverse septa
    Roots floating in water
    there are no clusters of roots floating in the water
    Turions
    there are no turions on the plant
    Underground organs
    the plant has a rhizome (a horizontal underground stem with roots growing from it)
  • Leaves
    Bract position (Sparganium)
    NA
    Bract relative length
    At least 3854 mm
    Bracts
    neither the flowers nor their pedicels have bracts
    Floating leaf basal lobes
    yes
    Floating leaf blade width
    50–150 mm
    Floating leaf length
    50–150 mm
    Floating leaf shape
    • the leaf blade is cordate (heart-shaped with backward-facing rounded lobes)
    • the leaf blade is orbicular (roughly circular, as wide as long)
    • the leaf blade is ovate (widest below the middle and broadly tapering at both ends)
    • the leaf blade is reniform (kidney-shaped; wider than long, with a basal sinus)
    Floating leaf tip
    the tip of the floating leaf blade is rounded, with no point
    Floral bract form
    NA
    Floral bract length
    0 mm
    Leaf arrangement
    • alternate: there is one leaf per node along the stem
    • opposite: there are two leaves per node along the stem
    Leaf blade length
    50–150 mm
    Leaf blade veins
    the lateral veins radiate from the base and continue to spread away from the centerline of the leaf, or branch off the central vein at intervals
    Leaf blade width
    50–150 mm
    Leaf position
    some of the leaves are floating at the surface of the water
    Leaf special features
    none of the mentioned special features are present
    Leaf-like branch segments
    0
    Leaf-like branch shape
    the leaf-like branches are round
    Specific leaf type
    the leaf is not divided, rather the blade is made up of one segment
    Staminate bract edge (Myriophyllum)
    NA
    Stipule appearance
    NA
    Stipule fused to leaf
    NA
    Stipules
    there are no stipules on the plant
    Stipules fused around stem
    NA
    Trap-bladder length
    0 mm
    Underwater leaf blade edges
    the underwater leaf has smooth edges, without teeth
    Underwater leaf blade shape
    • the underwater leaf blade is cordate (heart-shaped with backward-facing rounded lobes)
    • the underwater leaf blade is orbicular (roughly circular, as wide as long)
    • the underwater leaf blade is ovate (widest below the middle and broadly tapering at both ends)
    • the underwater leaf blade is reniform (kidney-shaped; wider than long)
    Underwater leaf stalk
    yes
    Underwater leaf stalk length
    50–100 mm
    Underwater leaf tip shape
    the tip of the underwater leaf is rounded, with no point
  • Place
    Habitat
    aquatic
    New England state
    • Connecticut
    • Massachusetts
    • Vermont
    Specific habitat
    • in lakes or ponds
    • in rivers or streams
  • Stem, shoot, branch
    Flowering stem growth form
    the flowering stem is upright

Wetland Status

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

New England Distribution and Conservation Status

Distribution

Connecticut
present, invasive, prohibited
Maine
absent
Massachusetts
present, invasive, prohibited
New Hampshire
absent
Rhode Island
present
Vermont
present, invasive, prohibited

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

Sometimes Confused With

Nymphoides cordata

Synonyms

  • Limnanthemum peltatum Gmel.
  • Nymphoides nymphaeoides (L.) Britt.

Family

Menyanthaceae

Genus

Nymphoides

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Information from Dichotomous Key of Flora Novae Angliae

2.  Nymphoides peltata (Gmel.) Kuntze E

yellow floating-heart. Limnanthemum peltatum Gmel.; Nymphoides nymphaeoides (L.) Britt. 
• CT, MA, VT. Still or slow-moving water of lakes and rivers.