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• Nuphar
• Nuphar advena

Nuphar advena — immigrant pond-lily

Facts

Immigrant pond-lily, contrary to its popular name, is native to North America. At the northern extreme of its range it sneaks into New England, with populations in Connecticut and disjunct occurrences in Maine. The plant has food and medicinal value, and was used by the Iroquois to treat a variety of internal and external ailments.

Habitat

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

Characteristics

• Clonal plantlets

  Turion length

  0 mm

• Flowers

  Anther color

  there is a noticeable pink, reddish or purplish tint to the anthers

  Anther length

  3–7 mm

  Carpels fused

  the carpels are fused to one another

  Flower lower lip length

  0 mm

  Flower number

  1

  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 length

  Up to 25 mm

  Inflorescence type

  the inflorescence has only one flower on it

  Inflorescence width

  30–50 mm

  Length of flower stalk

  0 mm

  Length of peduncle

  500 mm

  Nectar spur

  the flower has no nectar spurs

  Number of carpels

  3–35

  Ovary position

  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

  NA

  Petal color

  yellow

  Petal fringed edges

  the petals are not fringed

  Petal fusion

  the perianth parts are separate

  Petal hairs on inner/upper surface

  there are no hairs on the inner/upper petal surface

  Petal length

  10–15 mm

  Petal number

  At least 8

  Petal or sepal number

  • there are seven or more petals, sepals, or tepals in the flower
  • there are six petals, sepals, or tepals in the flower

  Pistil number

  1

  Sepal appearance

  the sepals resemble petals in color and texture

  Sepal length

  25–59 mm

  Sepal number

  6

  Sepals fused only to sepals

  the sepals are separate from one another

  Spur length

  0 mm

  Stamen number

  13 or more

  Stamen position relative to petals

  NA

  Stamens fused to petals

  the stamens are not fused to the petals or tepals

  Style length

  0 mm

  Style number

  0

• Fruits or seeds

  Fruit length

  20–50 mm

  Fruit type (general)

  the fruit is fleshy

  Fruit type (specific)

  the fruit is a berry (fleshy, with the wall enclosing one or more sections, with two or more seeds)

  Fruit width

  20–50 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

  90–300 mm

  Floating leaf length

  120–400 mm

  Floating leaf shape

  the leaf blade is ovate (widest below the middle and broadly tapering at both ends)

  Floating leaf tip

  • the tip of the floating leaf blade is obtuse (bluntly pointed)
  • 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

  Leaf blade length

  120–400 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

  70–300 mm

  Leaf position

  • some of the leaves are floating at the surface of the water
  • the leaves are all submerged underwater

  Leaf special features

  none of the mentioned special features are present

  Leaf-like branch segments

  0

  Leaf-like branch shape

  NA

  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)

  Underwater leaf blade width

  70–300 mm

  Underwater leaf length

  120–400 mm

  Underwater leaf stalk

  yes

  Underwater leaf stalk length

  500 mm

  Underwater leaf tip shape

  • the tip of the underwater leaf is obtuse (bluntly pointed)
  • the tip of the underwater leaf is rounded, with no point

• Place

  Habitat

  • aquatic
  • wetlands

  New England state

  • Connecticut
  • Maine
  • Massachusetts

  Specific habitat

  • in lakes or ponds
  • in rivers or streams
  • shores of rivers or lakes

• 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

From the dichotomous key of Flora Novae Angliae