Vitis riparia Michx.

river grape

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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

River grape grows on riverbanks and in many other habitats. Its almost hairless, lustrous green, coarsely-toothed leaves and few tendrils distinguish it from other grapes (Vitis). Although the fruits produced by this species tend to be sour to human tastes even when ripe, they do provide food for many species of birds. Many specialist insects feed on the leaves, stems, and roots.

Habitat

Anthropogenic (man-made or disturbed habitats), forest edges, forests, meadows and fields, shores of rivers or lakes

Characteristics

Habitat
terrestrial
New England state
  • Connecticut
  • Maine
  • Massachusetts
  • New Hampshire
  • Vermont
Growth form
the plant is a liana (a woody plant with a vine-like growth form)
Leaf type
the leaf blade is simple (lobed or unlobed but not separated into leaflets)
Leaves per node
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
  • the edge of the leaf blade has teeth
Leaf duration
the leaves drop off in winter (or they wither but persist on the plant)
armature on plant
the plant does not have spines, prickles, or thorns
Leaf blade length
100–200 mm
Leaf blade width
70–150 mm
Leaf stalk
the leaves have leaf stalks
Fruit type (general)
the fruit is fleshy
Bark texture
the bark of an adult plant peels off easily or hangs off
Twig winter color
  • brown
  • gray
  • green
Bud scale number
there are two scales on the winter bud, and their edges meet
Show All Characteristics
  • Buds or leaf scars
    Bud scale number
    there are two scales on the winter bud, and their edges meet
    Bud scar shape (Fraxinus)
    NA
    Collateral buds
    there are no collateral buds on the sides of the branches
    Leaf scar arrangement
    there is one leaf scar per node on the stem or twig
    Superposed buds
    there are no superposed buds on the branch
    Winter bud scales
    the winter bud is perulate (partially or completely covered with one or more scales)
    Winter bud stalks
    the winter buds have no stalks
  • Flowers
    Anther color
    the anthers show no hint of a pink, reddish or purplish tint
    Carpels fused
    the carpels are fused to one another
    Enlarged sterile flowers
    there are no enlarged sterile flowers on the plant
    Flower petal color
    yellow or green
    Flower symmetry
    there are two or more ways to evenly divide the flower (the flower is radially symmetrical)
    Hairs on ovary (Amelanchier)
    NA
    Hypanthium present
    the flower does not have a hypanthium
    Inflorescence hairs
    there are no hairs on the inflorescence
    Inflorescence type
    the inflorescence is a panicle (branched with the individual flowers on stalks)
    Number of pistils
    1
    Ovary position
    the ovary is above the point of petal and/or sepal attachment
    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 fusion
    the perianth parts are separate
    Sepal appearance
    the sepals resemble leaves in color and texture
    Sepal cilia (Ilex)
    NA
    Sepal tip glands
    there are no glands at the tips of the sepal lobes
    Stamen number
    5
    Stamen position relative to petals
    the stamens are lined up with the petals (antepetalous)
  • Fruits or seeds
    Berry color
    • black
    • some other color
    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)
    Nut with spines (Fagaceae)
    NA
    Wings on fruit
    there are no wings on the fruit
  • Glands or sap
    Sap color
    the sap is clear and watery
    Stalked glands on fruit (Rosa)
    NA
  • Growth form
    Growth form
    the plant is a liana (a woody plant with a vine-like growth form)
  • Leaves
    Hairs on underside of leaf blade
    • the underside of the leaf has hairs on it
    • the underside of the leaf has no hairs
    Hairs on upper side of leaf blade
    the upper side of the leaf is not hairy, or has very few hairs
    Leaf blade base shape
    The base of the leaf blade is cordate (heart-shaped, with rounded lobes)
    Leaf blade bloom
    the underside of the leaf has no noticeable bloom
    Leaf blade edges
    • the edge of the leaf blade has lobes, or it has both teeth and lobes
    • the edge of the leaf blade has teeth
    Leaf blade edges (Acer)
    NA
    Leaf blade flatness
    the leaf is flat (planar) at the edges
    Leaf blade hairs
    the hairs on the leaf blade are different from the choices given
    Leaf blade length
    100–200 mm
    Leaf blade scales
    there are no scales on the leaf blades
    Leaf blade shape
    • 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)
    Leaf blade texture
    • the leaf blade is coriaceous (has a firm, leathery texture)
    • the leaf blade is herbaceous (has a leafy texture)
    Leaf blade translucent dots
    there are no translucent dots on the leaf blade
    Leaf blade vein pattern
    the main veins of the leaf blade are palmate (radiate out from the base, like a hand)
    Leaf blade veins
    the leaf blade has three or more main veins running from the base (or near the base) towards the tip
    Leaf blade width
    70–150 mm
    Leaf duration
    the leaves drop off in winter (or they wither but persist on the plant)
    Leaf form
    the plant is broad-leaved (with broadly flattened leaf blades)
    Leaf lobe tips (Quercus)
    NA
    Leaf midrib glands
    the midrib of the leaf blade lacks glands on the upper surface
    Leaf stalk
    the leaves have leaf stalks
    Leaf stalk attachment to leaf
    the petiole attaches at the basal margin of the leaf blade
    Leaf stalk nectaries
    there are no nectaries on the leaf stalk
    Leaf stalk shape
    the leaf stalk is not flattened
    Leaf teeth
    • the leaf blade margin is serrate (with forward-pointing) or dentate (with outward-pointing) with medium-sized to coarse teeth
    • the leaf blade margin is undulate (wavy), but does not have teeth
    Leaf teeth hairs (Carya)
    NA
    Leaf type
    the leaf blade is simple (lobed or unlobed but not separated into leaflets)
    Leaves per node
    there is one leaf per node along the stem
    Specific leaf type
    the leaves are simple (lobed or unlobed but not separated into leaflets
    Stipules
    the plant has stipules
  • Place
    Habitat
    terrestrial
    New England state
    • Connecticut
    • Maine
    • Massachusetts
    • New Hampshire
    • Vermont
    Specific habitat
    • edges of forests
    • forests
    • man-made or disturbed habitats
    • meadows or fields
    • shores of rivers or lakes
  • Scent
    Plant odor
    the plant does not have much of an odor, or it has an unpleasant or repellant odor
  • Stem, shoot, branch
    Aerial roots
    the plant has no aerial roots
    Bark texture
    the bark of an adult plant peels off easily or hangs off
    Branch brittleness (willows only)
    NA
    Branch cross-section
    the branch is circular in cross-section, or it has five or more sides, so that there are no sharp angles
    First-year cane (Rubus)
    NA
    Lenticels on twigs
    there are no lenticels on the twigs, or they are very hard to see
    Pith shape
    the outline of the pith in a twig is roughly round
    Pith type
    the pith inside the twig is solid, completely filled with spongy tissue
    Short shoots
    there are peg- or knob-like shoots present
    Twig bloom
    there is no bloom on the twig
    Twig hairs
    • the twigs have few or no hairs on them
    • the twigs have hairs, but the hairs do not have glands
    Twig papillae (Vaccinium species only)
    NA
    Twig scales
    there are no scales on the twig surface
    Twig winter color
    • brown
    • gray
    • green
    Wings on branch
    the branch does not have wings on it
    armature on plant
    the plant does not have spines, prickles, or thorns

Wetland Status

Occurs in wetlands or non-wetlands. (Wetland indicator code: FAC)

New England Distribution and Conservation Status

Distribution

Connecticut
present
Maine
present
Massachusetts
present
New Hampshire
present
Rhode Island
absent
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)

Native to North America?

Yes

Sometimes Confused With

Vitis aestivalis:
lower surface of leaf blades either with a bloom or partially concealed by hairs, in either case the green color of the leaf obscured, and branchlets often with a bloom about the nodes (vs. V. riparia, with the lower surface of leaf blades green and nodes of branchlets without bloom). Vitis labrusca: tendrils and/or inflorescences produced from 3-7 consecutive nodes and leaf blades densely hairy on the lower surface with red-brown to gray hairs, the surface concealed (vs.V. riparia, with the tendrils and/or inflorescences produced from no more than 2 consecutive nodes and leaf blades sparsely hairy on the lower surface, the green surface clearly visible).

Synonyms

  • Vitis riparia var. praecox Engelm. ex Bailey
  • Vitis riparia var. syrticola (Fern. & Wieg.) Fern.
  • Vitis vulpina ssp. riparia (Michx.) R.T. Clausen
  • Vitis vulpina var. praecox (Engelm. ex Bailey) Bailey
  • Vitis vulpina var. syrticola Fern. & Wieg.

Family

Vitaceae

Genus

Vitis

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