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Native Plant Trust: Go Botany Discover thousands of New England plants

Peltandra virginica — green arrow-arum

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Facts

Green arrow-arum is a wetland plant of the eastern United States, absent from Northern New England. It is pollinated by a chloropid fly (Elachiptera formosa) that deposits its eggs in the inflorescence. The emerging larvae feed on the rotting pollen-producing portion of the spadix. The fruits and seeds are eaten by waterfowl and migratory birds. Early historical accounts describe Native Americans of the mid-Atlantic region making much use of the plant's large, starchy rhizomes as a staple food, but only after considerable processing to remove the calcium oxalate chrystals that render it otherwise inedible.

Habitat

Lacustrine (in lakes or ponds), riverine (in rivers or streams), shores of rivers or lakes, swamps, wetland margins (edges of wetlands)

New England distribution

Adapted from BONAP data

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North America distribution

Adapted from BONAP data

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Characteristics

Habitat
  • aquatic
  • wetlands
New England state
  • Connecticut
  • Maine
  • Massachusetts
  • New Hampshire
  • Rhode Island
  • Vermont
Leaf arrangement
the leaves are growing only at the base of the plant (basal)
Leaf blade shape
  • the leaf blade is cordate (heart-shaped with backward-facing rounded lobes), or sagittate (arrow-shaped with backward-facing pointed lobes)
  • the leaf blade is lanceolate (lance-shaped; widest below the middle and tapering at both ends)
  • the leaf blade is ovate (widest below the middle and broadly tapering at both ends)
Leaf blade length
90–570 mm
Flower petal color
NA
Flower petal length
0 mm
Petal fusion
NA
Inflorescence type
  • the inflorescence differs from the choices given
  • the inflorescence is a spike (a long unbranched stem with flowers along it that lack stalks)
Ovary position
the ovary is above the point of petal and/or sepal attachment
Fruit type (specific)
the fruit is a berry (fleshy, with the wall enclosing one or more sections, with two or more seeds)
Fruit length
10–18 mm
Show all characteristics

  • Clonal plantlets

    Axillary bulblets
    there are no bulblets being produced in axils

  • Flowers

    Anther attachment
    the anther is attached by its base to the filament
    Bulblets replace flowers
    there are no bulblets where the flowers are located
    Carpels fused
    NA
    Flower bract length
    0 mm
    Flower bracts
    there are no bracts associated with the flower
    Flower number
    3–900
    Flower petal color
    NA
    Flower petal length
    0 mm
    Flower shape
    NA
    Flower symmetry
    NA
    Form of style
    the style is knob-like at the tip, and unbranched
    Fringed petal edges
    NA
    Hairs on flower stalk
    NA
    Inflorescence hair glands
    the axis of the inflorescence has no hairs on it
    Inflorescence length
    70–250 mm
    Inflorescence type
    • the inflorescence differs from the choices given
    • the inflorescence is a spike (a long unbranched stem with flowers along it that lack stalks)
    Length of flower stalk
    0 mm
    Length of peduncle
    200–560 mm
    Marks on petals
    NA
    Nectar spur
    the flower has no nectar spurs
    Number of carpels
    1
    Number of pistils
    1
    Number of sepals and/or petals
    there are no petals, sepals or tepals in the flower, or they are not clearly present
    Number of styles
    1
    Ovary position
    the ovary is above the point of petal and/or sepal attachment
    Petal and sepal arrangement
    the flower includes neither petals nor sepals
    Petal appearance
    NA
    Petal base
    NA
    Petal fusion
    NA
    Petal hairs on inner/upper surface
    NA
    Petal nectaries
    NA
    Sepal appearance
    NA
    Sepal length
    0 mm
    Sepal orientation
    NA
    Sepals fused only to sepals
    NA
    Spathe
    the plant has a spathe surrounding the flower spike
    Spathe form
    the spathe encloses or nearly encloses the spike of flowers
    Spathe length
    100–200 mm
    Stamen number
    • 4
    • 5
    Stamen position relative to petals
    NA
    Stamens fused
    the stamens are fused to one another at or near their bases
    Stamens fused outwards
    NA
    Style petal-like
    the style is not broad and flattened like a petal
    Tepals
    NA

  • Fruits or seeds

    Berry color
    • brown
    • green
    • purple
    • red
    Capsule ridges
    NA
    Fruit cross-section
    the fruit is round in cross-section
    Fruit length
    10–18 mm
    Fruit stalk orientation
    NA
    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
    6–16 mm
    Other markings on berry
    the ripe fruits have spots or streaks on them

  • Glands or sap

    Sap
    the sap is milky and opaque, and may be white or colored

  • Growth form

    Lifespan
    the plant lives more than two years
    Root septa
    the roots do not have transverse septa
    Underground organs
    the plant has a rhizome (a horizontal underground stem with roots growing from it)

  • Leaves

    Hairs on underside of leaf blade
    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 not hairy, or has very few hairs
    Leaf arrangement
    the leaves are growing only at the base of the plant (basal)
    Leaf blade basal lobes
    the leaf blades are lobed at their bases
    Leaf blade base
    the leaf has a distinct leaf stalk (petiole)
    Leaf blade base shape
    The base of the leaf blade is cordate (heart-shaped, with rounded lobes) or sagittate (arrow-shaped, with pointed, backward-facing lobes)
    Leaf blade bloom
    • the underside of the leaf blade has a noticeable waxy or powdery bloom
    • the underside of the leaf blade has no noticeable waxy or powdery bloom
    Leaf blade cross-section
    the leaf blade is more or less flat in cross-section
    Leaf blade faces
    both surfaces of the leaf blade are exposed
    Leaf blade form
    Fully-formed (i.e., expanded), +/- green leaf blades are found somewhere on the plant
    Leaf blade length
    90–570 mm
    Leaf blade orientation
    the upper surface of the leaf blade faces the stem of the plant
    Leaf blade shape
    • the leaf blade is cordate (heart-shaped with backward-facing rounded lobes), or sagittate (arrow-shaped with backward-facing pointed lobes)
    • the leaf blade is lanceolate (lance-shaped; widest below the middle and tapering at both ends)
    • the leaf blade is ovate (widest below the middle and broadly tapering at both ends)
    Leaf blade surface colors
    the upper side of the leaf blade is relatively uniform in color
    Leaf blade tip
    • the tip of the leaf blade is acuminate (tapers to a long, thin point)
    • the tip of the leaf blade is rounded, with no point
    Leaf blade veins
    the lateral veins are palmate, (and do not arch towards the leaf tip) or pinnate
    Leaf blade width
    25–310 mm
    Leaf stalk length
    380–980 mm
    Leaf type
    the leaves are simple (lobed or unlobed but not separated into leaflets
    Leaflet number
    0
    Stipule twining
    NA
    Stipules
    there are no stipules on this plant

  • Place

    Habitat
    • aquatic
    • wetlands
    New England state
    • Connecticut
    • Maine
    • Massachusetts
    • New Hampshire
    • Rhode Island
    • Vermont
    Specific habitat
    • edges of wetlands
    • in lakes or ponds
    • in rivers or streams
    • shores of rivers or lakes
    • swamps

  • Scent

    Plant odor
    the leaves have no particular smell

  • Stem, shoot, branch

    Flowering stem growth form
    the flowering stem is held upright
    Flowering stem leaves
    there are no true leaves on the flowering stem
    Stem hairs
    NA

Wetland status

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

In New England

Distribution

Connecticut
present
Maine
present
Massachusetts
present
New Hampshire
present
Rhode Island
present
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)
Vermont
rare (S-rank: S2)

From Flora Novae Angliae dichotomous key

1.  Peltandra virginica (L.) Raf. ex Schott N

green arrow-arum. Arum virginicum L. • CT, MA, ME, NH, RI, VT; not northern. Swamps, shallow water of lakes and rivers, and organic soil wetlands.

Native to North America?

Yes

Synonyms

  • Arum virginicum L.

Family

Araceae

Genus

Peltandra