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Sagittaria cuneata Sheldon

Arumleaf arrowhead

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassLiliopsidaMonocots (plants with a single seed leaf); includes the lily family
SubclassAlismatidaeAquatic and marshy plants
OrderAlismatalesHerbaceous flowering plants found in marshy habitats
FamilyAlismataceaeWater-plantain family
GenusSagittariaFrom Latin sagitta, “arrow,” for the leaf shape
SpeciescuneataFrom Latin for “wedge-shaped,” also for the leaf shape

About plant names...

Arumleaf arrowhead is a widespread North American native.

Identification: Arumleaf arrowhead has arrowhead-shaped leaves 1¾-6″ (5-15 cm) long, on stalks that are triangular in cross-section. In addition to arrow-shaped leaves that are mostly above the water line, arumleaf arrowhead may have floating or submersed leaves that are long and narrow, and floating leaves that are oval- or heart-shaped. Flowers are white, with yellow centers. Each flower has three petals and three green sepals, and is up to ⅞″ (2.5 cm) in diameter. Fruits are about 1/16″ (2 mm) long, clustered on spherical heads.

 

Sagittaria cuneata (arumleaf arrowhead)

9/7/2010 · Tower Hill Botanic Garden, Boylston, Mass­a­chu­setts · ≈ 8 × 12″ (20 × 31 cm) ID is uncertain

Sagittaria cuneata (arumleaf arrowhead)

6/2/2010 · J. Harry Rich State Forest, Groton, Mass­a­chu­setts · ≈ 1 × 2′ (41 × 62 cm) ID is uncertain

Arumleaf arrowhead is easily confused with broadleaf arrowhead:

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Sagittaria cuneata

Sagittaria latifolia
Common Name

arumleaf arrowhead

arrowhead
Flowers Each flower has three white petals with yellow centers, and three green sepals; flowers are ⅜-¾″ (1-2 cm) in diameter. Flower stalks held upward, not outward. Each flower has three white petals with yellow centers, and three green sepals; flowers are 1½″ (4 cm) in diameter. Flower stalks held outward, not upward.
Leaves Leaves are 1¾-6″ (5-15 cm) long. May also have floating or submersed leaves that are long and narrow, and floating leaves that are oval- or heart-shaped. 1¾-18″ (5-45 cm) long.
Stem Stalks are triangular in cross-section. Stems angular in cross section.
Range/ Zones

USDA Zones: 4-11
Habitats Shallow wetlands, river banks Shallow wetlands, river banks
Type Wild Wild

 

Online References:

The Washington State Department of Ecology

The Massachusetts Division of Fisheries and Wildlife Natural Heritage & Endangered Species Program

The Jepson Manual

The Oregon Flora Image Project

Plants for a Future, a resource and information centre for edible and otherwise useful plants

The Washington State Department of Ecology

EFloras

Sagittaria cuneata (arumleaf arrowhead)

6/2/2010 · J. Harry Rich State Forest, Groton, Mass­a­chu­setts ID is uncertain

Sagittaria cuneata (arumleaf arrowhead)

6/2/2010 · J. Harry Rich State Forest, Groton, Mass­a­chu­setts ID is uncertain

Sagittaria cuneata (arumleaf arrowhead)

8/24/2013 · Cranberry Meadow Pond Trail, Monadnock Conservancy, Peterborough, New Hamp­shire · ≈ 8 × 12″ (21 × 31 cm)

Sagittaria cuneata (arumleaf arrowhead)

8/24/2013 · Cranberry Meadow Pond Trail, Monadnock Conservancy, Peterborough, New Hamp­shire · ≈ 6 × 9″ (16 × 23 cm)

Sagittaria cuneata (arumleaf arrowhead)

5/5/2010 · Nashua River at Rte 119, Groton, Mass­a­chu­setts · ≈ 1 × 2′ (41 × 62 cm) ID is uncertain

Sagittaria cuneata (arumleaf arrowhead)

8/8/2010 · Jeff Smith Trail, Beaver Brook Association Conservation Lands, Rte. 130, Hollis, New Hamp­shire · ≈ 7 × 10″ (16 × 25 cm) ID is uncertain

Sagittaria arifolia Nutt. ex J.G. Sm.

 

Sagittaria cuneata description by Thomas H. Kent, last updated 25 May 2020.

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Sagittaria cuneata (arumleaf arrowhead)

8/8/2010 · Jeff Smith Trail, Beaver Brook Association Conservation Lands, Rte. 130, Hollis, New Hamp­shire · ≈ 3 × 4½″ (7.5 × 11 cm) ID is uncertain

Sagittaria cuneata (arumleaf arrowhead)

8/28/2010 · Lake Messalonskee, Belgrade Lake, Maine · By Constance B. Kent ID is uncertain

Sagittaria cuneata (arumleaf arrowhead)

8/24/2013 · Cranberry Meadow Pond Trail, Monadnock Conservancy, Peterborough, New Hamp­shire · ≈ 8 × 12″ (21 × 31 cm)

Sagittaria cuneata (arumleaf arrowhead)

8/28/2010 · Lake Messalonskee, Belgrade Lake, Maine · By Constance B. Kent ID is uncertain

Sagittaria cuneata (arumleaf arrowhead)

8/21/2017 · Pearl Hill State Park, Townsend, Mass­a­chu­setts · ≈ 12 × 8″ (31 × 20 cm)

Sagittaria cuneata (arumleaf arrowhead)

4/27/2010 · Nashua River at Rte. 119, Pepperell, Mass­a­chu­setts ID is uncertain

Sagittaria cuneata (arumleaf arrowhead)

8/24/2013 · Cranberry Meadow Pond Trail, Monadnock Conservancy, Peterborough, New Hamp­shire · ≈ 7 × 10″ (16 × 25 cm)

Range:

About this map...