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broadleaf arrowhead

Sagittaria latifolia

iNaturalist Wikipedia

The broadleaf arrowhead is a striking wetland icon known for its spear-shaped foliage and edible 'duck potato' tubers. A favorite of pollinators and waterfowl alike, it is the architect of the marshy shoreline.

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0 Habitats

Quick Identification

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Size

Height 30-120 cm (1-4 ft); leaves 10-30 cm (4-12 in) long.

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Colors

Bright emerald green foliage; brilliant white flowers with yellow (male) or green (female) centers.

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Key Features

Distinctive arrowhead or spear-shaped leaves with pointed basal lobes
Flowers arranged in whorls of three on an upright stalk
Spongy, succulent stems growing from submerged mud
Produces round, starchy underground tubers (duck potatoes)

When You’ll See Them

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Activity pattern Active during the day

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Peak hours 6 AM - 8 PM (Daylight hours for photosynthesis and flowering)

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Season June-September

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Diet Autotrophic; produces energy through photosynthesis using sunlight, water, and carbon dioxide, while drawing minerals from the saturated soil.

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Habitat Shallow freshwater wetlands, pond margins, slow-moving streams, and marshes.

public Geographic range

Where Does the broadleaf arrowhead Live?

Native to the North American continent, the broadleaf arrowhead is found extensively from the southern reaches of Canada down through the United States and Mexico, stretching into northern South America. It is most abundant in temperate and subtropical regions of the US, particularly along the Atlantic and Gulf coastal plains and throughout the Mississippi River basin. While indigenous to the Americas, it has been introduced to parts of Europe and Oceania where it occasionally naturalizes in suitable wetland habitats.

Basemap © OpenStreetMap contributors

6 Countries

15.5M km² Range

Least Concern Conservation

US United States CA Canada MX Mexico CO Colombia VE Venezuela EC Ecuador

Elevation range

0 m1,000 m2,000 m4,000 m

Sea level – 2,000 m

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iNaturalist / Verified observation data

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Behavior

Broadleaf arrowhead is a hardy aquatic perennial that serves as a cornerstone of wetland ecosystems. It is a pioneer species, often among the first to colonize new ponds, marshy edges, or disturbed wetlands. The plant exhibits high morphological plasticity, meaning its leaf shape can change dramatically based on water depth and flow; submerged leaves may appear narrow and ribbon-like, while emergent leaves take on the classic broad spearhead shape to maximize sunlight absorption.

Throughout the growing season, the plant spreads horizontally through an aggressive network of rhizomes, eventually forming dense colonies that stabilize shorelines and provide vital cover for aquatic life. During the late summer months, it sends up flowering stalks that attract a wide array of pollinators. As autumn approaches, the plant funnels its energy downward into the substrate, forming starchy, marble-sized tubers that allow it to survive winter dormancy even when the water surface freezes.

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Camera Tips

To capture the life of a broadleaf arrowhead colony, position your camera on a waterproof stake or tripod roughly 12 to 24 inches above the water line. Because the plant itself is stationary, focus your lens on a cluster of flower buds in mid-summer. This setup acts as a natural stage for capturing insect pollinators like hoverflies, solitary bees, and dragonflies, which frequently use the broad leaves as hunting platforms or resting spots.

Wetland environments are notoriously tricky for light exposure due to water reflections. Angle your camera to avoid direct glare from the sun, or position it so the morning light illuminates the translucent petals of the white flowers from the side. Using a camera with a high-trigger speed is essential if you hope to catch the rapid movement of dragonflies or the occasional hummingbird that may visit the blooms. If your camera supports time-lapse mode, set it to take one photo every hour during the spring to document the 'emergence' phase as the first leaves pierce the water's surface.

Don't stop recording when the flowers fade! In the autumn, reposition your camera to face the base of the plants where they meet the water. This is the prime time to capture waterfowl, such as Mallards or Wood Ducks, as they forage in the mud. These birds are highly attracted to the nutritious 'duck potato' tubers, and you can often get excellent footage of 'tipping' behavior as they reach for the roots just beneath the surface.

Similar Species

Species that look similar or are commonly confused with broadleaf arrowhead.

Pickerelweed

Pickerelweed has spikes of violet-blue flowers and heart-shaped leaves, whereas Broadleaf Arrowhead has white flowers in whorls and sharper spear-shaped leaves.

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Frequently Asked Questions

As a plant, broadleaf arrowhead is 'active' during daylight hours when it performs photosynthesis. Its flowers are most attractive to pollinators from mid-morning to late afternoon during the peak summer months.

You can attract this species by creating a shallow water feature or rain garden with a muddy bottom. Plant nursery-grown tubers in 6-12 inches of water in a sunny location, and they will quickly colonize the area.

Broadleaf arrowhead doesn't 'eat' in the animal sense; it is a primary producer that creates its own food from sunlight via photosynthesis and absorbs nitrogen and phosphorus from the surrounding water and soil.

Yes, they are very common in suburban stormwater retention ponds, drainage ditches, and ornamental backyard ponds, provided the water is slow-moving or still.

Look for the white, three-petaled flowers arranged in whorls and the distinct lack of a prominent 'marginal vein' that similar-looking plants like Arrow Arum possess. Broadleaf arrowhead leaves also lack the purple flower spikes found on Pickerelweed.

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