USDA, NRCS. 2018. The PLANTS Database (http://plants.usda.gov, 28 March 2018). National Plant Data Team, Greensboro, NC 27401-4901 USA.
What is Grassy Arrowhead?
- Either thin, wide linear flattened leaf or slender leaf blades
- Bladeless or thinly sword-shaped tapering blades
- Up to 8 inches long & 1 inch wide
- Thread-like ascending
- Spreading pedicels up to 1.19 inches long
- Oval-shaped bracts up to 0.25 inches long
- Sepals oval-shaped, up to 0.2 inches long
- Petals white or rarely pinkish, up to 0.25 inches long
- Single seed
- Does not open to release seed when ripe
- 0.08 inches long & 0.02 inches wide
- Flat sides or with 1-2 narrow ridges
- Up to 10 whorls
- Rooted in mud
Where Does it Grow?
Grassy arrowhead can be found in the shallow water of ditches, ponds, marshes, or streams.
Pros and Cons of Arrowhead
The tubers of arrowheads are prized foods by ducks, geese, muskrats, and nutria. Seeds are sometimes consumed by ducks. Submerged portions of all aquatic plants provide habitats for many micro and macro invertebrates. These invertebrates in turn are used as food by fish and other wildlife species (e.g. amphibians, reptiles, ducks, etc.). After aquatic plants die, their decomposition by bacteria and fungi provides food (called “detritus”) for many aquatic invertebrates.