USDA, NRCS. 2018. The PLANTS Database (http://plants.usda.gov, 28 March 2018). National Plant Data Team, Greensboro, NC 27401-4901 USA.
Illustration: USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner’s Sons, New York. Vol. 3: 26.
What is Swamp Milkweed?
- Egg or sword-shaped
- 2-5 inches long
- Up to 1.5 inches wide
- Leaf stalks up to 0.39 inches long
- Usually paired at nodes
- Many flowered
- Bright pink, rarely white in color
- Opens on one side to release seed when ripe
- 2.75-3.5 inches long
- Up to 0.5 inch thick
- 0.28-0.39 inches long
- 1.25-5 feet tall
- Short rootstalks
Where Does it Grow?
Swamp milkweed can be found in marshes and along the edges of lakes and streams.
Pros and Cons of Swamp Milkweed
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.