Common Reed Grass
(Phragmites australis ssp. australis)
- Name and Family
- History
- Identification Guide
- What it does in the ecosystem
- Management
- Image Gallery
- References
Name and Family
Common Reed Grass (Phragmites australis ssp. australis)
History
Common reed grass (Phragmites australis ssp. australis) is an invasive perennial grass that is native to Eurasia. It is not known for certain how it was moved to North America, but it likely arrived on the Atlantic coast accidentally via ballast materials in the late 1700s – early 1800s. (Swearingen, J. and K. Saltonstall. 2010)
Since establishing in North America, Phragmites australis ssp. australis has spread throughout continental U.S. and to most provinces in Canada. It prefers to grow in standing water but will tolerate growing in dryer areas. It can easily be confused with a closely related native subspecies, Phragmites australis ssp. americanus.
Identification Guide
Here are some key features that may help positively identify Common Reed Grass and distinguish it from its native relative:
Phragmites australis ssp. australis (Invasive):
- Grows in dense stands and crowds out other species
- Grows to be ~5 m tall, a much more robust plant than the native Phragmites
- Lower stems are tan or beige-coloured
- Leaves are arranged alternately and are a blue-green colour
- The panicle inflorescence (seed head) is larger and more full than the native subspecies’
- Begins growing earlier in the spring and grows later into the fall than the native subspecies
Phragmites australis ssp. americanus (Native):
- Grows in a more scattered manner, mixed in with other native wetland species
- Typically reaches 2 m in height
- Lower stems are red
- Leaves are yellowish-green, smaller than invasive Phragmites’, and distributed predominantly on the same side of the stem
- The panicle inflorescence (seed head) is smaller and more sparse
What it does in the ecosystem
Coming soon.
Management
Coming soon.
Image Gallery
Red lower stems of the native Phragmites australis ssp. americanus. Photo by Rosemary Curley, PEIISC. Invasive Phragmites australis ssp. australis along a US road. Photo by Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Leaf sheaths of Phragmites australis ssp. australis cling tightly around the stem. Photo by Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Phragmites australis ssp. australis panicle. Photo by Caleb Slemmons, National Ecological Observatory Network, Bugwood.org Native Phragmites australis ssp. americanus in foreground. Photo by Rosemary Curley, PEIISC. Stand of Phragmites australis ssp. australis. Photo by James H. Miller, USDA Forest Service, Bugwood.org
References
Coming soon.