roughstalk bluegrass
(Poa trivialis)
This species is Introduced in the United States
Origin
Native to Europe.
Appearance
Poa trivalis is a perennial cool-season grass that grows in disturbed and turf areas. Roughstalk bluegrass is a less desirable tuft grass due to an intolerance for heat, drought, and traffic.
Foliage
Leaf-blades are boat-shaped and flat with rough edges near the tip. There are two distinct and clear lines on each side of the midrib.
Flowers
The roughstalk bluegrass inflorescence is an open branching panicle. Panicles are lance to egg-shaped in form and have a spread 3.2″ (8 cm) to 10″ (25 cm). Blooming occurs between February and March.
Fruit
P. trivialis flowers form seedheads after blooming with flattened spikelets with 2-3 seeds each. Reproduction takes place by aboveground stolons and seeds.
Ecological Threat
P. trivialis prefers disturbed moist areas and is generally considered a weed.
http://ipm.ucanr.edu/PMG/WEEDS/roughstalk_bluegrass.html
http://turfid.ncsu.edu/csPagedPdField.aspx?PlantID=POATR
Native to Europe.
Appearance
Poa trivalis is a perennial cool-season grass that grows in disturbed and turf areas. Roughstalk bluegrass is a less desirable tuft grass due to an intolerance for heat, drought, and traffic.
Foliage
Leaf-blades are boat-shaped and flat with rough edges near the tip. There are two distinct and clear lines on each side of the midrib.
Flowers
The roughstalk bluegrass inflorescence is an open branching panicle. Panicles are lance to egg-shaped in form and have a spread 3.2″ (8 cm) to 10″ (25 cm). Blooming occurs between February and March.
Fruit
P. trivialis flowers form seedheads after blooming with flattened spikelets with 2-3 seeds each. Reproduction takes place by aboveground stolons and seeds.
Ecological Threat
P. trivialis prefers disturbed moist areas and is generally considered a weed.
http://ipm.ucanr.edu/PMG/WEEDS/roughstalk_bluegrass.html
http://turfid.ncsu.edu/csPagedPdField.aspx?PlantID=POATR
Selected Images
Maps
EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org
State Lists - This map identifies those states that have this species on their invasive species list or law.
Invasive Listing Sources
- City of Ann Arbor Michigan Parks and Recreation
- Invasive Plant Species of West Virginia
- Jil M. Swearingen, Survey of invasive plants occurring on National Park Service lands, 2000-2007
- Maryland Code and Regulations Noxious Weed & Seed Law
- National Park Service, Mid-Atlantic Exotic Plant Management Team Invasive Plant List
- Nonnative Invasive Species in Southern Forest and Grassland Ecosystems
- Pennsylvania Department of Conservation and Natural Resources Invasive Plants
- WeedUS - Database of Plants Invading Natural Areas in the United States
- West Virginia Invasive Species Strategic Plan and Volunteer Guidelines 2014
- West Virginia Native Plant Society, Flora West Virginia Project, and West Virginia Curatorial Database System, September 3, 1999
Taxonomic Rank
| Domain: Eukarya |
| Kingdom: Plantae |
| Phylum: Magnoliophyta |
| Class: Magnoliopsida |
| Superorder: Lilianae |
| Order: Poales |
| Family: Poaceae |
| Genus: Poa |
| Poa trivialis |
Other System Links
Plants: POTR2
Bayer: POATR
GRIN: 29023
ITIS: 41163
NPDN Pest: PCACKBH
NPDN Host: 33048
References
Common Name Reference: Weed Science Society of America Common Names List
Scientific Name Reference: USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.