bulbous bluegrass USDA PLANTS Symbol: POBU
U.S. Nativity: Exotic
Habit: Grass or Grasslike
Poa bulbosa L.

Jump to: Images | Distribution Maps | Sources
Taxonomic Rank: Liliopsida: Cyperales: Poaceae
Synonym(s): bulbous blue grass
Native Range: Africa, temp. & trop. Asia, Europe (GRIN)

Appearance
Poa bulbosa is a perennial grass that can grow up to 7.8-31.5 in. (20-80 cm) tall. It has multiple common names but the most common are bird grass, June grass and Kentucky grass. P. bulbosa is native to Africa, temperate and tropical Asia and Europe.
Foliage
Sheath slightly compressed, not sharply keeled and split with overlapping margins. Leaf blade parallel sided, from 0.07-0.15 in. (2-4 mm) wide, keeled, and v-shaped. Foliage is a deep green color.
Flowers
Flowering occurs from May-June. Panicle is from 1.2-5.1 in. (3-13 cm) long, 1.18-3.15 in. (3-8 cm) wide and pyramid shaped. It is open with long branches. The branches at the base are in clusters of 3-5. There are 3-5 flowers per spikelet held on short, slender stalks.
Fruit
The fruit is a caryopsis (dry one-seeded fruit).
Ecological Threat
P. bulbosa overtakes open fields, yards and roadsides.

Selected Images from Invasive.orgView All Images at Invasive.org


Plant(s);
Steve Dewey, Utah State University, Bugwood.org
Additional Resolutions & Image Usage

Plant(s); inflorescence with bulblets.
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage

Plant(s);
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
Additional Resolutions & Image Usage

Plant(s);
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
Additional Resolutions & Image Usage

Plant(s);
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
Additional Resolutions & Image Usage

Flower(s); inflorescence lacking bulblets.
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage

Fruit(s);
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage

Flower(s);
Barry Rice, sarracenia.com, Bugwood.org
Additional Resolutions & Image Usage

Seed(s);
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage

EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org
 


State(s) Where Reported invasive.
Based on state level agency and organization lists of invasive plants from WeedUS database.

U.S. National Parks where reported invasive:
Yellowstone National Park (Wyoming)



Invasive Listing Sources:
City of Ann Arbor Michigan Parks and Recreation