Northern Prairie Wildlife Research Center
Quackgrass (Agropyron repens)
- Family: Grass (Poaceae)
- Flowering: May-September
- Field Marks: Quackgrass is distinguished from other species of Agropyron by having creeping underground rootstocks and by its spikelets that have only 3-6 flowers.
- Habitat: Fields, roadsides, disturbed areas.
- Habit: Perennial herb with whitish, creeping underground rootstocks.
- Stems: Erect, smooth, up to 4 feet tall.
- Leaves: Up to 12 inches long, up to 1/2 inch broad, smooth on the upper surface, rough on the lower surface, with smooth sheaths.
- Flowers: 3-6 per spikelet, with several spikelets forming erect spikes up to 8 inches long; spikelets up to 3/4 inch long, with pointed or short-awned scales that have 5 or 7 conspicuous veins.
- Stamens: 3.
- Pistils: Ovary superior.
- Grains: Hairy at the tip.
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