Northern Prairie Wildlife Research Center
Northeast Wetland Flora
Field Office Guide to Plant Species
Poa trivialis L.
- Family: Grass (Gramineae)
- Flowering: June-August
- Field Marks: This bluegrass is characterized by its lemmas which are cobwebby at the base
and hairy on the keel, but smooth on the nerves. The stem beneath the panicle is rough to
- Habitat: Damp soil.
- Habit: Tufted perennial herb with thickened rootstocks but without rhizomes.
- Stems: Upright or spreading at the base and rooting at the nodes, weak, usually
unbranched, rough to the touch, at least below the panicle, up to 3 1/2 feet tall.
- Leaves: Elongated, flat, up to 1/4 inch wide, smooth or rough to the touch; sheaths rough
to the touch.
- Flowers: Borne in spikelets, the spikelets arranged in panicles up to 8 inches long; spikelets
2- to 3-flowered, up to 1/4 inch long, on rough stalks.
- Glumes: Lanceolate, pointed at the tip, smooth, up to 1/6 inch long.
- Lemmas: Narrowly ovate, pointed at the tip, up to 1/6 inch long, hairy on the keel but not
on the nerves, cobwebby hairy at the base.
- Sepals: 0.
- Petals: 0.
- Stamens: 3.
- Pistils: Ovary superior, smooth.
- Fruits: Grains ellipsoid to obovoid, smooth.
- Notes: Gleason and Cronquist call this family Poaceae.
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