Agrostis stolonifera |
Agrostis gigantea |
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spreading bent |
black bent |
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Habit | Stoloniferous perennial, also sometimes rhizomatous, the culms erect to decumbent, 5-8 dm. tall. | Rhizomatous perennial, also sometimes stoloniferous, the culms erect to decumbent, often to 12 dm. tall. |
Leaves | Sheaths open; ligules truncate to obtuse, 3-6 mm. long, usually lacerate; blades flat or folded, 4-10 mm. broad. |
Sheaths open; ligules truncate to obtuse, 3-6 mm. long, usually lacerate; blades flat or folded, up to 4 mm. broad. |
Flowers | Inflorescence a compressed to somewhat open panicle 5-30 cm. long, usually purplish, bearing spikelets nearly to the base; spikelets 1-flowered, articulate above the glumes; glumes subequal, 2-2.5 mm. long, acute; lemmas 2/3 to 3/4 as long as the glumes, scabrous on the keel, awnless; palea over 1/2 as long as the lemma; lodicules 2, 0.4 mm. long. |
Inflorescence an open panicle 5-30 cm. long, usually purplish, the branches spreading to ascending, bearing spikelets nearly to the base; spikelets 1-flowered, articulate above the glumes; glumes subequal, 2-2.5 mm. long, acute; lemmas 2/3 to 1/2 as long as the glumes, scabrous on the keel, awnless; palea over 1/2 as long as the lemma; lodicules 2, 0.4 mm. long. |
Fruits | Utricle |
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Agrostis stolonifera |
Agrostis gigantea |
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Flowering time | June-September | June-September |
Habitat | Wet, disturbed areas that include streambanks, flooded fields, and ditches at low to moderate elevations. | Disturbed sites, roadsides, edge of agricultural fields, mostly at low elevations. |
Distribution | Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
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Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast.
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Origin | Introduced from Eurasia | Introduced from Eurasia |
Conservation status | Not of concern | Not of concern |
Sibling taxa | ||
Web links |
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