Blooms: June-September
Habit: herb
Duration: perennial
Origin: Introduced
Distribution: Occurring throughout Washington; found in nearly all parts of North America.
Habitat: Disturbed sites, roadsides, edge of agricultural fields, mostly at low elevations.
Habit: herb
Duration: perennial
Origin: Introduced
Distribution: Occurring throughout Washington; found in nearly all parts of North America.
Habitat: Disturbed sites, roadsides, edge of agricultural fields, mostly at low elevations.
Species Description:
General: 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, up to 4 mm. broad.
Flowers: 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 ¾ as long as the glumes, scabrous on the keel, awnless; palea over ½ as long as the lemma; lodicules 2, 0.4 mm. long.
Fruits: Utricle
General: 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, up to 4 mm. broad.
Flowers: 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 ¾ as long as the glumes, scabrous on the keel, awnless; palea over ½ as long as the lemma; lodicules 2, 0.4 mm. long.
Fruits: Utricle
Accepted Name:
Agrostis gigantea RothSynonyms:
Agrostis gigantea Roth var. dispar (Michx.) Philipson
Agrostis nigra With.
Agrostis stolonifera L. ssp. gigantea (Roth) Schuebl. & Martens
Agrostis stolonifera L. var. major (Gaudin) Farw.
Treated in Flora of the PNW as:
Agrostis alba var. alba
Additional Resources:
PNW Herbaria Specimens: View list of Agrostis gigantea specimens in the Consortium of Pacific Northwest Herbaria database.
WTU Herbarium Specimens: View list of Agrostis gigantea specimens in the WTU Herbarium database.
Washington Flora Checklist: Agrostis gigantea treatment.
E-Flora BC: Agrostis gigantea atlas page.
CalPhotos: Agrostis gigantea images.
USDA Plants Database: Agrostis gigantea.
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
Richard Old
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 WA Native Plant Society |
