Page author: Don Knoke
Panicum dichotomiflorum
fall panicum

Distribution: Native in most of central and eastern United States; occasionally introduced in Washington.

Habitat: Waste ground.

Flowers: May - September

Origin: Introduced

Conservation Status: Not of concern


Annual, branching from the base, the culms somewhat decumbent, up to 1 m. tall.


Sheaths open, usually glabrous; articulation below the glumes; ligules 2-3 mm. long; blades 5-12 mm. broad, usually glabrous.


Inflorescence an open panicle 1.5-3 dm. long, the branches ascending; spikelets 2-flowered, about 2.5 mm. long; first glume oval, less than 1 mm. long; second glume acute, faintly 9-nerved; lower lemma sterile, with a translucent palea 1-1.5 mm. long; hardened, fertile upper lemma and palea enclosed by the second glume and sterile lemma

Accepted Name:
Panicum dichotomiflorum Michx.

Synonyms & Misapplications:
(none provided)
ssp. dichotomiflorum – fall panicum, western witchgrass
Additional Resources:

PNW Herbaria: Specimen records of Panicum dichotomiflorum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Panicum dichotomiflorum checklist entry.

E-Flora BC: Panicum dichotomiflorum atlas page.

CalPhotos: Panicum dichotomiflorum photos.

USDA Plants: Panicum dichotomiflorum information.

20 photographs:
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