Page author: Don Knoke
Panicum capillare

Distribution: Introduced and weedy in much of the United States and southern Canada.

Habitat: Moist and irrigated areas, along streams and around ponds.

Flowers: June - September

Origin: Native

Growth Duration: Annual

Conservation Status: Not of concern


Annual, branching from the base, the culms erect to decumbent, 2-7 dm. tall, copiously covered with soft hairs 2-4 mm. long.


Sheaths open; articulation below the glumes; ligules composed of straight hairs 1.5-2 mm. long; blades 5-12 mm. broad.


Inflorescence a diffusely-branched panicle 1-3 dm. long. often partially included in the uppermost sheath; spikelets 2-flowered, 2.5-3 mm. long; first glume 3-nerved, half as long and the spikelet; second glume 7-nerved, about as long as the lower lemma, which is sterile and 9-nerved, both well exceeding and enclosing the fertile lemma and palea.

Accepted Name:
Panicum capillare L.

Synonyms & Misapplications:
(none provided)
ssp. capillare – or common panicgrass, witchgrass
Additional Resources:

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

WA Flora Checklist: Panicum capillare checklist entry.

E-Flora BC: Panicum capillare atlas page.

CalPhotos: Panicum capillare photos.

USDA Plants: Panicum capillare information.

37 photographs:
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