Burke: Setaria parviflora vs. Setaria viridis

	Setaria parviflora	Setaria viridis

Habit		Annual, the culms erect to decumbent, up to 1 m. tall.
Leaves		Sheaths open; ligules nearly 2 mm. long; blades flat, mostly glabrous, 4-8 mm. broad.
Flowers		Inflorescence a cylindric, congested panicle up to 10 cm. long; spikelets articulate below the glumes, 2-flowered, each subtended by 2-3 bristles; the upper, fertile lemma and palea enclosed by the second glume and lower, sterile lemma.
Fruits		Utricle

	Setaria parviflora	Setaria viridis
Flowering time		June-October
Habitat		Fields, roadsides, wastelots, and other disturbed areas.
Distribution	[WildflowerSearch map] [BONAP county map]	Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]
Origin		Introduced from Eurasia
Conservation status		Not of concern
Sibling taxa	S. faberi, S. italica, S. pumila, S. verticillata, S. viridis	S. faberi, S. italica, S. pumila, S. verticillata
Subordinate taxa		S. viridis var. viridis
Web links	Local floras: CA, OR Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Setaria parviflora

Setaria viridis

Habit

Annual, the culms erect to decumbent, up to 1 m. tall.

Leaves

Sheaths open;

ligules nearly 2 mm. long;

blades flat, mostly glabrous, 4-8 mm. broad.

Flowers

Inflorescence a cylindric, congested panicle up to 10 cm. long;

spikelets articulate below the glumes, 2-flowered, each subtended by 2-3 bristles; the upper, fertile lemma and palea enclosed by the second glume and lower, sterile lemma.

Fruits

Utricle