Burke: Setaria parviflora vs. Setaria verticillata

	Setaria parviflora	Setaria verticillata
		hooked bristlegrass, rough bristlegrass
Habit		Annual, the culms 3-10 dm. tall, hollow, ascending to erect, usually freely branched from the base.
Leaves		Sheaths open, pubescent at the throat; ligules about 1.5 mm. long, the outer half a fringe; blades flat, 4-10 mm. broad, scabrous-margined.
Flowers		Inflorescence a cylindric, congested, erect panicle 5-10 cm. long; spikelets articulate below the glumes, sub-terete, 2-flowered, each subtended by a bristle 4-7 mm. long, retrorsely finely barbed; spikelets 2-2.5 mm. long; first glume 3-veined, half as along as the second; second glume 5-nerved, about equal to the lemma; lower flower sterile, the lemma acute, the narrow palea about half its length; upper flower perfect, the lemma leathery, enclosing the palea; anthers dark purple.

	Setaria parviflora	Setaria verticillata
Flowering time		July-September
Habitat		Weed of gardens, irrigated areas and wasteland.
Distribution	[WildflowerSearch map] [BONAP county map]	Occurring chiefly east of the Cascades crest in Washington; British Columbia to Alaska, east across North America to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]
Origin		Introduced from Europe
Conservation status		Not of concern
Sibling taxa	S. faberi, S. italica, S. pumila, S. verticillata, S. viridis	S. faberi, S. italica, S. pumila, S. 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 verticillata

hooked bristlegrass, rough bristlegrass

Habit

Annual, the culms 3-10 dm. tall, hollow, ascending to erect, usually freely branched from the base.

Leaves

Sheaths open, pubescent at the throat;

ligules about 1.5 mm. long, the outer half a fringe;

blades flat, 4-10 mm. broad, scabrous-margined.

Flowers

Inflorescence a cylindric, congested, erect panicle 5-10 cm. long;

spikelets articulate below the glumes, sub-terete, 2-flowered, each subtended by a bristle 4-7 mm. long, retrorsely finely barbed;

spikelets 2-2.5 mm. long; first glume 3-veined, half as along as the second; second glume 5-nerved, about equal to the lemma; lower flower sterile, the lemma acute, the narrow palea about half its length; upper flower perfect, the lemma leathery, enclosing the palea;

anthers dark purple.