Burke: Cynosurus echinatus vs. Poaceae tribe Poeae

	Cynosurus echinatus	Poaceae tribe Poeae
	bristly dog's-tail grass
Habit	Glabrous annual, the culms 2-5 dm. tall.
Leaves	Sheaths open, inflated; ligules 2-7 mm. long, obtuse; blades flat, 2-5 mm. broad, the margins freed from the sheath at different levels.
Flowers	Inflorescence a bristly, dense, ovoid panicle 1-4 cm. long; spikelets in pairs on very short branches, one spikelet fertile and sessile, the other short-pedicellate and sterile; sterile spikelet with several lemmas similar to the keeled, long-pointed glumes; fertile spikelet 2-flowered, the upper flower sometimes rudimentary; glumes strongly keeled and flattened, 5-6 mm. long, with awn tips 1-2.5 mm. long; lemmas somewhat lopsided, about 5 mm. long, rounded, with an awn 3-10 mm. long.

	Cynosurus echinatus	Poaceae tribe Poeae
Flowering time	May-July
Habitat	Disturbed open areas, including roadsides, grasslands, and wastelots.
Distribution	Occurring west of the Cascades crest in Washington; southwestern British Columbia 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	C. cristatus
Web links	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	Google search

Cynosurus echinatus

Poaceae tribe Poeae

bristly dog's-tail grass

Habit

Glabrous annual, the culms 2-5 dm. tall.

Leaves

Sheaths open, inflated;

ligules 2-7 mm. long, obtuse;

blades flat, 2-5 mm. broad, the margins freed from the sheath at different levels.

Flowers

Inflorescence a bristly, dense, ovoid panicle 1-4 cm. long;

spikelets in pairs on very short branches, one spikelet fertile and sessile, the other short-pedicellate and sterile; sterile spikelet with several lemmas similar to the keeled, long-pointed glumes; fertile spikelet 2-flowered, the upper flower sometimes rudimentary;

glumes strongly keeled and flattened, 5-6 mm. long, with awn tips 1-2.5 mm. long;

lemmas somewhat lopsided, about 5 mm. long, rounded, with an awn 3-10 mm. long.