Arrhenatherum elatius tall oatgrass Poaceae AREL2*; Bx, pb, wv; NY, iw; R, al, js;


Arrhenatherum (Accessed 5/2014).

Arrhenatherum elatius is a perennial C3 grass (Waller and Lewis 1979), to 2 m, tufted. 

Leaves alternate, blade 0.4-0.8 cm wide, flat, rough textured, dark dull green, ligules membranous, about 0.2 cm long, ragged. 

Flower spikelets 2-flowered, papery, lower flower male, upper flower fertile, glumes slightly unequal, to 1 cm long, lemma hairy at base, that of lower flower with an awn 1-2 cm long, bent sharply outwards from low on back, the upper floret not awned, narrowly elliptic; inflorescence 10-30 cm long, pale, at first contracted then narrowly open; blooming and fruiting May-June. 

Wetland status: FACU. 

Frequency in NYC: Infrequent. 

Origin: Eurasia. 

Habitat: Open areas, roadsides, meadows, disturbed sites.