Avena sativa oats Poaceae AVSA*; Bx, pb; Q, j; R ar;

Avena sativa.USDA-NRCS PLANTS Database.Hitchcock, A.S. (rev. A. Chase). 1950. Manual of the grasses of the United States. USDA Miscellaneous Publication No. 200. Washington, DC

Avena sativa.USDA-NRCS PLANTS Database.Hitchcock, A.S. (rev. A. Chase). 1950. Manual of the grasses of the United States. USDA Miscellaneous Publication No. 200. Washington, DC (Accessed 5/2014).

Avena sativa  is an annual C3 grass (Pascal-Antoine 2008) to 1 m tall. 

Leaves alternate, ligules 0.2-0.6 cm membranous, blade rough, to slightly hairy, 0.3-1 cm wide. 

Flowers: Spiklets 2 flowered, nodding, axis smooth, glumes 2- 2.5 cm long, with 9-11 veins; lemma 1.5-2 cm, hard, sometimes awned, 2.5-3.5 cm long; inflorescence 10-25 cm or more, open, branches horizontal; blooming and fruiting July-Oct. 

Wetland status: UPL. 

Frequency in NYC: Very infrequent. 

Origin: Eurasia. 

Habitat: Disturbed sites. Sometimes introduced from hay bales at construction sites. Generally not persistent (Gargiullo personal observation).