Aira caryophyllea silver hairgrass Poaceae AICA*; Bx, pb; NY, bl;

aira-caryophyllea-trevor-jameshamilton-new-zealand-2004-cabi-org

Aira caryophyllea.Trevor James Hamilton.New Zealand.2004.www.cabi.org (Accessed 10/2016).

Aira caryophyllea is an annual C3 grass (Pascal-Antoine 2008), 10-30 cm tall, stems very slender, nodes 2-3. 

Leaves alternate, mostly basal, blade 0.5-5 cm long, to 0.1 cm wide, filamentous, edges rolled inward, sheaths and blade rough-textured, short; ligule membranous, ragged, 0.2-0.5 cm long. 

Aira caryophyllea. florets. By Steve Matson. Copyright © 2017 Steve Matson. . CalPhotos - calphotos.berkeley.edu/flora/

Aira caryophyllea. florets. By Steve Matson. Copyright © 2017 Steve Matson. . CalPhotos – calphotos.berkeley.edu/flora/ (Accessed 7/2017).

Flower spikelets 2-flowered, silvery in bloom, the stalk 1-2 times as long as the spikelet, glumes about 0.3 cm long, lemmas about 0.2 cm long, tips 2-toothed, both awned from below middle, awns about 0.3 cm long, bent, lower part wider and shorter than upper part; inflorescence branched, open, 1-12 cm long, 3-10 cm wide, silvery-shiny, becoming whitish in age (Clayton et al. 2002+); blooming and fruiting May-July. 

Wetland status: NL. 

Aira caryophyllea (common silver hairgrass). © Biopix/ JC Schou. SEiNet. Copyright- http-//creativecommons.org

Aira caryophyllea (common silver hairgrass). © Biopix/ JC Schou. SEiNet. Copyright- http-//creativecommons.org (Accessed 7/2017).

Frequency in NYC: Very infrequent. 

Origin: Europe. 

Habitat: Dry, open soil.