Calamagrostis canadensis bluejoint Poaceae CACA; Bx, pb; Q, j; R;

 

Calamagrostis canadensis.commons.wikipedia.org

Calamagrostis canadensis.commons.wikimedia.org (Accessed 4/2014).

Calamagrostis canadensis is a perennial C3 grass (Reich et al. 2003), to 1.5 m tall, aggressively colonial from rhizomes, stems clumped, often branched above, hairless. 

Leaves alternate, blades 0.4- 0.8 cm wide, rough on both sides, flat; ligules 0.3-0.8 cm long; 

Flower spikelets one-flowered, 0.2-0.6 cm long, jointed above glumes (glumes remain on inflorescence); glumes almost equal, lemma membranous, tip toothed, long-hairy at base, hairs about as long as lemma, awn arising from back of lemma; inflorescence dark gray to greenish, branched, open to somewhat dense, 8-25 cm long, often nodding, branches 3-8 cm long; blooms and fruits June-Aug. 

Wetland status: FACW+. 

Frequency in NYC: Apparently very infrequent.

Origin: Native. 

Habitat: Open, wet sites. 

Notes: Often planted in wetland restorations.