Poa compressa Canada bluegrass Poaceae POCO2*; Bx, pb, sd, sl; NY, ct, rr; Q, fr, j, ri, tl; K, p; R, d, fk, lp, se;

Dipartimento di Scienze della Vita, Università di Trieste - Progetto Dryades - Picture by Andrea Moro - Comune di Cormons, centro cittadino., GO, FVG, Italia, - Image licensed under a Creative Commons Attribution Non Commercial Share-Alike 3.0 License

Poa compressa.Andrea Moro.Creative Commons.luirig.altervista org (Accessed 6/2014).

Poa compressa is a perennial C3 grass (Waller and Lewis 1979), erect, to 70 cm from long rhizomes, (not tufted), stems often appearing evenly spaced, sharply flattened, 2-edged, especially near top, stems leafy, somewhat dull, blue-green (Gargiullo pers. obs.); late summer-fall basal leaves dark green, elongate (ca 45 cm long).

Leaves alternate, 0.2-0.4 cm wide, stem leaves mostly 10 cm long or less, often held almost horizontally, appearing ranked, leaf tips boat-shaped, ligules membranous, short, 0.1-0.2 cm.

Flower spikelets 0.4-0.6 cm, 3-6 florets, glumes about 0.2 cm, keeled, often with webby hairs inside; inflorescence 2-8 cm long, dense, compact, grayish-green, branches paired, bearing spikelets to near base of branches, May-June. Plants and seeds eaten by birds and mammals (Martin et al. 1951).

Wetland status: FACU.

Frequency in NYC: Occasional.

Origin: Europe.

Habitat: An escaped lawn grass. Common in lawns, open areas, meadows, roadsides, dry soil, pH 5-7. Tolerant of shade, moderately tolerant of drought, intolerant of fire, salt (USDA, NRCS 2010).