Leaf blades 5-75+ × 3-15(-20+) mm. Peduncles 5-3+ cm. Phyllaries: keels stramineous and thickened in fruit, abaxial faces scabrellous or glabrate. Cypselae 1.5-2+ mm. 2n = 18. Flowering Jun-Sep. Disturbed sites, sandy soils; 10-100 m; introduced; N.S., P.E.I.; Maine, Mich., N.H., N.Y., Ohio, Pa.; Europe.