Leaf blades 25-100(-150+) × 10-30(-60+) mm. Phyllaries linear (ultimately each convolute about a subtended cypsela), glabrous or hispid to setose. Cypselae: outer 10-15(-25) mm, inner 5-10 mm. 2n = 10.

Flowering May. Disturbed sites; 10-200 m; introduced; Calif.; Europe.