Bidens beckii Torr.

• Authority

  Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

• Family

  Asteraceae

• Scientific Name

  Bidens beckii Torr. ex Spreng.

• Description

  Species Description - Aquatic perennial; lvs 2–4 cm, the submersed ones filiform- dissected, the emersed ones simple, lanceolate to ovate, sessile, serrate; heads terminal and solitary, the disk 1 cm wide; rays 1–1.5 cm; outer invol bracts more herbaceous and less striate than the rather similar inner ones; achenes subterete, 10–14 mm; pappus of 3–6 awns, longer than the achenes, retrorsely barbed above; 2n=26. In ponds and streams; Que. to N.J., w. to Man. and Mo.; disjunct in Oreg., Wash., and B.C. July–Oct. (Megalodonta b.)

• Common Names

  water beggar-ticks