Helianthus divaricatus L.

• 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

  Helianthus divaricatus L.

• Description

  Species Description - Fibrous-rooted perennial from long rhizomes; stems 0.5–1.5 m, glabrous below the infl, often glaucous; lvs all opposite, sessile or rarely on a short petiole to 5 mm, scabrous above, loosely hirsute or hispidulous (at least on the main veins) beneath, narrowly lanceolate to broadly lance- ovate, 5–18 × 1–5(–8) cm, broadest near the truncate or broadly rounded base, tapering to the slender, acuminate tip, shallowly toothed or subentire, trinerved near the base; heads 1–several at the tips of stiff cymose branches; disk yellow, 1–1.5 cm wide; invol bracts lance-acuminate or -attenuate, ciliolate, rather loose, often with reflexed tip; rays 8–15, 1.5–3 cm; 2n=34. Abundant in dry woods and other open places; widespread in e. U.S. and adj. Can., from Mass. and N.H. to Wis., s. to Fla., La., and e. Okla. July–Sept.

• Common Names

  divaricate sunflower