Flora of the Hawaiian Islands
Dicotyledon Literature for Heterotheca grandiflora
Wagner et al., 1990, 1999.
   Asteraceae -- The Sunflower Family Bibliography
      Heterotheca grandiflora
General Information
DistributionNative from California to Arizona and Baja California, Mexico.In the Hawaiian Islands, naturalized on Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Kaho`olawe, Hawai`i.

Aromatic annual or biennial herbs; stems 5-20 dm long, stout and unbranched below the inflorescence, branched in the inflorescence, coarsely hirsute and glandular pubescent above.
Leaves ovate to oblong or oblanceolate, 2-8 cm long, 1-3.5 cm wide, densely villous to hirsute, margins coarsely serrate, lower ones on petioles 1-4 cm long, upper ones sessile and often with stipule-like lobes at base.
Heads several to numerous; involucre 7-9 mm high; ray florets 25-35 per head, rays 4-6 mm long; disk corollas ca. 4 mm long; pappus yellowish brown to reddish, the outer series inconspicuous.
Achenes 3-3.5 mm long, inner ones strongly flattened.
2n = 18