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Helenium
See list of 3 species in this genus-
1a. Leaves not decurrent on stems and branches, the blades linear to linear-filiform, 1–2 (–4) mm wide; plants annual, from taproots
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1b. Leaves decurrent on stems and branches, the blades broad-linear to oblanceolate, elliptic, or narrow-ovate, 5–40 mm wide; plants perennial, from fibrous roots
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2a. Ray flowers carpellate, numbering mostly 13–21 per capitulum [Fig. 416]; disk flowers yellow; larger leaf blades coarsely toothed
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2b. Ray flowers neutral, numbering mostly 8–13 per capitulum, rarely absent; disk flowers red-brown to purple-brown; leaf blades entire or subentire
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Each photo represents one species in this genus.