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Cosmos
See list of 3 species in this genus-
1a. Ultimate segments of leaf blades lanceolate to elliptic, 2–5 mm wide; rays pale to bright yellow; cypsela body 15–30 mm long including beak
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1b. Ultimate segments of leaf blades linear to filiform, narrower than 1.5 mm; rays usually white to pink to red; cypsela body 7–16 mm long including beak
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2a. Rays 15–40 mm long; margins of ultimate leaf segments entire
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2b. Rays 5–15 mm long; margins of ultimate leaf segments spinulose-ciliate
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Each photo represents one species in this genus.