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Tagetes
See list of 3 species in this genus-
1a. Involucre 7–12 mm tall, composed of 3–5 involucral bracts; capitula with (1–) 3 ray flowers, the rays 1–2 mm long; disk corollas 3–4 mm long; cypsela body 4.5–7 mm long; pappus of 1 or 2 acuminate scales 2–3 mm long and 3–5 shorter, ovate to lanceolate scales 0.5–1 mm long
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1b. Involucre 13–19 mm tall, composed of 7–11 involucral bracts; capitula with 8 or more ray flowers, the rays 10–30 mm long; disk corollas 10–15 mm long; cypsela body 6.5–10 mm long; pappus of 1 or 2 acuminate scales 8–11 mm long and 2 or 3 blunt scales 3–6 mm long
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2a. Peduncles swollen; capitula 6–10 cm wide; corollas yellow or orange
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2b. Peduncles not or only scarcely swollen; capitula 3.5–6 cm wide; corollas partly or entirely red-orange
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Each photo represents one species in this genus.