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Ageratum
See list of 2 species in this genus-
1a. Peduncles pubescent, in part, with glandular hairs; involucral bracts narrow-lanceolate, gradually tapering to an awn-like point 0.8–2 mm long, the abaxial surface stipitate-glandular, eciliate or sparsely ciliate on the margins
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1b. Peduncles pubescent with eglandular hairs; involucral bracts oblong-lanceolate, abruptly tapering to an awn-like point 0.5–1 mm long, the abaxial surface eglandular, ciliate on the margins
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Each photo represents one species in this genus.