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Gentianella
See list of 2 species in this genusReference: Gillett (1957).
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1a. Corolla 10–15 mm long, with a fringe of hairs on the inside around the base of the lobes; lobes of the corolla 3–5 mm long, obtuse to acute at the apex
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1b. Corolla 15–23 mm long, without a fringe at the base of the lobes; lobes of the corolla 4–7 mm long, acute to acuminate at the apex
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Each photo represents one species in this genus.