Violaceae

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  Hybanthus

  1a. Sepals lacking basal auricles; corolla green-white; stamens connate, forming a sheath that surrounds the carpels, none of them appendaged; leafy-stemmed plants 30–90 (–100) cm tall [Fig. 928]
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  Viola

  1b. Sepals with basal auricles; corolla white, yellow, blue to purple, or multicolored (but not green-white); stamens connivent but not fused, the two lower ones with appendages that are prolonged backwards into the nectary spur; scapose or leafy-stemmed plants 2–45 cm tall [Figs. 933,935,936]

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