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Key to Turnera

Turneraceae

Turnera

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1 Flowers with a contrasting darkened central color (discolorous); [waif]
1 Flowers lacking a conspicuous darkened central color (or if darkened, concolorous); [native or non-native]
  2 Petioles lacking nectaries; [s. TX]
  2 Petioles with nectaries; [s. TX or FL]
    3 Petals white to purple; [s. TX]
    3 Petals bright yellow; [c. and s. FL]