Flora of the Southeastern United States
2022 Edition

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Key to Cuphea

Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

1 Leaves whorled (at least in part); pedicels 4-25 mm long; [pine flatwoods of FL Panhandle]
1 Leaves opposite (none whorled); pedicels 0-6 mm long; [collectively widespread].
..2 Floral tube 4-6 mm long, glabrous inside; stamens much shorter than the floral tube; petioles 0-2 mm long
..2 Floral tube 5.5-12 mm long, villous or finely puberulent inside; stamens equal to or exceeding the floral tube; petioles 0-15 (-20) mm long.
....3 Floral tube purple-green, 8-12 mm long, villous inside; stamens equal to or exceeding the floral tube; petioles (2-) 5-15 (-20) mm long; seeds 2.3-2.8 mm long
....3 Floral tube 5.5-8 (-9) mm long; petioles 0-2 mm long; seeds 1.5-22.0 mm long.
......4 Floral tube base rounded; seed margins rounded; [LA and TX]
......4 Floral tube base with descending spurs; seed margins flattened, thin; [s. FL]