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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.

Key to Linderniaceae

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1 Calyx conspicuously 5-winged (each calyx segment strongly keel-winged)
1 Calyx not winged.
..2 Flowers < 2 mm long.
....3 Leaves elliptic, cuneate at the base; calyx lobes even, all of the sinuses reaching nearly to the base of the calyx
....3 Leaves orbicular, rounded at the base; calyx lobes uneven, 3 of the sinuses extending about halfway to the base of the calyx, the lowermost sinus extending to the base
..2 Flowers > 4 mm long.
......4 Fertile stamens 4; calyx lobes connate at anthesis for > ½ their length, later separating
......4 Fertile stamens 2 (with 2 staminodia without anthers, or with rudimentary anthers); calyx lobes separate, or connate at base for < ¼ the length of the calyx.
........5 Capsule lanceoloid, > 8× as long as its diameter; calyx lobes connate at the base ca. ¼ the length of the calyx
........5 Capsule ovoid to ellipsoid, < 5× as long as its diameter; calyx lobes connate at the base ca. 1/8 the length of the calyx
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