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Key to Phemeranthus

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1 Petals yellow or orange (to reddish or pinkish); flowers axillary, usually solitary (or in 2-3 flowered cymules)
1 Petals pink or purple; flowers in a diffuse cyme borne on a scapelike peduncle.
..2 Seeds rough and wrinkled; [local, midwestern]
..2 Seeds smooth to slightly rough and not wrinkled; [collectively widespread].
....3 Stamens 4-8; flowers open in late afternoon
....3 Stamens 12-80 (-90); flowers variously open from early to late afternoon.
......4 Stamens (40-) 50-80 (-90); [of granite and sandstone from SC southward]
......4 Stamens 12-42; [collectively widespread].
........5 Style 2-3.5 mm long, shorter than or about the same length as the stamens; stamens 12-30; flowers open from 3 to 7 p.m. (Daylight Savings Time)
........5 Style 3.8-7+ mm long; stamens 25-45; flowers open from about 1 to 7 p.m. (Daylight Savings Time).
..........6 Sepals 4-6 mm long; petals 10-15 mm long
..........6 Sepals 3-4 mm long; petals 8-10 mm long.
............ 7 Stigma distinctly 3-lobed; mature seeds covered with a dull gray coating; flowers opening 3 to 7 p.m. (Daylight Savings Time); [of calcareous rock outcrops from Tennessee south and westward]
............ 7 Stigma subcapitate; mature seeds brown-black and lustrous; flowers open from about 1 to 7 p.m. (Daylight Savings Time); [of mafic rocks in ne. NC and se. VA]
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