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10b. Portulaca umbraticola Kunth subsp. lanceolata J. F. Matthews & Ketron, Castanea. 56: 304. 1991.
Portulaca lanceolata Engelmann, Boston J. Nat. Hist. 6: 154. 1850, not Haworth 1803
Flowers 8-15 mm diam.; petals yellow tipped with red (copper). 2n = 54.
Flowering late spring-early fall. Granitic and sandstone outcrops, dry, sandy soil, cultivated fields; 0-200 m; Ariz., Ark., La., Miss., Mo., N.Mex., Okla., Tex.
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