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The Portulacaceae is a widely-distributed family of rather succulent annual and perennial herbs. Plants in the family have bisexual flowers, usually rather showy, and with 2 sepals. The seeds of most species are smooth, shiny, and brown or black. Three genera are common in western Washington: Portulaca, Montia, and Claytonia (with the taxonomy of the last two genera rather confused). In addition, Lewisia columbiana occasionally occurs on outcrops in the Olympic and on the west side of Cascade mountains, but is more common east of the Cascade crest. Finally, Calandrinia ciliata, desert rock purslane or red maids, is occasionally encountered in open sites at low elevations that are moist in the spring. The Portulacaceae contains a few ornamental plants such as Portulaca grandiflora and Lewisia cotyledon.
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