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Whitemargin Sandmat

Euphorbia albomarginata (species)

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Euphorbia albomarginata (formerly Chamaesyce albomarginata), whitemargin sandmat or rattlesnake weed, is a small low-growing perennial, in the spurge family (Euphorbia, Euphorbiaceae) native to desert, chaparral, and grassland habitats of southwestern North America, from southern and central California to Northern Mexico and Louisiana. It can be easily identified by its small size, dusty green leaves, very flattened growth pattern, and the white circular margin around the edge of its burgundy centered flowers. It is the only member of the former Chamaesyce genus that is native to the Santa Monica Mountains, although four invasive species have been introduced there, and lack a white margin on the flower. As with other typical members of the Euphorbia family, it has a white milky sap, and is…

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Range Maps show field notes recorded by Natural Atlas contributors and other datasets via GBIF.org

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