Corrugate-seeded Spurge, Ribseed Sandmat, Rib-seed Sandmat, Ridge-seeded Spurge: Chamaesyce glyptosperma (Synonym: Euphorbia glyptosperma) -
Milk Spurge, Spotted Sandmat, Spotted Spurge: Chamaesyce maculata (Synonyms: Chamaesyce maculata, Chamaesyce mathewsii, Chamaesyce supina, Chamaesyce tracyi, Euphorbia maculata, Euphorbia supina) -
Thymeleaf Sandmat, Thyme-leaf Spurge, Thyme-leaved Spurge: Chamaesyce serpyllifolia (Synonyms: Chamaesyce albicaulis, Chamaesyce neomexicana, Chamaesyce serpyllifolia ssp. serpyllifolia, Euphorbia neomexicana, Euphorbia serpyllifolia) -