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