| Porlieria angustifolia (Engelm.) A. Gray, 1852 |
| Sericodes A. Gray, 1852 |
| Sericodes greggii A. Gray, 1852 |
| Tribuloideae D.M. Porter ex Reveal, 2012 |
| Tribulus L., 1753 |
| Tribulus alacranensis Millsp., 1900 |
| Tribulus cistoides L., 1753 |
| Tribulus maximus L., 1753 |
| Tribulus maximus var. minor (Hook. f.) Oliv., 1868 |
| Tribulus pubescens G. Don, 1831 |
| Tribulus terrestris L., 1753 |
| Viscainoa Greene, 1888 |
| Viscainoa geniculata (Kellogg) Greene, 1888 |
| Viscainoa geniculata var. geniculata (Kellogg) Greene, 1888 |
| Viscainoa geniculata var. pinnata I.M. Johnst., 1922 |
| Viscainoa pinnata (I.M. Johnst.) Gentry, 1940 |
| Zygophyllaceae R. Br., 1814 |
| Zygophylloideae Arn., 1832 |
| Zygophyllum L., 1753 |