| Piqueria laxiflora B.L. Rob. & Seaton, 1893 |
| Piqueria pilosa Kunth, 1820 |
| Piqueria pilosa var. pilosa Kunth, 1820 |
| Piqueria pilosa var. pringlei (B.L. Rob. & Seaton) B.L. Rob., 1906 |
| Piqueria pringlei B.L. Rob. & Seaton, 1893 |
| Piqueria pyramidalis B.L. Rob., 1901 |
| Piqueria serrata A. Gray, 1880 |
| Piqueria serrata var. angustifolia B.L. Rob. & Greenm., 1895 |
| Piqueria serrata var. serrata A. Gray, 1880 |
| Piqueria standleyi B.L. Rob., 1934 |
| Piqueria triflora Hemsl., 1881 |
| Piqueria trinervia Cav., 1795 |
| Piqueriinae Benth., 1873 |
| Piqueriopsis R.M. King, 1965 |
| Piqueriopsis michoacana R.M. King, 1965 |
| Pittocaulon H. Rob. & Brettell, 1973 |
| Pittocaulon bombycophole (Bullock) H. Rob. & Brettell, 1973 |
| Pittocaulon calzadanum B.L. Turner, 1996 |
| Pittocaulon filare (McVaugh) H. Rob. & Brettell, 1973 |
| Pittocaulon hintonii H. Rob. & Brettell, 1973 |