| Pectis schottii (Fernald) Millsp. & Chase, 1904 |
| Pectis sinaloensis Fernald, 1897 |
| Pectis sinaloensis var. lancifolia Greenm., 1904 |
| Pectis sinaloensis var. sinaloensis Fernald, 1897 |
| Pectis stenophylla A. Gray, 1886 |
| Pectis stenophylla var. biaristata (Rydb.) D.J. Keil, 1977 |
| Pectis stenophylla var. gentryi D.J. Keil, 1977 |
| Pectis stenophylla var. puberula (Greenm.) D.J. Keil, 1977 |
| Pectis stenophylla var. rosei (Fernald) D.J. Keil, 1977 |
| Pectis stenophylla var. stenophylla A. Gray, 1886 |
| Pectis swartziana Less., 1831 |
| Pectis taliscana Hook. & Arn., 1838 |
| Pectis taxifolia Greene, 1905 |
| Pectis tenella DC., 1836 |
| Pectis tenuicaulis Urb., 1899 |
| Pectis uniaristata DC., 1836 |
| Pectis uniaristata var. holostemma A. Gray, 1883 |
| Pectis uniaristata var. jangadensis (S. Moore) D.J. Keil, 1977 |
| Pectis uniaristata var. uniaristata DC., 1836 |
| Pectis urceolata (Fernald) Rydb., 1916 |