Cowania mexicana D. Don | Purshia mexicana (D. Don) S. L. Welsh var. mexicana | | | Cowania mexicanaD. Don | Purshia mexicana(D. Don) S. L. Welsh var.mexicana |
Cowania stansburyana Torr. | Purshia mexicana (D. Don) S. L. Welsh var. stansburyana (Torr.) S. L. Welsh | | | Cowania stansburyanaTorr. | Purshia mexicana(D. Don) S. L. Welsh var.stansburyana (Torr.) S. L. Welsh |
Cowania mexicana D. Don var. stansburyana (Torr.) Jeps. | Purshia mexicana (D. Don) S. L. Welsh var. stansburyana (Torr.) S. L. Welsh | | i | Cowania mexicanaD. Don var.stansburyana (Torr.) Jeps. | Purshia mexicana(D. Don) S. L. Welsh var.stansburyana (Torr.) S. L. Welsh |
Cowania subintegra Kearney | Purshia ×subintegra (Kearney) Henrickson | | | Cowania subintegraKearney | Purshia subintegra(Kearney) Henrickson |
Cowania mexicana D. Don var. mexicana | Purshia mexicana (D. Don) S. L. Welsh var. mexicana | | i | Cowania mexicanaD. Don var.mexicana | Purshia mexicana(D. Don) S. L. Welsh var.mexicana |