| Crassulaceae | |
Sedum stenopetalum subsp. ciliosum
| (Howell) R.T. Clausen | J. Cact. Succ. Soc. Amer. 20(10): 144 | 1948 |
| Crassulaceae | |
Sedum stenopetalum subsp. monanthum
| (Suksd.) R.T. Clausen | Sedum N. Amer. 276 | 1975 |
| Crassulaceae | |
Sedum stenopetalum var. monanthum
| (Suksd.) H. Ohba | J. Bot. Res. Inst. Texas 1(2): 890 | 2007 |
| Crassulaceae | |
Sedum stenopetalum subsp. nesioticum
| (G.N. Jones) R.T. Clausen | J. Cact. Succ. Soc. Amer. 18(5): 77 | 1946 |
| Crassulaceae | |
Sedum stenopetalum subsp. radiatum
| (S. Watson) R.T. Clausen | J. Cact. Succ. Soc. Amer. 20(10): 144 | 1948 |
| Crassulaceae | |
Sedum stenopetalum fo. rubrolineatum
| Cockerell | Bull. Torrey Bot. Club 18: 169 | 1891 |
| Crassulaceae | |
Sedum stenopetalum subsp. stenopetalum
| | | |
| Crassulaceae | |
Sedum stenopetalum var. stenopetalum
| | | |
| Crassulaceae | |
Sedum stenopetalum var. subalpinum
| Fröd. | Acta Horti Gothob. 10(App.): 70, f. 521–527, pl. 43, f. 2 | 1935 [1936] |
| Crassulaceae | ** |
Sedum stenopetalum subsp. typicum
| R.T. Clausen | Cact. Succ. J. (Los Angeles) 20(10): 144 | 1948 |