| Hechtia fragilis Burt-Utley & Utley, 1987 |
| Hechtia galeottii Mez, 1919 |
| Hechtia gamopetala Mez, 1896 |
| Hechtia gayorum L.W. Lenz, 1995 |
| Hechtia ghiesbreghtii Lem., 1863 |
| Hechtia glabra Brandegee, 1920 |
| Hechtia glauca Burt-Utley & Utley, 1993 |
| Hechtia glomerata Zucc., 1843 |
| Hechtia guatemalensis Mez, 1906 |
| Hechtia gypsophila López-Ferr., Espejo & Hern.-Cárdenas, 2019 |
| Hechtia hernandez-sandovalii I. Ramírez, C.F. Jiménez & J. Treviño, 2013 |
| Hechtia hintoniana Burt-Utley, Utley & García-Mend., 2011 |
| Hechtia huamelulaensis I. Ramírez & Carnevali, 2014 |
| Hechtia ibugana Flores-Arg., Espejo & López-Ferr., 2019 |
| Hechtia iltisii Burt-Utley & Utley, 1993 |
| Hechtia integerrima M.B. Foster, 1968 |
| Hechtia isthmusiana Burt-Utley, 2012 |
| Hechtia ixtlanensis Burt-Utley, 2012 |
| Hechtia jaliscana L.B. Sm., 1964 |
| Hechtia kruseana Hern.-Cárdenas, Espejo & López-Ferr., 2023 |