| Astragalus guatemalensis var. guatemalensis Hemsl., 1879 |
| Astragalus guatemalensis var. lozani M.E. Jones, 1929 |
| Astragalus guatemalensis var. oaxacanus M.E. Jones, 1923 |
| Astragalus harbisonii Barneby, 1953 |
| Astragalus harshbergeri (Rydb.) A.E. Estrada, Villarreal & A. Delgado, 2020 |
| Astragalus hartmanii Rydb., 1929 |
| Astragalus hartwegii Benth., 1839 |
| Astragalus hartwegii f. pringlei Gand., 1902 |
| Astragalus harwoodii (Munz & McBurney) Abrams, 1944 |
| Astragalus helleri Fenzl, 1860 |
| Astragalus hidalgensis (Rydb.) Barneby, 1964 |
| Astragalus hidalgensis var. protensus Barneby, 1964 |
| Astragalus hintonii Barneby, 1964 |
| Astragalus hintonii var. cofrensis Barneby, 1964 |
| Astragalus hintonii var. hintonii Barneby, 1964 |
| Astragalus hookerianus D. Dietr., 1847 |
| Astragalus hornii A. Gray, 1868 |
| Astragalus hornii var. minutiflorus M.E. Jones, 1895 |
| Astragalus humboldtii A. Gray, 1864 |
| Astragalus humistratus A. Gray, 1853 |