| Agrostis maritima Lam., 1783 |
| Agrostis matrella L., 1771 |
| Agrostis mertensii Trin., 1836 |
| Agrostis mexicana L., 1767 |
| Agrostis michauxii Trin., 1824 |
| Agrostis michauxii var. laxiflora (Michx.) A. Gray, 1834 |
| Agrostis microcarpa hort. ex Steud., 1840 |
| Agrostis microphylla Steud., 1854 |
| Agrostis microphylla var. intermedia Beetle, 1945 |
| Agrostis microsperma Lag., 1816 |
| Agrostis minutissima Steud., 1854 |
| Agrostis monostachya Poir., 1810 |
| Agrostis multiculmis Vasey ex Beal, 1896 |
| Agrostis mutabilis Knapp, 1804 |
| Agrostis nemoralis Phil., 1859 |
| Agrostis novae-angliae Tuck., 1843 |
| Agrostis noveboracensis Spreng., 1825 |
| Agrostis novogaliciana McVaugh, 1983 |
| Agrostis nutans Spreng., 1825 |
| Agrostis obtusata Steud., 1840 |