| Nemastylis seleriana Loes., 1917 |
| Nemastylis silvestris Loes., 1919 |
| Nemastylis tenuis (Herb.) Benth. & Hook. f. ex S. Watson, 1883 |
| Nemastylis tenuis subsp. caerulescens (Greenm.) Ravenna, 1984 |
| Nemastylis tenuis subsp. pringlei (S. Watson) Goldblatt, 1975 |
| Nemastylis tenuis var. caerulescens (Greenm.) R.C. Foster, 1945 |
| Nemastylis tenuis var. nana (S. Watson) R.C. Foster, 1945 |
| Nemastylis tenuis var. pringlei (S. Watson) R.C. Foster, 1945 |
| Nemastylis tenuis var. purpusii R.C. Foster, 1945 |
| Nemastylis tenuis var. tenuis (Herb.) Benth. & Hook. f. ex S. Watson, 1883 |
| Nemastylis triflora Herb., 1842 |
| Nemastylis tuitensis (Aarón Rodr. & Ortiz-Cat.) Ravenna, 2007 |
| Nemastylis versicolor S. Watson, 1887 |
| Neomarica Sprague, 1928 |
| Neomarica gracilis (Herb.) Sprague, 1928 |
| Neomarica variegata (M. Martens & Galeotti) Henrich & Goldblatt, 1987 |
| Nivenioideae Schulze ex Goldblatt, 1990 |
| Oreolirion E.P. Bicknell, 1915 |
| Oreolirion arizonicum (Rothr.) E.P. Bicknell, 1915 |
| Oreolirion platyphyllum (S. Watson) E.P. Bicknell ex Prain, 1908 |