| Lepanthopsis floripecten (Rchb. f.) Ames, 1933 |
| Lepanthopsis unilateralis (Cogn.) Porto & Brade, 1935 |
| Leptorchis Thouars, 1822 |
| Leptorchis elata (Lindl.) Kuntze, 1891 |
| Leptorchis wendlandii (Rchb. f.) Kuntze, 1891 |
| Leucohyle Klotzsch, 1855 |
| Leucohyle subulata (Sw.) Schltr., 1914 |
| Leucohyle warscewiczii Klotzsch, 1863 |
| Lichterveldia Lem., 1855 |
| Lichterveldia lindleyi Lem., 1855 |
| Lichterveldia lindleyi var. rosella Lem., 1855 |
| Ligeophila Garay, 1977 |
| Ligeophila clavigera (Rchb. f.) Garay, 1977 |
| Limnorchis Rydb., 1900 |
| Limnorchis brevifolia (Greene) Rydb., 1901 |
| Limnorchis thurberi (A. Gray) Rydb., 1901 |
| Limodorum Boehm., 1760 |
| Limodorum altum L., 1767 |
| Limodorum campanulatum (Lex.) Ames & C. Schweinf., 1930 |
| Limodorum floridum Salisb., 1796 |