| Hookera orcuttii Greene, 1886 |
| Hookera pauciflora (Torr.) Tidestr., 1925 |
| Laothoe Raf., 1837 |
| Laothoe parviflora (S. Watson) Greene, 1904 |
| Liliaceae Juss., 1789 |
| Lilieae Lam. & DC., 1806 |
| Lilioideae Eaton, 1836 |
| Lilium L., 1753 |
| Lilium bloomerianum Purdy, 1897 |
| Lilium canadense L., 1753 |
| Lilium canadense var. pardalinum (Kellogg) Bol., 1872 |
| Lilium candidum L., 1753 |
| Lilium humboldtii Roezl & Leichtlin ex Duch., 1871 |
| Lilium humboldtii var. bloomerianum Purdy, 1901 |
| Lilium longiflorum Thunb., 1794 |
| Lilium pardalinum Kellogg, 1860 |
| Lilium pardalinum var. parviflorum Eastw., 1902 |
| Lilium parryi S. Watson, 1876 |
| Lilium parryi var. kessleri Davidson, 1924 |
| Lilium roezlii Regel, 1870 |