| Name |
Pronunciation |
Meaning |
| Lawsonia | | named for Isaac Lawson, an 18th century Scottish army doctor |
| Ledodendron | | a hybrid combination of Rhododendron (Greek for rose-tree) and Ledum (a name for Cistus) |
| Ledum | | from the Greek ledon (cistus) |
| Leea | | named for James Lee (1715-1795), an English nurseryman |
| Legousia | | from an unknown derivation |
| Leiophyllum | | from the Greek leios (smooth) and phyllon (leaf); the leaves are smooth and glossy |
| Leitneria | | named for Edward F. Leitner, a 19th century German physician and naturalist |
| Leschenaultia | | named for Louis Theodore Leschenault de la Tour (1773-1826), a French botanist and traveller |
| Leucadendron | | from the Greek leukos (white) and dendron (tree); for the white foliage |
| Leucanthemella | | a diminutive (little) form of the genus Leucanthemum |
| Leucanthemopsis | | resembles the genus Leucanthemum |
| Leuchtenbergia | | named for Prince Maximillian E.Y.N. von Beauharnais (1817-1852), the Duke of Leucthenberg |
| Leucocoryne | | from the Greek leukos (white) and koryne (club); for the white staminodes |
| Odontioda | | a hybrid combination of Odontoglossum (toothed-tongue) and Cochlioda (like a snail shell) |
| Odontocidium | | a hybrid combination of Odontoglossum (toothed-tongue) and Oncidium (from the Greek word for tumor) |
