There are several plant genera with three letters in their Latin names. Here are a few examples:
- Allium: This genus includes onions, garlic, and leeks.
- Betula: This genus includes birch trees.
- Fabia: This genus includes beans, peas, and lentils.
- Iris: This genus includes irises.
- Rosa: This genus includes roses.
These are just a few examples, and there are many other three-letter plant genera. If you have any more information about the plant you’re thinking of, such as its appearance or where it grows, I may be able to narrow it down for you.