Okay, I'll join in.
Here are my themes:
1. Out of this World - Space-themed plant varieties.
2. Indigenous Foods - Plants that have been (or are) grown by Native Americans.
3. Tea Garden - Plants you can use to make herbal (or other) tea.
4. Unusual Looks - Plants or fruits that have a color or shape you wouldn't expect!
5. Edible Flowers - Plants with flowers that are edible.
Q