Today's Botany Photo of the Day features Arabidopsis thaliana, also known as thale cress.
Arabidopsis is a famous model organism1 but it's not as familiar to most people as fruit flies or yeast. Check out the photographs to see what this plant looks like.
1. A "model organism" is an organism that's extensively studied by a large number of research labs. These species usually serve as representatives of larger taxa. In this case, Arabidopsis is a typical flowering plant.