Plant dichotomous key
A. Plant has no flowers (Plant 1)
A’. Plant has flowers
B. Plant has no petals (Plant 4)
B’. Plant has petals
C. Plant has white flowers (Plant 2)
C’. Plant has purple flowers (Plant 3)
Chelsea, I like your dichotomous key. It is very straight forward, clear and easy to follow. However, I think plant 1 has flowers, too.