A1. Is the plant woody? Bin 1
A2 Is the plant herbaceous? Go to B
B1 Does it have a single flower? Bin 3
B2 Does it show inflorescence? Go to C
C1 Does it have visible petals? Bin 2
C2 Does it not have visible petals? Bin 4
A1. Is the plant woody? Bin 1
A2 Is the plant herbaceous? Go to B
B1 Does it have a single flower? Bin 3
B2 Does it show inflorescence? Go to C
C1 Does it have visible petals? Bin 2
C2 Does it not have visible petals? Bin 4
I really like your choice of attributes, and think that your key works great. I hadn’t thought of your initial distinction between woody and herbaceous plants, and I like that you didn’t choose the color of the petals as a choice and still came up with a great key.