Previous Steps
- 1b – Alternate leaf arrangement on stem — go to 18
- 18a – Leaf simple — go to 19
- 19b – Thornless — go to 22
- 22e – All leaves unlobed — go to 31
- 19b – Thornless — go to 22
- 18a – Leaf simple — go to 19
Current Step
- 40a – Leaf base asymmetrical — go to 41
- 40b – Leaf base symmetrical — go to 43
Resources