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
- 31a – Leaf is triangular or diamond/wedge-shaped — go to 32
- 32a – Petiole is round — go to 33
- 31a – Leaf is triangular or diamond/wedge-shaped — go to 32
- 22e – All leaves unlobed — go to 31
- 19b – Thornless — go to 22
- 18a – Leaf simple — go to 19
Current Step
- 33a – Female catkin appears as a woody “cone” persistent year-round. Male catkin is papery and only present part of the year — Thinleaf Alder
- 33b – No woody, cone-like female catkin present. Papery catkins may be present — Birch
Resources
