- Height: Taller than 1 meter (go to 2) – Less than 1 meter (go to 3)
- Trunk: Has a trunk with bark and needle-bearing branches – Plant 1
- Flowers: Presence of flowers (go to 4) – Absence of flowers; stem with fibrous hairs and whorled leaves – Plant 4
- Petals: 4 petals (go to 5) – 6 petals (go to 6)
- Leaves: Alternate pattern, voluminous at base; oblong sepals; 6 stamens – Plant 2
- Stamen: Multiple stamens; fanned leaves at stem top; hairlike fruit – Plant 3