A. Plant with needle-like leaves: Plant 1
A. Plant with diverse form leaves: See B
B. Flowers in catkins: Plant 4
B. Flowers not in catkins: See C
C. Flowers are purplish: Plant 3
C. Flowers are white: Plant 2
A. Plant with needle-like leaves: Plant 1
A. Plant with diverse form leaves: See B
B. Flowers in catkins: Plant 4
B. Flowers not in catkins: See C
C. Flowers are purplish: Plant 3
C. Flowers are white: Plant 2