D. Trunk built of leaning relays, each sprouting from where its predecessor bends
1. Champagnat: Relays ascending or upturned at tip, supporting spiral or decussate leaves
2. Leafy twigs horizontal, at least at tip, leaves distichous
a. Troll: Branch leans smoothly over to cast a horizontal spray of foliage; successor sprouts
from the bend
b. Mangenot: Each erect trunk relay turns sharply to form a horizontal branch with
distichous leaves; succeeding relay sprouts from the corner to repeat the process