(73) 
4, Phoradendron.—Flowers immersed in the 
rachis of articulate spikes. Perigonium 
3-lobed. Ovary inferior. Fruit a berry. 
Parasitic. 
5. Megarrhiza.—Flowers complete. ¢ flow- 
ers in racemes, 2 flower solitary in the 
axilla of the 6 raceme. 
IV. Tetrandria. 
A. Flowers complete. 
1. Ptelea.—Calyx 4-parted. Petals 4. Stam- 
ens alternate with the petals. Fruita 
2-seeded samara. Shrub. Tree. 
B. Flowers perigoniate in 6 and ¢ : 
1. Urtica.—¢ perigonium 2-sepalous. 
2. Hesperocnide.— ? perigonium gamosepa- 
lous. 
C.. Perigonium 0, or only present in one sex. 
1. Cupressus.— é flowers: anthers attached 
to a peltate bract. Cone globose. Seeds 
angulate, narrowly winged. Leaves op- 
posite. Coniferous. 
2. Libocedrus.— 4 flowers: anthers attached 
to a peltate bract. Cone oblong. Wings 
of the seed unequal. Leaves opposite. 
Coniferous. 
4 
