(8) 
TRIANDRIA. 
I, Monogynia, 
A. Floral parts complete, superior. 
1. Plectritis—lLimb of calyx obsolete. Co- 
rolla gamopetalous, calcarate. 
B. Floral parts complete, inferior. 
1. Montia.—Calyx 2-sepalous. Corolla cleft 
on one side, 5-parted. 
C. Floral parts incomplete. 
a. Perigonium petaloid. 
1. Iris.—Perigonium 6-parted, superior, 
alternate lobes reflexed. 
2. Scoliopus.— Perigonium 6-sepalous infe- 
rior, alternate lobes reflexed. 
3. Brodiza. —Perigonium 6-parted. infe- 
rior. Stamens alternating with stamino- 
dia. 
b. Perigonium herbaceous. . 
1. Aczna.—Calyx lobes valvate, tube spi- 
nose. Fruit an akene enclosed in the 
calyx. Style terminal. 
2. Chenopodium.—Perigonium 3-5-parted, 
not appendiculate. Fruit a compressed 
utricle enclosed in the perigonium. 
