LINNASAN KEY. 
MONANDRIA. 
I, Monogynia. 
1. Aczna.—Calyx lobes valvate. Style ter- 
minal. Akene enclosed in the calyx. 
2. Hippuris.—Calyx superior. Aquatic. 
I. Digyni>, Trigynia and Tetragynia. 
1. Aczena.—Calyx lobes valvate. Akenes 
enclosed in the calyx. Styles of akenes 
terminal. 
2. Callitriche.—Fruit a 4-coccous schizo- 
carp. Aquatic. 
3. Chenopodium.—Perigonium 3-5-parted. 
Fruit a utricle enclosed in the persistent 
perigonium. 
Festuca.—Glumaceous. 
Cyperus.—Glumaceous, trigynous. 
DIANDRIA. 
oo 
I, Monogynia. 
A. Floral parts incomplete, inferior. 
1. Salicornia.—Perigonium gamosepalous, 
opening by a slit and immersed in an ex- 
cavation of the rachis. 
