(77) 
II. Triandria. 
1. 
2. 
Salix.—Amentaceous. Perigonium 0. 
Shrub. Tree. 
Phoradendron.—Flowers immersed in 
the rachis of an articulate spike. 
Perigonium 3-lobed. Anthers 2-celled 
dehiscent by 2 pores. Berry globose, 
1-seeded. 
Arceuthobium.— é perigonium 3-lobed. 
@ 2dentate. Anthers l1-celled, dehis- 
cent by a slit. Berry compressed, 1- 
seeded. 
Atriplex.— ¢ perigonium 3-sepalous. 
@ 2-parted. Fruit a utricle. 
Amarantus.—Perigonium 3-parted. 
Fruit a capsule with circumscissile de- 
hiscence. 
Brizopyrum (Distichlis).—Glumaceous. 
Inferior glume o-nerved. 
Poa.—Glumaceous. Inferior glume 1- 
nerved. 
. Tetrandria, 
Urtica.—é flowers 4-sepalous. ? 
flowers 2-sepalous. Stigma penicillate. 
Negundo.—Perigonium depauperate, 4- 
cleft. Ovary 2-lobed, 2-celled. Fruit 
a 2-seeded samara. ‘Tree. 
Ptelea.—Calyx 4-5 sepalous. Petals 4. 
Fruit a 2-seeded samara. Tree, 
