(75 ) 
C. Flowers incomplete not amentaceous. 
1. 
2. 
Amarantus.— Perigonium 3-5-sepalous. 
Fruit a circumscissile capsule. 
Atriplex.— 6 perigonium 5-sepalous. ? 
perigonium 2-parted. Stigmas 2. Fruit 
a compressed utricle. 
Ceratophyllum.— ¢ perigonium o-sepa- 
lous. Anthers sessile. Ovary of the 2 
flower 1-celled, l-ovulate. Fruit a nut- 
let with persistent style. Aquatic. 
Eremocarpus.— ¢ perigonium 5-6 part- 
ed. ¢ perigonium 0. Ovary 1-celled, 
l-ovulate. Fruit a 2-valved capsule. 
Xanthium.— 4 inflorescence: involucre 
o-phyllous, o-flowered. Perigonium 
5-dentate. ? inflorescence: involucre 
gamophyllous, 2-flowered. Fruit a pseu- 
docarp enclosed in the indurated invol- 
ucre. 
Ambrosia.— 4 inflorescence: involucre 
gamophyllus, o-flowered. 2 inflores- 
cence: involucre gamophyllus, 1-flow- 
ered. Spines of the involucre 1-seriate. 
Franseria.— 4 inflorescence: involucre 
gamophyllus, o-flowered. ¢ inflores-. 
cence: involucre gamoyhyllous, 1-4- 
flowered. Spines of the involucre o-se- 
riate. 
