(75) 



C. Floiuers incomplete not amentaceous. 



1. Amarantus. — Perigoninm 3-5-sepalous. 

 Fruit a circumscissiie capsule. 



2. Atriplex. — 5 perigonium 5-sepalous. $ 

 perigonium 2-parted. Stigmas 2. Fruit 

 a compressed utricle. 



3. Ceratoplijllum. — $> perigonium oo-sepa- 

 lous. Antliers sessile. Ovary of the ? 

 flower 1-celled, 1-ovulate. Fruit a nut- 

 let with persistent style. Aquatic. 



4. Eremocarpus. — 5 perigonium ^-Q part- 

 ed. ? perigonium 0. Ovary 1-celled, 

 1-ovulate. Fruit a 2-valved capsule. 



5. Xanthium. — 5 inflorescence: involucre 



oo-phyllous, oo-flowered. Perigonium 

 5-dentate. ? inflorescence: involucre 

 gamophyllous, 2-flowered. Fruit a pseu- 

 docarp enclosed in the indurated invol- 

 ucre. 



6. Ambrosia. — c5 inflorescence: involucre 

 gamophyllus, co-flowered. ? inflores- 

 cence: involucre gamophyllus, 1-flow- 

 ered. Spines of the involucre 1 -seriate. 



7. Franseria. — 5 inflorescence : involucre 

 gamophyllus, co-flowered. ? inflores- 

 cence: involucre gamoyhyllous, 1-4- 

 flowered. Spines of the involucre oo-se- 

 riate. 



