CLASS XXII. ORDER II. 389 



Class XXII. DICECIA. Barren and fertile 



jlowers on different plants. 



Order II. DIANDRIA. Two stamens. 



401. Vallisnerta. Barren flowers, spa the two- 

 parted; spadix covered with florels; corolla three- 

 parted. Fertile flowers, spathe cloven, one flowered; 

 calyx three parted, superior; corolla three petalled; 

 stigma three parted ; capsule one celled. 



402. Salix. Calyx scale of an ament ; corolla 

 none. In the barren flowers, from one to five sta- 

 mens, with a nectariferous gland at the base. In the 

 fertile flowers, two stigmas; capsule one celled, two 

 valved ; seeds downy. 



Order III. TRIANDRIA. Three stamens. 



403. Empetrum. Calyx three parted; corolla three 

 petalled. Barren flowers, stamens from three to nine, 

 very long. Fertile flowers, styles from three to nine; 

 berry from three to nine seeded. 



Order l\. TETRANDRIA. Four stamens. 



404. Myrica. Calyx a concave scale of the ament ; 

 corolla none ; styles two ; berry one seeded. 



Order V. PENTANDRIA. Five stamens. 



40.5. HuMULus. Barren flowers, calyx five leaved ; 

 corolla none. Fertile flowers, calyx an oblique, en- 

 tire scale of an ament ; corolla none ; styles two ; seed 

 solitary, coated. 



406. AcNiDA. Barren flowers, calyx five leaved; 

 corolla none. Fertile flowers, calyx two leaved ; co- 

 33* 



