Class XXIII. Order I. 



Class XXIII. POLYGAMIA. Perfect flowers 

 together with barren., or fertile,, or bothy on the 

 same or distinct plants. 



Order I. MONCECM. Barren, fertile, and 



perfect flowers, found on one plant. 



ANDROPOGON. In the perfect flowers ca- 

 lyx, glume one flowered ; corolla, glume awned at 

 the base ; stamens three ; styles three ; seed one. 

 In the barren flowers, calyx awnless ; stamens 

 three. 



278. HOLCUS. Perfect flowers, calyx glume 

 one or two flowered ; corolla, glume awned ; sta- 

 mens three ; styles two ; seed one. Barren flow- 

 ers, calyx two valved ; corolla none ; stamens 

 three. 



379. ATRIPLEX. Perfect flowers, calyx five 

 parted ; corolla none ; stamens five ; style two 

 parted ; seed one depressed. Fertile flowers, ca- 

 lyx two leaved ; corolla none ; style two parted ; 

 seed one compressed. 



280. VERATRUM. Calyx none ; corolla six 

 parted ; stamens six. Perfect flowers, pistils three ; 

 capsules three ; many seeded. Barren flowers con- 

 taining the rudiment of a pistil. 



281. ACER. Calyx five cleft ; corolla five pe- 

 talled ; stamens eight ; capsules two or three, one 

 seeded, terminated by a wing. Barren flowers 

 without germ or style. 



