CLASSES, &c. AND GENERA ARRANGED, cxxix 



Class XXI. MONOECIA. Stamens and Pistils in 

 separate flowers, on the same plant. 



Order I. MONANDRIA. 1 Stamen. 



Eupho'rbia, Spurge. Involucre of one piece, with several stamen- 

 bearing (barren) flowers, and one pistil-bearing (fertile) flower. 



Stamen-bearing flower. Cal. none. Con none. 



Pistil-hearing f(,ower . A single pistil. Cal. none, (or rarely any.) 

 Cor. none. Germ, three-lobed. Styles three, cloven. Caps' 

 three-seeded. N. O. Euphorbiacese. J,— Page 261. 



Zanniche'llia, Horned-pondmeed. Involucre none. 



Stamen-hearing flower. Cal. and Cor. none. 



Pistil-hearing flower. Cal. one-leaved. Cor. none. Germ. fouTj 

 or more. Caps, [seeds) four, nearly stalkless. Stig. target- 

 shaped, (peltate.) N. O. Fluviales. Vent, 



Callitriche, and Chara? See Monandria, — Page 263, 



(DIANDRIA. 2 Stamens.) 

 Carex. See in Order II. 



Order II. TRIANDRIA. 3 Stamens^ 



■Sparga'nium, Bur-reed. Fl. in spherical, close heads. 



Stamen-hearing flower. Cal. three-leaved. 



Pistil-hearing flower. Cal. three-leaved. Cor. none. Drupe 



(stone-fruit) dry, one-seeded. N, O. Typhaceee. J. — Page 



264. 

 Carex, Sedge. Fl. collected into a tiled spike, herbage grassy^ 

 Stamen-bearing flower. Cal. a scale. Cor. none. 

 Pistil-bearing flower. Cal. a scale. Cor. a hollow, permanent 



glume (husk,) clothing the loose seed. Fruit-nut three-cornered. 



N. O. Cyperacese. J, — Page 265. 

 Typha, Reed-mace. FL collected into very close, cylindric spikes 



or catkins 

 ■Stamen-hearing flower. Cal. none. Cor. none. " Stam. three 



together upon a chaffy, or hairy receptacle, united below into 



one filament." 

 Pistil-hearing flower. Cal. none. Catkin hairy. Pericarp (seed,) 



on a hairy stalk, N. O. Typhaceae. J. — Page 264. 



