70 Charles E. Bessey 



tached to the corolla; ovary superior. Achras, Sidcroxylon, 

 Chrysophylluiiij Miiiiusops. (Pf. IV, i, 126.) 



Family 162. Ebenaceae. Tropical and subtropical trees and 

 shrubs, with very hard wood, and mostly alternate leaves ; flow- 

 ers mostly dioecious ; stamens usually free from the corolla ; 

 ovary superior. Diospyros, Maba. (Pf. IV, i, 153.) 



Family 163. Symplocaceae. Tropical and subtropical trees 

 and shrubs, with mostly perfect flowers ; stamens many. Sym- 

 plocos. (Pf. IV, I, 165.) 



Family 164. Styracaceae. Trees and shrubs with alternate 

 leaves ; flowers mostly perfect ; stamens attached to the corolla ; 

 ovary usually inferior. Halcsia, Styrax. (Pf. IV, i, 172.) 



Subclass BICARPELLATAE. Flowers gamopetalous ; pistil 

 usually of two united carpels, its ovary generally superior ; sta- 

 mens as many as the corolla-lobes or less. 



Order Polemoniales. Corolla regular; stamens alternate 

 with the corolla-lobes, and of the same number; leaves mostly 

 alternate. 



Family 165. Polemoniaceae. Herbs (and shrubs) with alter- 

 nate or opposite leaves ; corolla-lobes contorted ; ovary tricar- 

 pellary, 3-celled ; ovules 2 or more. Cohaca, Phlox, Gilia, Pole- 

 monium. (Pf. IV, 3a, 40.) 



Family 166. Convolviilaceae. Herbs, shrubs (and trees) with 

 alternate leaves; corolla-limb more or less plicate (rarely imbri- 

 cated) ; ovary 2- (3- to 5-) celled; ovules few. Evolvulns, Oua- 

 moclit, Ipomoca, Coiizvlviilus, Cuscuta (parasitic). (Pf. IV, 



3a, I.) 



Family 167. Hydrophyllaceae. Herbs with radical or alter- 

 nate (rarely opposite) leaves; corolla-lobes imbricated (or con- 

 torted) ; ovary i- or incompletely 2-celled; ovules 2 or more. 

 Hydrophyllum, Phacclia, Naiiia. (Pf. IV, 3a, 54.) 



Family 168. Borraginaceae. Herbs, shrubs, and trees with 

 alternate leaves; corolla-lobes imbricated (or contorted); ovary 

 bicarpellary, 4-celled, 4-lobed; ovules solitary. Hcliotropiinn, 

 Cynoglossnm, Orcocarya, Borrago, Myosoiis, Mcrtcusia, Litho- 

 spcrmum. (Pf. IV, 3a, 71.) 



344 



