POLYPETALOUS EXOGENOUS PLANTS. 207 



rate, white beneath ; petals oblong or linear ; samara 

 small, smooth. — A small tree ; flowers midfrtiit red. 



NEGUNDO. Ash-leaved Maple. 



A small tree, bark green and smooth ; flowers dioecious ; 

 calyx minute ; petals none ; stamens 4^5, hypogjnous ; 

 leaves pinnately 3-5-foliolate, the leaflets ovate, lobed, or 

 toothed. Flowers small, greenish; the sterile ones on long 

 and drooping clustered pedicels ; the fertile ones racemose ; 

 both from lateral buds appearing with or before the leaves. 



N. ACEROIDES. On banks of streams. 



39. SOAP-BERRY FAMILY. Order, SAPiKDACE^ii:. 



Trees, shrubs, rarely Jierhs. Leaves simple or compound, 

 alternate or opposite ; powers mostly unsymmetrical and 

 irregular, 4 or 5 divided ; sepals and petals imbricated in 

 the bud ; stamens 5 to 10, inserted on an hypogynous or 

 perigynous disk; ovary 2-3-celled and lobed, with two, 

 sometimes more ovules in each cell. 



SYNOPSIS. 



Tribe I. DoDONEiE. Ovules 2-3 in each cell. Embryo spirally coiled. Cotyle- 

 dons distinct. Leaves alternate. 



Tribe II. Sapind^. Ovvles usually solitary. Embryo curved or straight. Coty- 

 ledons distinct. Leaves alternate. 



Ovvles solitary. Petals 5, regular. Fruit baccate Sapindus. 



Ovules solitary. Petals 4, irregular. Fruit a bladder-like capsule. 



Cardiospermum. 



Calyx 5-lobed. Petals 4-5, unequal. Leaves digitate ^scultts. 



SAPINDUS, Soap-berry. 



Calyx 5-parted, deciduous ; petals 5, regular, with a 

 scale at the base of each within ; stamens 8-10, inserted on 



