Order 41— INDIAN SOAP WORTS. 



189 



Order XLI. SAPINDACE^. Indian Soapworts. 



Plants of various habit, mostlj with uusyminetrical flowers ; 

 sepals and petals both imbricated in the bud ; 

 stamens 5 to 10, inserted on a thick disk under the ovary ; 

 fruit usually colored and showy, lobed, 1 or few-seeded. 



The Order includes the following three Tribes. 



Analysis of tJie Genera. 



§ 1. The BucKEYK Tribe. Leaves opposite, carpels 2-ovaled a 



a Petals unequal. Stamens 7. Leaves digitate. Buckeye, ^s'culus. 1 



§ 2. The Soapberry Tribe. Leaves alternate. Carpels 1-ovuled b 



b Trees, vrith pinnate-leaves and fruit with soapy pulp, covering a 



large seed. Stamens 8-10. South. Soapwort. Sapin'dcs. 



b Herbs climbing with tendrils. Leaves biternate. Fruit a large, 



inflated, 3-carpeled pod. Balloon-vine. Cardiosper''mdm. 



§.3. The Bladder-nut Tribe. Leaves opposite, pinnate. STApnYi,E''A. 2 



436 



Fig 434. Branchlet of Bladder-nut, with 2 

 ternate leaves and a hanging cyme. 435. The 

 stamens and pistil enlarged. 436. A flower of 

 Ohio Buckeye. 



1. ^S'CULUS. Buckeye. 



Calyx 5-toothed. Corolla of 4 or 5 unequal petals. Stamens 7, distinct, 

 unequal. Style filiform. Ovary 3-celled, with 2 ovules in each cell, but 

 only 1 of the 6 ovules grows, becoming a large seed. Flowers in terminal 

 panicles. 



