28 CONTRIBUTIOXS FROM THE NATIONAL HERBARIUM. 



Leaves alternate. 



Style usually wanting ; endosperm scant or none. Petals 4 ; 

 ovary stipitate CAPP ARID ACE AE. 



Style evident ; endosperm copious. Leaves siniplo. 

 Petals similar to the sepals, perigynous ; stamens perigj-nous. 



ELACOURTIACEAE. 



Petals unlike the sepals, hypogjnous; stamens hypogjnous. 



Ovary 1-celled ; fruit spiny ; seeds glabrous, arillate ; 



flowers pinki.'^h white BIXACEAE. 



Ovary incompletely 3 to 5-eelled, smooth ; seeds woolly ; 



flowers yellow COCHLOSPERMACEAE. 



CC. Ovary l. completely or almost completely several-celled, or the ovaries 

 several and distinct. 

 D. Ovaries several, distinct or connate only at the base, with wholly dis- 

 tinct styles and stigmas. 

 Petals and stamens perigjnious. 

 Leaves stipulate, alternate. 



Seeds not arillate ROSACEAE. 



Seeds arillate. Leaves entire CROSSOSOMATACEAE, 



Leaves estipulate. 



Leaves compound, not fleshy ; ovules 2 CONNARACEAE. 



Leaves simple, fleshy : ovules numerous CRASSTJLACEAE. 



Petals and stamens hypogynous. Leaves estipulate. 

 Stamens twice as many as the sepals or fewer. 

 Ovule 1 in each carpel. Leaves simple. 



Leaves opposite or verticillate ; flowers perfect or polygamous ; 

 petals 5 ; carpels 5 to 10 ; plants not scandent. 



CORIARIACEAE. 

 Leaves alternate; flowers dioecious; petals 6 or rarely 3: plants 



scandent MENISPERMACEAK 



Ovules 2 or more in each carpel. 



Petals 6. twice as many as the sepals. Leaves entire. 



ANNONACEAE. 

 Petals as many as the sepals. 3 or more, usually 5. 



Plants leafless or nearly so KOEBERLINIACEAE. 



Plants with well-developed leaves. Leaves compound. 



Stamens and staminodia together 3 to S; ovules descending; 



leaves with translucent glands RUTACEAE. 



Stamens and staminodia together 10; ovules ascending: leaves 



without glands CONNARACEAE. 



Stamens more than twice as many as the petals. 

 Perianth usually composed of 4 or more sepals and an equal or lesser 

 number of petals. Seeds arillate ; leaves entire, alternate. 



DILLENIACEAE. 

 Perianth composed of 3 sepals and 6 or more (rarely .3) petals. 

 Leaves entire. 



Sepals valvate in bud; leaves estipulate ANNONACEAE. 



Sepals imbricate in bud: leaves usually stipulate. 



MAGNOLIACEAE. 

 DD. Ovaries several, with connate styles or stigmas, or ovary 1. 

 E. Ovule 1 in each cell. 



Stamens distinctly perigynous. 



Stamens 10 or more. Leaves alternate, stipulate ROSACEAE. 



