26 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Sepals 3 or more. 

 D. Pex'fect stamens 1 to 10. 



E. Style 1, simple, with 1 stigma or with several connected stigmas, or 

 stigma 1 and sessile. 

 F. Ovules 1 or 2 in each cell. 

 Leaves stipulate, alternate. 



Style basal ROSACEAE. 



Style terminal or nearly so. 



Flowers papilionaceous (like that of the bean or pea), the 



upper petal outside FABACEAE. 



Flower not papilionaceous, the upper petal innermost. 



caesa;,piniaceae. 



Leaves estipulate. 

 Leaves simple. 

 Flowers regular. 



Sepals and petals 3 ; anthers dehiscent by valves. Loaves 



alternate, aromatic LAURACEAE. 



Sepals and petals 4 to 6; anthers dehiscent by longitudinal 

 slits. 

 Petals valvate in bud ; endosperm copious- OL AC ACEAE. 

 Petals imbricate in bud ; endosperm scant or none. 

 Ovule 1 ; leaves usually compound. 



ANACARDIACEAE. 



Ovules 2; leaves simple ICACINACEAE. 



Flowers distinctly irregular. 



Fruit covered with barbed spines. Leaves entire. 



KRAMERIACEAE. 

 Fruit without barbed spines. 



Stamens 4 to 8, hypogj'nous ; anthers dehiscent by pores. 



Leaves entire; tlowers racemose POLYGALACEAE. 



Stamens 9 or 10, usually perigynous; anthers dehiscent by 



longitudinal slits FABACEAE. 



Leaves compound. 



Ovule 1 ANACARDIACEAE. 



Ovules 2. 



Ovules ascending; stamens 10, perigynous, 5 of them often 



sterile CONNARACEAE. 



Ovules descending ; stamens 3 to 8, hypogynous, all perfect. 

 Stamens 3 to 5 ; seeds with endosperm ; leaves with trans- 

 parent glands RUTACEAE. 



Stamens 8 ; seeds without endosperm ; leaves without 



ti-ansparent glands BURSERACEAE. 



FF. Ovules more than 2 in each cell. 



Ovules attached to a basal or free central placenta. Leaves alter- 

 nate. 

 Stamens alternate with the petals. Leaves simple. 



OLACACEAE. 

 Stamens opposite the pcHals. 



Petals valvate in bud ; plants ciinil)ing. with tendrils. 



VITACEAE. 

 Petals imbricate ; plants erect. 



Sepals and petals 4 or 5; leaves simple; fruit l-socded. 



MYRSINACEAE. 



