I6(i CRUC1FEK.E 



Etymology. Dedicated to Senebier, a well-known vegetable physiolo- 

 gist of the last century. 



Geographical Distribution. A genus of a few, chiefly tropical spe- 

 cies : one, however, is a native of Europe, and is very sparingly introduced 

 into this country ; while another, which extends northward to Virginia, has 

 also been widely diffused over the Old World. 



PLATE 72. Senebiera pinnatifida, DC; — a branch, natural size. 



1. A flower, magnified. (Diandrous, the two stamens occupying the 



place of the longer pairs : the two subulate bodies by the side of 

 each, resembling sterile filaments, from their position are probably 

 abortive petals.) 



2. A magnified sepal, separate. 



3. A stamen, more magnified, inside view. 



4. Silicle, magnified. 



5. Vertical section of the same, showing the seeds. 



6. Tissue, from the partition, highly magnified. 



7. Transverse section of a magnified seed near the lower end, dividing the 



cotyledons twice. 



8. Magnified embryo, detached entire. 



