BLADDER SENNA. 141 



use not this instead of good sena, lest they 

 feel to their cost the force thereof;" but later 

 authors assure us that the leaves answer all 

 the purposes of senna, and Allioni has given 

 particular directions for the preparation of 

 them. The seeds, in a quantity of a dram 

 or two, excite vomiting. 



This plant grows without culture in the 

 south of France, the warmer parts of Switzer- 

 land, and in Italy, especially on mount Vesu- 

 vius, where Mr. Ray found it even in the as- 

 cent to the crater, where there were scarcely 

 any other plants, and where 



" the mountain shakes, 



Burnt to its entrails ; while in thunder breaks 

 Its bursting sides ; torn from their native bed 

 The splinter'd rocks their smoky ruin spread." 



Delille. 



The foliage of this plant is of a greyish 

 green, and it will grow to the height of 10 

 or 15 feet in the shrubbery, where it is sel- 

 dom to be seen without some few blossoms 

 from May to November. The bladders are 

 in their beauty in September, but they do not 

 open to expose the double row of their in- 

 mates until October has ripened and black- 

 ened their little kidney-shaped seeds. 



The pericarp of this fruit is not more deli- 

 cately thin than beautifully veined. The two 



