from the usual Structure of Seeds, 151 



EXPLANATION OF PLATE VII. 



A. — A branch of the panicle of Leontice THAtiCTROiDtis 

 Linn. (Caulophyllum thalictroides Michaux), of the natural 

 size. 



jB. — ^The same magnified, to show at 1, the early rupture of the 

 ovarium, the ovula as yet but little enlarged and onl}' in part 

 protruded : at 2, the same parts in a more advanced state J 

 one seed being nearly ripe, supported by its elongated and 

 thickened umbilical cord ; a second ovulum considerably 

 increased in size, but abortive; and the remains of the rup- 

 tured ovarium somewhat enlarged. 



C and 1). — 'J"\vo longitudinal sections of the nearly ripe seed ; ex- 

 hibiting the vascular cord continued from the axis of the 

 funiculus umbilicalis to the apex of the seed ; the remarkable 

 process of the inner integument at the umbilicus (of which 

 another view is given separately at B); and the unripe em- 

 bryo nearly in contact with this process, and as yet undi- 

 vided. 



XIII. Re. 



