EXPLANATION OF THE PLATE. 
ed 
~ oS 
OMNIA AF WHY 
PLATE CCX. CEREUS GIGANTEUS. 
. A flower and flower-bud, natural size. 
. Vertical section of a flower, natural size. 
A stamen, enlarged. 
. The apex of a style, enlarged. 
. Cross section of an ovary, enlarged. 
A cluster of ovules, much magnified. 
. A closed and an open fruit, natural size. 
A seed, enlarged. 
. Vertical section of a seed, enlarged. 
. An embryo, much magnified. 
. A cluster of spines, slightly enlarged. 
