PLATE XVIII. 



f Onagra gigas. 



i, leaf from middle of main stem ; 2, leaf from main stem ; 3, bract from one of the lowermost flowers ; 

 4, flower with petals removed; 5, petal ; 6, leaf from lower part of rosette five months old; 7, leaf 

 from upper part of rosette five months old ; 8, capsules, i, 2, 3, 4, 5, and 8, five-eighths natural size; 

 6 and 7, one-fourth natural size. 



