230 



PHILOSOPHICAL NOTES ON 



was convinced of this by finding, in some young specimens, that 

 the leaf, in addition to the pair of hirge ghuids on the petiole, had 

 two smaller similar glands on the margin of the base of the blade, 

 only differing from the single teeth-glands in being larger. And 

 their largeness, as compared with the size of the teeth-glands, 

 convinced me that they were larger, owing to cohesion or fusion of 

 several together. Therefore, it was reasonable to conclude that 

 the still larger petiole-glands were due to the cohesion of all, or of 

 a large numl^er of the teeth-glands of the tivo suppressed 

 leajlets* 



Fig. 83. 



(a, «.) Green leaves of Fraxinns ormis, trilobed and simple, with anther- 

 like bodies (Paid Brousse) ; 



(Z»,) Foliaceous stamen of Alpine straAvberry (Prof. Henslow, "Struct, 

 of Flowers"); 



(c.) Stamen of green rose (Ilenslow) ; 



(rf.) Involucral bract of Nigella with anther (Masters) ; 



(f?.) Staminiferons carpel of Jia?iunculus anriconms (Henslow). 



* This rather conflicts with Prof. Henslow's theory that glands or 

 necteries are originated hy the irritation of insects (" Floral Structures," 

 p. 143). 



