No. 429.] FOLIAGE LN THE GENUS ACACIA. 7251 
in size and final simultaneous disappearance of all the pairs of 
pinna was noted, as opposed to an unequal reduction starting 

Fic. 3. — Leaf of A. decurrens showing tendency toward a triple pinnation. 
(Slightly reduced.) 
at the distal end. In this A. rubida seemed to be very regular ; 
In A. heterophylla various methods of change were shown. As 
