ACACIA SEEDLINGS. 



393 



In Part II, (p. 158) A. myrbifolia is mentioned as some- 

 times having two pairs, and A. amcena, linifolia and 

 buxifolia are so recorded (infra) in the present paper. A, 

 suaveolens and A. penninervis var. faleiformis may have 

 two, A. neriifolia, A. accola, and A. implexa up to at least 

 three, A. rubida five, and A. melanoxylon seven pairs. Two 

 pairsof pinnae have recently been noticed in West Australian 

 examples of A. my Hi folia. 



Tripinnate Leaves. 

 On one plant of A. buxifolia the sixth leaf had a third 

 pinna about '3 mm. below the terminal pair, and between 

 this pair the excurrent point of the petiole was clearly 

 visible before the leaf was pressed. There was no trace of > 

 even the rudiments of a pinna opposite the odd one, which 

 was so close to the terminal pair as to make the leaf appear 

 tripinnate. Had the petiole been produced into the rachis 

 of the central pinna, instead of the excurrent point, the 

 leaf would have been strictly tripinnate. (Fig. 1.) 



Fig. 1. Acacia buxifolia. Showing an apparent tripinnate leaf, x 2. 



