AOACIA SEEDLINGS. 147 



The likelihood of the wide distribution of this species 

 having been assisted by the transport of seed-pods by ocean 

 currents, though not proved, is much strengthened by the 

 result of this experiment. 



Twin Stems. 

 Several seeds of Acacia asparagoicles from Medlow, and 

 A. vomer if ormis from Mount Victoria, produced twin stems 

 which became two separate plants. This feature has 

 previously been recorded in the case of A, juniperina 

 (Part I, 93). 



Sequence in the Development of Leaves. 

 In Part V, (p. 144), it was pointed out that of 104 species 

 examined, 92 commenced with one simply pinnate leaf, 

 while 12 had an opposite pair. The following three may 

 now be added to those which produce only one pinnate leaf, 

 and this brings the number to 95 : — A. argentea Maiden, 

 A. Hamiltoniana Maiden, and A. vomerif ormis A. Ounn. 



Number of Pinnae on One Leaf. 

 In addition to the records already furnished (Part V, p. 

 145), relating to the number of pinnae on one leaf of a 

 phyllodineous Acacia, the following are now added — A. 

 rigenSy A. cultrif ormis and A. Hamiltoniana, all of which 

 may have two pairs. A. rubida may have seven pairs. 



Tripinnate Leaves. 



In Part III (p. 393), reference is made to tripinnate and 



apparent tripinnate leaves. The latter, which are not 



uncommon, consist of three pinnae at the end of the leaf, 



but with the excurrent point or terminal seta 1 still present, 



1 I have decided to adopt the term "terminal seta" as being more 

 expressive than " excurrent point " for the prolongation of the leaf axis, 

 and this feature may he seen practically on every pinnate leaf of Acacia 

 seedlings. See a paper by J. J. Fletcher, m.a., b.Sc, " On the correct 

 Interpretation of the so-called Phyllodes of the Australian Phyllodineous 

 Acacias." Proc. Linn. Soc. N.S. Wales, Vol. xlv, 24, (1920). 



