146 R. H. CAMBAGE. 



AOAOIA SEEDLINGS, Part VI. 

 By R. H. Oambagb, f.l.s. 



[With Plates VIII - X.] 



[Read before the Royal Society of N. S. Wales, September 1, 1920.'] 



SYNOPSIS: 

 Vitality of Seeds in Sea- Water. 

 Transport of Seeds by Water. 

 Twin Stems. 



Sequence in the Development of Leaves. 

 Number of Pinnae on One Leaf. 

 Tripinnate Leaves. 

 Glands or Nectaries. 

 Flowering Seedlings. 

 Fertile Seeds from Pot Plants. 

 Descriptions of Seedlings. 



Vitality of Seeds in Sea-Water. 



Seeds of Acacia melanoxylon and A. penninervis var. 

 falciformis from Jenolan Caves germinated when planted 

 after having been immersed in sea- water for 1,192 days or 

 Si years. 



Transport of Seeds by Water. 



When discussing the possible transport of seeds in Part I, * 

 it was mentioned that a pod of Acacia Farnesiana, when 

 placed in sea- water, sank in a few days, but that Dr. H. B. 

 Ouppy had known pods to float for four or five weeks. 

 Recently a cluster of four fresh pods which had only just 

 ripened was placed in sea-water and floated for ten weeks 

 aud then sank. The cluster was then taken out and divided 

 into four, when two pods sank, but two again floated, one 

 for a further thirteen days, or eighty three days in all, and 

 the other for a further nineteen days or eighty nine days 

 in all. 



1 This Journal, Vol. xlix, 93, (1915). 



