ACACIA SEEDLINGS. 81 



AOAOIA SEEDLINGS, Part I. 

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



With Plates VIII to XII. 



[Read before the Royal Society of N. S. Wales, July 7, 1915.] 



SYNOPSIS: 

 Sequence in the Development op Leaves. 

 Seeds. 

 Hypocotyl. 

 Cotyledons. 

 Primary Leaves. 

 Bipinnate Leaves. 

 Phyllodes. 



Development of Uninerves and Plurinerves. 

 Twin Stems. 



Transport of Seeds by Water. 

 Descriptions of Seedlings. 



In order to study the development of the genus Acacia in 

 Australia, numbers of seedlings of many species are being 

 raised by me, and from an investigation of their characters 

 it is thought that some information will be obtained which 

 will assist in making the past history of this important 

 genus better understood. 



Australia is the home of that curious form of Wattle, 

 which, as an adaptation to environment, has dispensed 

 with its ancestral type of pinnate leaves, and developed a 

 flattened or cylindrical leaf-stalk or phyllode to carry on the 

 functions of leaves, and the seedlings show the phases of 

 this transition occurring at the present day. A few species 

 of phyllodineous Acacias are also found in New Caledonia, 



F— July 7, 1915. 



