426 DISCUSSION. 



times considered as only vai-ieties of the former, are found in the 

 same forest in the north-western part of the mountain-area, 

 though the first two are sometimes found at long distances apart 

 on the same( western) side of the mountain-barrier. E. Banksii 

 and E. Bridgesiana are closely allied, and occur together on the 

 northern part of the mountains. E. coriacea and E. vitrea are 

 closely allied species, occurring together on the mountains. E. 

 saligna and E. Deanei are closely allied, and are not separated 

 by any barrier. E. capitellata and E. macrorrhyncha, though 

 for the most part occurring on opposite sides of the barrier, are 

 often found together on the mountains. Angophora sicbvelutina 

 and A. intermedia are very closely allied, and in many places 

 occur side by side. 



Dr. Cuthbert Hall referred to his exhibit of a hybrid 

 seedling from a cultivated Acacia Baileyuna pollenised probably 

 by Acacia decurrens. The seed was gathered from a cultivated 

 tree of the former, which gi-ew about 150 yards from a wild 

 specimen of the latter, no other Acacia plant being within half 

 a mile. The seed gave about 20% of hybrids, which appeared to 

 be uniform, the foliage being green, the leaves larger than those 

 oi A. Baileyana, and the leaflets longer but not so broad and 

 less crowded. They were, however, flatter and more crowded 

 than those oiA. decurrens. From inquiries made from nurserymen, 

 it was ascertained that wiien seed was taken from A. Baileyana 

 growing near A. decurrens, it invariably gave hybrids. A. Bailey an 

 occurred naturally in a small area around Cootamundra; whilst 

 A, decurrens inhabited the coastal area, separated by the Great 

 Dividing Range. Yet they were sufficiently nearly allied to 

 intercross under altered conditions; and miglit he considered, 

 perhaps, geminate species. 



Mr. Cheel — From a study of the genus Callistemon, [N.O. 

 MvKTACEiE] which is represented by 22 species and varieties 

 distributed over Australia, the conclusion was, that the appli- 

 cation of Jordan's Law in this case, fails, unless it can be proved 

 that two reputed species were hybrids, namely, C. speciosus D.C., 

 and C. viminalis Cheel(syn. Metrosideros viminalis Solander, 



