Grevillea banksii beside a track in the Herberton Range
This is the upright, tree-like form of this variable species. As with the coastal prostrate form, red and white flowered plants can be found growing intermixed. As there are usually no intermediates, the colour is presumably determined by two different alleles of a single gene. It is quite strange that the red/white polymorphism has been retained through the evolution of the prostrate versus the upright forms.
Grevillea banksii beside a track in the Herberton Range
This is the upright, tree-like form of this variable species. As with the coastal prostrate form, red and white flowered plants can be found growing intermixed. As there are usually no intermediates, the colour is presumably determined by two different alleles of a single gene. It is quite strange that the red/white polymorphism has been retained through the evolution of the prostrate versus the upright forms.