We have planted Acacia auriculiformis (Springvale, Queensland) and Acacia mangium (Oriomo, PNG) side by side and collected the seed from A. auriculiformis because in A. mangium, the main stem is straight with many branches remaining attached to it for several years whereas, branching is generally heavy only when the tree reaches a height of 1 – 3 mts at which point it takes on a bushy appearance |