Morphological variations between twelve provenances of grevillea robusta planted in north-east queensland

Abstract

Growth and morphological differences between 12 provenances of Grevillea robusta (from New South Wales and Queensland, Australia) grown at two locations on the tropical Atherton Tablelands of northern Australia were investigated at age 40 months. The following measurements were taken: tree survival; height; diameter at breast height (DBH); number of branches and forks per tree; branch diameter and angle; crown diameter and tree form. Significant differences between the provenances were found in most of the characteristics measured. Only DBH showed a site x provenance interaction. Two provenances (Duck Creek and Tyalgum) performed best. Provenance similarities in their morphological responses were examined using hierarchical cluster analysis.