Photo: Triodea Plain (G White)
On the upper slopes of the south eastern part of the property there is a Eucalyptus porosa (Mallee Box) woodland. It occurs as a pure stand or mixed with E. fasciculosa (Pink Gum) and Allocasuarina verticillata (Drooping She-oak), although the latter two species also form dominant stands creating a complex vegetation mosaic in this area.
A small area of E. porosa on the sandy soils has a completely different understorey in marked contrast to that on the rises.
A Banksia marginata (Silver Banksia) woodland occurs on the northern side of the creek in an area of deep sand >3m. Although it is the dominant tree, it sometimes forms mixed stands with Callitris preissii (Southern Cypress Pine). Banksia marginata woodland is poorly conserved in South Australia (Neagle , 1995).
A woodland comprising Callitris preissii with/without Eucalyptus leucoxylon (SA Blue Gum) and E. fasciculosa occurs adjacent to the creeks.
In the creek lines there is a Melaleuca brevifolia (Short-leaf Honey-myrtle) woodland, with some portions sparse, but others dense and in very good condition. Near the dam there is a small stand of Eucalyptus camaldulensis (River Red Gum).
Vegetation Associations present on Rockleigh Property
Vegetation Association Area (ha)
Eucalyptus camaldulensis Woodland 0.5 ha
Eucalyptus porosa +/- Allocasuarina verticilata +/- E. fasciculosa Woodland 40.0 ha
Callitris preissii +/- Eucalyptus leucoxylon Woodland 40.0 ha
Banksia marginata Woodland 8.0 ha
Melaleuca brevifolia woodland 5.0 ha