The mountain villarsia is restricted to the Porongurup Range where it is found in moist sheltered positions on the upper slopes of granite outcrops, most populations occurring above 400m in altitude. The species favors lithic conditions along crevices and under rock overhangs in total or partial shade. In winter these locations are very wet, with water constantly percolating through them. Although moisture is normally retained in the crevices and peat during summer, periods of drought may dry the soils out causing some plants to die.
Mountain Villarsia |
Status: Endangered on the EPBC Act list
Government evidence of impact of climate change:
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Australian Government, Conservation Advice, Ornduffia calthifolia
They also exacerbate grazing pressure and increase the fire hazard due to the easy ignition of high fuel loads that are produced annually by many weed species.