Abstract: Field observations are provided on the general ecology and plant associations of the endangered Australian plant species Zieria involucrata R.Br. ex Benth. (Rutaceae) based on a recent new location for the species. The plant is highly site-specific and prefers narrow, deep, shaded gullies usually associated with large sandstone boulders, sandstone ridgelines and sandstone platforms (benches). It is closely associated with Prostanthera linearis R.Br. (Lamiaceae) and some fern species, viz. Blechnum cartilagineum Swartz. (Blechnaceae), Calochlaenia dubia (R.T. Brown) M. Turner & R. White (Dicksoniaceae) etc. within its narrow distribution. The two recently discovered populations of Z. involucrata on private property in the Lower Portland area of New South Wales, number approx. 10 and 25 individuals respectively and could be regarded as metapopulations of the species in the area. These two small populations appear to be safely conserved for the near future at least, due to their relative remoteness.

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