Bicameralism Canadian provinces had all their upper houses abolished. In Argentina, eight provinces have bicameral legislatures, with a Senate and a Chamber of Deputies: Buenos Aires, Catamarca, Corrientes, Entre Ríos, Mendoza, Salta, San Luis (since 1987) and Santa Fe. Tucumán and Córdoba changed to unicameral systems in 1990 and 2001 respectively. In Australian states, the lower house was traditionally elected based on the one-vote-one-value principle, whereas the upper house was partially appointed and elected, with a bias towards country voters and landowners. In Queensland, the appointed upper house was abolished in 1922, while in New South Wales there were similar attempts
Zieria formosa rhyolite rock across three private properties. This zieria is listed as "Critically Endangered" under the New South Wales "Threatened Species Conservation Act" and as "Endangered" under the Commonwealth Government "Environment Protection and Biodiversity Conservation Act 1999" (EPBC) Act. The main threats to the species are changes to agricultural practices and trampling by livestock. Zieria formosa Zieria formosa, commonly known as the shapely zieria, is a plant in the citrus family Rutaceae and is endemic to a small area on the south coast of New South Wales. It is a dense, rounded shrub with velvety, clover-like leaves composed of three leaflets.