Blue Gum High Forest
forest in Sydney, Australia
The Blue Gum High Forest of the Sydney Basin Bioregion is a wet sclerophyll forest found in the northern parts of Sydney, New South Wales, Australia. It has been classified as critically endangered, under the New South Wales government's Threatened Species Conservation Act 1995. The principal canopy trees in this forest community are Sydney blue gum and blackbutt which are usually seen between 20 and 40 metres tall. 180 species of indigenous plants have been identified at Dalrymple-Hay Nature Reserve.
Distribution
The Blue Gum High Forest is restricted to the northern parts of Sydney, on soils based on shale with an annual rainfall over 1100 mm (43 in). Much of it grew on the ridge tops, roughly following the present day Pacific Highway from around Crows Nest up to Hornsby. Also it was recorded on soils based on the Mittagong Formation, volcanic diatremes and exposed shale lenses within the Hawkesbury Sandstone. Blue Gum High Forest grades into Turpentine-Ironbark Forest in drier areas of lower rainfall.
Remnants are found as far west as West Pennant Hills and Eastwood, though most of the few remaining areas are in suburbs such as Pymble, Turramurra and Wahroonga. Turiban Reserve in Wahroonga has particularly tall trees.
The public source identifies “Blue Gum High Forest” as forest in Sydney, Australia. This brief keeps that definition visible, then builds a research path around Blue, High and Forest.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Apr 24, 2026. The linked authority identifier is Q4929169. Authority coordinates are -33.737, 151.154. None of the 1 selected statements returned an explicit reference. The first chronological checks are 1995 and 1100.
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This entry incorporates text from “Blue Gum High Forest” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.