Definition of Australian tree fern
: a fast-growing tree fern (Cyathea cooperi) native to Australia that has broad, finely-divided fronds and a thin stem and that is cultivated as an ornamental
His black-bottom lagoon-style pool features two 20-feet-tall Australian tree ferns nearby.— Christine Cole, Orlando Sentinel, 2 Apr. 2004 An avenue of Australian tree ferns spreads great green fronds to create a delicate pattern of light and dark over indigenous Irish ferns below.— Brian De Breffny, Architectural Digest, October 1986
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“Australian tree fern.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Australian%20tree%20fern. Accessed 16 Aug. 2022.
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The first known use of Australian tree fern was in 1857
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