Tetratheca deltoidea Joy Thomps. (1976:175)

Granite tetratheca



Taxonomy & Nomenclature

Possibly of hybrid origin (POWO, 2023).


Conservation Status

Last record: 1889; 1891 (Silcock et al., 2019:SM:13)

Rediscovered in 1988 (Silcock et al., 2019:SM:13)



Western Australia, Australia


Biology & Ecology










Original scientific description:

Thompson, Joy. (1976). A revision of the genus Tetratheca (Tremandraceae). Telopea 1(3): 139-215.


Other references:

Department of the Environment (2014). Tetratheca deltoidea in Species Profile and Threats Database, Department of the Environment, Canberra. Available from: Accessed Sun, 25 May 2014 12:57:48 +1000.

Hnatiuk, R. J. (1990). Census of Australian vascular plants. Australian Flora and Fauna Series 11: 1-650.

Humphreys, Aelys M., Govaerts, Rafaël, Ficinski, Sarah Z., Lughadha, Eimear Nic and Vorontsova, Maria S. (2019). Global dataset shows geography and life form predict modern plant extinction and rediscovery. Nature Ecology & Evolution 3: 1043-1047. [Supplementary Dataset 1]

Marchant, N. G. and Keighery, G. J. (1979). Poorly collected and presumably rare vascular plants of Western Australia. Kings Park Research Notes No. 5. West Perth: Kings Park and Botanic Garden. 103 pp.

POWO. (2023). Tetratheca × deltoidea Joy Thomps. Plants of the World Online (online resource). Royal Botanic Gardens, Kew, United Kingdom. Available at: [Accessed 11 December 2023]

Silcock, Jen L., Field, Ashley R., Walsh, Neville G. and Fensham, Roderick J. (2019). To name those lost: assessing extinction likelihood in the Australian vascular flora. Oryx 54(2): 167-177. [Supplementary Material]

Walter, Kerry S. and Gillett, Harriet J. (eds.). (1998). 1997 IUCN Red List of Threatened Plants. Compiled by the World Conservation Monitoring Centre. Gland, Switzerland & Cambridge, UK: IUCN – The World Conservation Union. lxiv + 862 pp.

Weaving, Sarah J. (1994). Native Vegetation Handbook for the Shire of Kellerberrin. Department of Agriculture and Food, Western Australia, Perth.


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