Croton mamillatus is a species of shrub in the family Euphorbiaceae, which is endemic to Queensland, Australia.
Description It is a perennial shrub with simple leaf compoundness, capable of growing up to 4 metres in height. It flowers from September to January and fruits from September to June.
Habitat and distribution It is a dry rainforest plant growing in microphyll and notophyll vineforest. It grows on red soils derived from chert.
It is native to Southeast Queensland, with 3 major disjunct populations, one in Logan City southwest of Beenleigh, a second near Boonah and a third in the locality of Campbells Pocket.
Conservation Croton mamillatus is classified as "critically endangered" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999 and as "critically endangered" under the Queensland Government Nature Conservation Act 1992.
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