Achyranthes arborescens (common names - Chaff tree, Soft-wood)[1] is a plant in the Amaranthaceae family endemic to Norfolk Island.

[5] It is a critically endangered species under the Australian Federal government's Environment Protection and Biodiversity Conservation Act.

The perianth is a pale amber and the flowers are enclosed by shining pink, sharp-pointed bracts.

[1] The fruit is enclosed in a bladder-like sac which does not open at maturity to release the seed.

Despite setting copious seed, seedling recruitment is reduced by cattle grazing, by high levels of seed predation from the introduced rat population, and by introduced weeds such as Solanum mauritianum and Homalanthus populifolius which require a similar habitat to A. arborescens and possibly may out-compete it.