NSW Department of Environment and Conservation, 2005
ISBN: 1 7412 2145 5
Irenepharsus trypherus is an annual or short-lived perennial herb belonging to the family Brassicaceae. It is known historically from 17 sites in the Illawarra and Shoalhaven regions of the south coast of NSW. Ten of these sites are located on freehold land while seven sites are located within conservation reserves.
I. trypherus was first recorded in 1861 from the Shoalhaven region, and until the 1990s was known from just five sites. Within its natural range, the species appears to have highly specialised habitat requirements with surveyed sites occupying steep slopes and cliff lines at the ecotone of sclerophyll forest and rainforest.
Threats recorded at I. trypherus sites include habitat clearance, weed invasion, erosion, and herbivory and trampling by livestock and feral/native animals.
This document constitutes the formal NSW and National Recovery Plan for I. trypherus and as such considers the requirements of the species across its known range. It identifies the actions to be taken to ensure the long-term viability of the species in nature and the parties who will carry out these actions.