Pachycladon exile is a species of plant in family Brassicaceae that is endemic to the South Island of New Zealand.

Pachycladon exile is a species of plant that is endemic to the South Island of New Zealand in the family Brassicaceae.

[3] It is also similar to P. cheesemanii, as both species are polycarpic and have woody caudices, short branches, slender inflorescences, terete siliques, heterophyllous leaves, and seeds that are uniseriate and without wings.

[7] It is found in habitats that have a high fertility rock substrate, such as limestone, schist, and volcanics, from 10 to 1600 m above sea level.

[10] Pachycladon exile is listed as Threatened - Nationally Critical, with the qualifiers CD (Conservation Dependent), DPT (Data Poor Trend), EF (Extreme Fluctuations), OL (One Location) in the most recent assessment (2023) of the New Zealand Threatened Classification for plants.