Jacksonia arnhemica is a species of flowering plant in the family Fabaceae and is endemic to the Northern Territory. It is an erect, densely branched, delicate shrub, the end branches sharply-pointed phylloclades, with yellow flowers, and woody, hairy pods.
Jacksonia arnhemica is an erect, densely branched, delicate shrub that typically grows up to high and wide. Its end-branches are sharply pointed phylloclades, wide at their mid-point. The leaves are reduced to sharply-pointed, mid- to dark brown, egg-shaped scales, long and wide. The flowers are scattered along branches on pedicels long. There are egg-shaped bracteoles long and wide on the pedicels. The floral tube is long and the sepals are membranous, the lower lobes longer than the upper lobes, and fused at the base. The petals are yellow, the standard petal long, the wings long, and the keel long. The stamens have pink filaments long. Flowering occurs from March to October, and the fruit is a woody pod, long and wide, with white hairs pressed against the surface.[1]
Jacksonia arnhemica was first formally described in 2007 by Jennifer Anne Chappill in Australian Systematic Botany from specimens collected near Malay Bay in 1987.[2]
This species of Jacksonia grows in woodland in sand over sandstone in the north of the Northern Territory and offshore islands in the Arnhem Coast, Arnhem Plateau, Central Arnhem and Gulf Fall and Uplands bioregions of the Northern Territory.[3]
Jacksonia arnhemica is listed as "least concern" under the Territory Parks and Wildlife Conservation Act.