Jacksonia flexuosa is a species of flowering plant in the family Fabaceae and is endemic to a restricted part of the Northern Territory. It is an erect, densely branching shrub, the end branches short, zig-zagged and scattered along the branches and densely hairy, the leaves reduced to sharply-pointed scale leaves, the flowers yellow, and the fruit is a woody, densely hairy pod.
Jacksonia flexuosa is an erect, densely branched, soft shrub that typically grows up to high and wide, its branches greyish-green, the end branches short and zig-zagged, densely hairy, long and wide. Its leaves are reduced to egg-shaped scales, long, wide and sharply pointed. The flowers are arranged near the tips of the branches, each flower on a pedicel long. There are narrowly egg-shaped bracteoles long and wide on the pedicels. The floral tube is long and not ribbed. The sepals are membranous, the upper lobes long and wide and fused at the base for, the lower lobes longer and narrower. The petals are yellow, the standard petal long and deep, the wings long, and the keel long. The stamens have green filaments long. Flowering occurs from April to June, and the fruit is a woody, elliptic pod, long, wide and densely covered with white hairs.[1]
Jacksonia flexuosa was first formally described in 2007 by Jennifer Anne Chappill in Australian Systematic Botany from specimens collected east of Narbarlek in Arnhem Land in 1992.[2] The specific epithet (flexuosa) means 'flexuose' or 'zig-zagged',[3] because this species differs from J. pendens in its strongly zig-zagged branches.
This species of Jacksonia grows in woodland and is only known from near Nabarlek.
Jacksonia flexuose is listed as "not threatened" in the Territory Parks and Wildlife Conservation Act.[4]