Senna costata

Senna costata is a shrub or small tree that typically grows to a height of , its stems and foliage softly-hairy. The leaves are pinnate, long on a petiole up to long with four or five pairs of narrowly elliptic leaflets long and wide. The flowers are yellow and arranged in upper leaf axils in groups of five to eight on a peduncle long, each flower on a pedicel long. The petals are long and there are ten fertile stamens, the anthers about long. Flowering occurs in winter and spring, and the fruit is a flat pod long, wide and usually curved. ==Taxonomy==

This species was first formally described in 1915 by John Frederick Bailey and Cyril Tenison White who gave it the name Cassia costata in the Queensland Agricultutal Journal from specimens collected by Ernest Walter Bick near Woolgar, north of Richmond in 1915. In 1989, Barbara Rae Randell reclassified the species as Senna costata in the Journal of the Adelaide Botanic Garden. The specific epithet (costata) means "ribbed", referring to the stems of this species. ==Distribution and habitat==

Senna costata grows on pindan plains in grassy woodland in northern Western Australia, the Northern Territory and northern Queensland. ==References==