Senna aciphylla, commonly known as sprawling senna or Australian senna, is a species of flowering plant in the family Fabaceae and is endemic to eastern Australia. It is a sprawling shrub with pinnate leaves with eight to twelve pairs of linear to narrowly elliptic leaflets, and yellow flowers in pairs or groups of three.
Description Senna aciphylla is an erect or sprawling shrub that typically grows to a height of up to . Its leaves are pinnate, long on a petiole usually long, with four to eight pairs of linear or narrowly elliptic leaflets long and wide. The edges of the leaflets are usually rolled under, the end of each almost sharply-pointed and there is a stalked gland between each pair of leaflets. The flowers are yellow and arranged in upper leaf axils in pairs or groups of three on a peduncle long, each flower on a pedicel long. The petals are long and there are ten fertile stamens, the longest anthers long. Flowering occurs in spring and summer, and the fruit is a linear pod long.
Taxonomy This species was first formally described in 1854 by Asa Gray who gave it the name Cassia aciphylla in United States Exploring Expedition from an unpublished description by George Bentham. In 1989, Barbara Rae Randell transferred the species to Senna as Senna aciphylla in the Journal of the Adelaide Botanic Garden. The specific epithet (aciphylla) means "pointed leaves".
Distribution and habitat Senna aciphylla grows in forest and rocky slopes in woodland, in south-eastern Queensland, on the coast, ranges and western slopes of New South Wales, the Australian Capital Territory, and in eastern Victoria.
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