Deciduous shrub or small tree. Bark light grey, smooth; branches typically forking in whorls of three, often spine-tipped
Leaves in clusters on small spurs,somewhat blue-green, narrowly lanceolate, normally c. 3-4 cm long; margin entire. Flowers in small dense heads at the ends of spurs and branches, greenish yellow. Fruit 3-lobed, c. 8 mm in diameter.