The genus is characterized by awl-shaped spines which are distant at the base.
The umbellets are alternate, awl-shaped, with distinct flowers.
Placed among the spicules are three or four twisted stout spines, white with yellow tips, and awl-shaped.
The branches are numerous and slender, furnished with sharp, awl-shaped spines.
Subulate, awl-shaped; tapering from a broadish or thickish base to a sharp point.
Receptacle narrow, with an awl-shaped prolongation in centre.
Fertile flowers consisting of a single ovary tapering into a short style; stigmas 2–4, awl-shaped; ovule erect, anatropous.
Style awl-shaped, 3-cleft at the apex; stigmas minutely 2-lobed.
Filaments 6, awl-shaped; anthers oblong-linear, continuing erect.
Styles 3, awl-shaped, diverging, tipped with simple stigmas.