Emex spinosa

Like Emex australis but plants usually erect, to c. 60 cm high, and leaves often larger, to 12 cm long, 8 cm wide. Fruiting perianth 5–7 mm long, 3–4 mm wide in the lower part, the sides each with a central rib bordered by 2–4 pits on either side, and a horizontal ridge at the widest point, shortly above the base, spines thick, spreading (or slightly recurved) to c. 6 mm diam., inner segments c. 1 mm wide at apex of tube, more or less oblong with a longitudinal, sometimes tuberculate ridge, acute at apex, not reticulate. Nut as for E. australis. Flowers Sep. (1 record).