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Known by a common name of Puncture Vine, the fruit is so robustly prickly as to puncture tires of small vehicles, using its one cm long spines. Stems radiate from the crown to form a plan view extent of up to one metre in characteristic size. The individual plants are typically prostrate, forming flat patches, but they can exhibit a more vertical growth form when competing with other species for sunlight. Leaves are pinnately compound with leaflets approximately six mm in length. Flowers are four to ten mm across, having five lemon-yellow petals.