Pedalium

Erect or ascending annual herbs; stems simple or branched. Leaves petiolate, oblong to obovate, entire or coarsely dentate, subsucculent. Flowers solitary in leaf axils. Corolla: tube subcylindric or narrowly funnel-shaped; limb spreading, subequally 5-lobed, yellow. Stamens included; thecae divergent; staminodium present or absent. Ovary bilocular, undivided, each locule with 2 pendulous ovules. Fruit indehiscent, subpyramidal, 4-angled, rounded to acute at apex and with a spreading spine at each basal angle, then abruptly contracted into a narrow collar below; mesocarp spongy. Seeds 1 or 2 in each locule, narrowly oblong in outline.