Ziziphus quadrilocularis F.Muell.
Mueller, F.J.H. von (1862) Fragmenta Phytographiae Australiae 3: 57. Type: Ad ripas rupestres fluvii Victoriae. F.M.
Young trees clothed in spines or prickles but older trees unarmed.
Inflorescence 1-2 cm long, much shorter than the leaves. Calyx lobes about 2 mm long, pubescent on the outer surface, +/- glabrous within, longitudinally ridged on the inner surface. Petals +/- spathulate, about 1.5 mm long, margins involute, enveloping the stamens. Staminal filaments about 1.5 mm long, inserted outside the broad and flat disk, anthers about 0.5 mm long. Ovary immersed in the disk, about 0.6-0.7 mm diam.
Cotyledons oblong to +/- orbicular, about 16-18 mm long. First pair of leaves with stipular spines, leaf blade ovate, margins toothed. At the tenth leaf stage: leaf blade ovate, apex acute, base obtuse or slightly cordate, margin serrate from the base to the apex, upper surface glabrous or with a few hairs on the midrib near the base; a single gland present on each side of the margin of the leaf blade at the junction with the petiole; stipules spinose. Seed germination time 25 to 26 days.