Pilidiostigma tetramerum L.S.Sm.
Smith, L.S. (1959) Proceedings of the Royal Society of Queensland 70: 30. Type: Queensland, Hugh Nelson Range, ca. 2 miles S. of the Crater, 20 Nov. 1958, L.S. Smith 10505; holo: BRI, Iso: A, BISH, CANB, K, NSW.
Occasionally recorded as a small tree but usually flowers and fruits as a shrub about 2-3 m tall.
Leaf blades about 7-8 x 2-2.5 cm. Venation difficult to discern. Two intramarginal veins visible on the leaf blade, the outer one less obvious, about 0.5-1 mm from the margin, the inner one about 2 mm from the margin. Petiole +/- transversely wrinkled, flattened or channelled on the upper surface. Oil dots quite numerous.
Calyx glabrous, lobes dimorphic, the larger two +/- petaloid. All calyx lobes marked by oil glands. Petals concave, +/- orbicular, about 2.5 mm diam., oil glands less obvious than those on the calyx lobes. Staminal disk flat-topped, stamens arranged in a single row with only occasional overlaps. Stigma terminal, peltate, significantly wider than the style.
Cataphylls about 2 or 3 pairs, produced between the cotyledons and the first pair of true leaves. At the tenth leaf stage: leaf blade elliptic, apex acute, base cuneate or attenuate, oil dots visible with a lens. Leaf venation difficult to discern. Stipules caducous, small and inconspicuous. Stem glabrous, 4-angled or winged. Seed germination time 134 to 191 days.