Pilidiostigma Tetramerum L.S.Sm

Australian Tropical Rainforest Plants - Online edition Pilidiostigma tetramerum L.S.Sm. Family: Myrtaceae 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. Stem Occasionally recorded as a small tree but usually flowers and fruits as a shrub about 2-3 m tall. Leaves 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. Flowers Calyx glabrous, lobes dimorphic, the larger two +/- petaloid. All calyx lobes marked by oil glands. Flower. © Barry Jago 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. Fruit Fruits depressed globular, about 15 mm diam., +/- triangular in transverse section, calyx lobes persistent at the apex. Seeds angular, about 7-8 mm diam., cotyledons fused together, the radicle transversely oriented in the seed. Testa +/- smooth.

Seedlings Flowers [not vouchered]. © G. Cataphylls about 2 or 3 pairs, produced between the cotyledons and the first pair of true leaves. At Sankowsky 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. Distribution and Ecology Endemic to NEQ. Altitudinal range from near sea level to 1200 m. Grows as an understory plant in undisturbed lowland, upland and mountain rain forest. RFK Code Flowers [not vouchered]. © G. 3364 Sankowsky

leaf and flowers [not vouchered]. © G. Sankowsky

Fruit, three views, cross section and seed. © W. T. Cooper

Scale bar 10mm. © CSIRO

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