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Species information Abo ut Reso urces Hom e A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Pilidiostigma tetramerum Click on images to enlarge Family Myrtaceae Scientific Name 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. Flower. Copyright Barry Jago 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 [not vouchered]. Copyright G. Sankowsky Flowers 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. Fruit Flowers [not vouchered]. Copyright G. Sankowsky 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 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. Distribution and Ecology leaf and flowers [not vouchered]. Copyright G. Sankowsky 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. Natural History & Notes Herb (herbaceous or woody, under 1 m tall) X Shrub (woody or herbaceous, 1-6 m tall) Fruit, three views, cross section and seed. Copyright W. T. X Cooper RFK Code 3364 CC-BY Australian Tropical Herbarium unless otherwise indicated in the images. Scale bar 10mm. Copyright CSIRO Cotyledon stage, hypogeal germination. Copyright CSIRO 10th leaf stage. Copyright CSIRO.

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Pilidiostigma Papuanum Click on Images to Enlarge
Species information Abo ut Reso urces Hom e A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Pilidiostigma papuanum Click on images to enlarge Family Myrtaceae Scientific Name Pilidiostigma papuanum (Lauterb.) A.J.Scott Scott, A.J. (1978) Kew Bulletin 33: 327. Flowers [not vouchered]. Copyright G. Sankowsky Stem Can grow into a small tree but usually flowers and fruits as a shrub about 1-3 m tall. Leaves Leaf blades about 13 x 4 cm. Two intramarginal veins visible on the leaf blade, the outer vein about 0.5-2 mm from the margin and the inner vein about 2-5 mm from the margin. Lateral veins inconspicuous. Petiole flat or channelled on the upper surface. Oil dots quite numerous, pale brown (?) in colour. Flowers [not vouchered]. Copyright G. Sankowsky Flowers Calyx glabrous. Petals ovate or almost orbicular, about 7-9 x 6-7 mm, marked by numerous oil glands. Staminal disk flat-topped, stamens in many concentric circles. Pollen white. Stigma terminal, slightly wider than the style. Fruit Fruits ovoid, about 25-30 x 15-20 mm, calyx lobes persistent at the apex. Seeds variable in size, about 20-22 Leaves and fruit [not vouchered]. Copyright G. Sankowsky x 5-6 mm. Testa +/- smooth but marked by numerous oil glands. Anatomy of the seed difficult to interpret. Cotyledons fused together, radicle +/- at right angles to the long axis of the larger cotyledon and completely envelops the smaller cotyledon. Seedlings Cataphylls about 1-3 pairs, produced before the first pair of true leaves.
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