Calamus fimbriatus Van Valk., Blumea 40: 461 (1995)

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A rare rattan of lowland forest in Eastern Kalimantan distinguishable by its fimbriate bracts in the inflorescence. (Dransfield, J. & Patel, M. 2005: Rattans of Borneo, an interactive key.)A


  • It is related to Calamus mattanensis. (Dransfield, J. & Patel, M. 2005: Rattans of Borneo, an interactive key.)A


  • Least concern. (Dransfield, J. & Patel, M. 2005: Rattans of Borneo, an interactive key.)A


  • Habit - Climbing; stems clustering; not branching in the forest canopy; not dying after flowering. Plants dioecious.
    Leaf-sheath - Tubular for most of its length; stem and sheath together 1.35-1.65 cm; flagellum absent; knee present; with fewer spines than the rest of the sheath. Sheath surface lacking small horizontal ridges; without hairs or minute spines; green; with scales on surface; brown. Leaf sheath with sparse spines, or with abundant spines; spines persistent; horizontally pointing; of more or less the same size; the larger spines laminar; the longest, excluding those at the mouth of the sheath less than 1cm. Spines straight; in life same colour as the leaf sheath; with whole surface covered in fluffy indumentum; the bases downswept and crescent-like. Spines mostly not grouped. Spines around the leaf sheath mouth scarcely different from those on the rest of the sheath. Ocrea - Present; not diverging at an angle from the stem; tattering; unarmed. Leaf-stalk - Absent or usually less than 3 cm. Leaves - Cirrate; rachis armed; not hairy. Undersurface of newly emerged leaflets same as upper surface. Scales absent from leaflet surfaces. Leaflets sessile; 11 to 39 on each side of rachis; irregularly spaced and parallel; held in a single plane; linear-lanceolate; the leaflet tip acute. Longest leaflet 27.9-34.1 cm; 2 to 5cm wide; with none or very few brsitles; the margins with bristles at tip only. Short, dark or dark-tipped up to 5mm long. Leaflets scarcely plicate; the veins not radiating; midrib not raised and prominent. Lowermost leaflets not reflexed across the stem. Apical leaflets not or scarcely joined; not less than 4 cm long.
    Inflorescence - Inflorescence axis erect along the axis, with clawed spines on the primary bracts; not rooting at its tip; much shorter than the leaves; the first bract not enclosing the inflorescences at anthesis. Partial inflorescence present; bracts at the base of the partial inflorescences wholly tubular with the mouth lacerating into many fibres around the base of the partial inflorescence. Rachilla lacking an enclosing bract; not at all pressed against the subtending bract. Flowers arranged in two rows. Female rachillae not congested; without conspicuously stalked flower cups. Bracts on the rachillae not net-like.
    Fruit - At maturity 1-1.4 cm; globose; red resin (Dragon's blood) absent; one seeded. Calyx in fruit split part way and partly tubular. Fruit scales with a conspicuous central groove; the tips not recurved; colour on ripe fruit greenish; when dry greenish-white (excluding dark margins). Seed globose; the surface pitted. (Dransfield, J. & Patel, M. 2005: Rattans of Borneo, an interactive key.)A


    A. Dransfield, J. & Patel, M. 2005: Rattans of Borneo, an interactive key.