Laccospadix H.Wendl. & Drude, Linnaea 39: 205 (1875)

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Number of Taxa

  • 1 species

Discussion

Biology And Ecology

Etymology

Diagnosis

Description

  • Small to moderate, solitary or clustering, unarmed, pleonanthic, monoecious palm. Stem erect, becoming bare, conspicuously ringed with leaf scars. Leaves pinnate, marcescent; sheaths soon splitting opposite the petiole, bearing scattered scales, the margins becoming fibrous; petiole long, adaxially channelled, abaxially rounded, bearing scattered scales; rachis curved, scaly like the petiole; leaflets numerous, single-fold, conspicuously plicate, acute or acuminate, adaxially and abaxially with minute scattered scales, abaxially with conspicuous ramenta along the main ribs, transverse veinlets not visible. Inflorescences solitary, interfoliar, protandrous, unbranched; peduncle winged at the base, erect, elongate, bearing scattered caducous scales; prophyll inserted at the base of the peduncle, flattened, tubular, 2-winged, ± included within the leaf sheaths, tending to disintegrate into fibres apically; peduncular bract 1, inserted near the tip of the peduncle, enclosing the spike in bud, splitting longitudinally, deciduous at anthesis; rachis ± equalling the peduncle, pendulous, bearing a slightly spiralled series of prominent, rounded bracts forming the lower lips of the floral pits; floral pits enclosing triads except at the apex where enclosing paired or solitary staminate flowers only, flowers exserted one at a time; floral bracteoles 3, ± sepal-like. Staminate flowers borne on very short flattened pedicels, ± symmetrical; sepals 3, distinct, keeled, ± chaffy, with irregular margins; petals 3, ± twice as long as the sepals, distinct, triangular-ovate, valvate, marked within by anther impressions; stamens 9–12, erect, filaments very short, anthers ± elongate, basifixed, latrorse; pistillode minute, trifid. Pollen ellipsoidal, asymmetric; aperture a distal sulcus; ectexine tectate, finely perforate-rugulate, or finely granular-rugulate, especially on proximal face, aperture margin finely perforate-rugulate; infratectum columellate; longest axis 36–42 µm [1/1]. Pistillate flowers ± globular; sepals 3, distinct, ± chaffy, with irregular margins; petals similar to but longer than sepals, distinct, broadly imbricate except at the valvate, triangular tip; staminodes 3, small, ± triangular; gynoecium unilocular, uniovulate, ovoid-ellipsoidal, tipped with 3, short, recurved stigmas, ovule attached laterally near the base, campylotropous. Fruit ellipsoidal when fresh, red at maturity, perianth whorls persistent, the stigmatic scar apical; epicarp smooth, mesocarp thin, fleshy, overlying stout longitudinal fibres, endocarp thin, adherent to seed. Seed laterally attached with short oblong hilum, the raphe ± extending the length of the seed, the raphe branches anastomosing, endosperm deeply ruminate; embryo basal. Germination adjacent-ligular; eophyll bifid. Cytology: 2n = 32. (J. Dransfield, N. Uhl, C. Asmussen, W.J. Baker, M. Harley and C. Lewis. 2008)

Anatomy

Relationships

Taxonomic accounts

Bibliography

  • Dransfield, J. , Uhl, N. , Asmussen, C. , Baker, W.J. , Harley, M. & Lewis, C. 2008. Genera Palmarum. The evolution and classification of palms. Kew Publishing, Royal Botanic Gardens Kew.