Licuala Wurmb
  • Verh. Batav. Genootsch. Kunsten 2: 469 (1780) 


Notes: Distribution: Bhutan to Vanuatu

General Description

Very small to moderate, solitary or clustered, acaulescent to shrubby, rarely tree-like, armed or unarmed, pleonanthic, hermaphroditic (very rarely dioecious) palms. Stem very short and subterranean, creeping or erect, ringed with close leaf scars, partly obscured by remains of leaf sheaths, sometimes bearing short bulbil-like shoots at the nodes. Leaves palmate, marcescent; leaf sheath disintegrating into a weft of fibres, the margin sometimes remaining as a broad, ligule-like ribbon or tongue; petiole adaxially channelled near the base, rounded or channelled distally, abaxially rounded or angled, armed along margins with close sharp teeth or triangular spines, or unarmed, caducous indumentum often abundant; adaxial hastula well developed, usually triangular, abaxial hastula absent; blade entire or split variously along the abaxial ribs to the very base to produce single to multiple-fold, wedge-shaped reduplicate segments, these in turn with very short splits along the abaxial folds and slightly longer splits along adaxial folds, the central segment usually entire, sometimes bifid, sometimes borne on a stalk-like extension, the ribs often with caducous indumentum, transverse veinlets usually conspicuous. Inflorescences interfoliar, much shorter to much longer than the leaves, very varied in aspect and degree of branching, from spicate to branched to 3 orders; peduncle short to very long, bearing a basal, 2-keeled tubular prophyll, and 0–5 or more, similar, tubular, closely sheathing or inflated, glabrous or tomentose, peduncular bracts; rachis bracts subtending usually distant, first-order branches adnate to the inflorescence axis above the bract mouth; subsequent orders of bracts minute; first-order branches spicate or branched further; rachillae few to ca. 30 or more, crowded or spreading, glabrous to variously scaly or hairy, bearing spirally arranged, distant or very crowded flowers. Flowers solitary or in groups of 2–3, sessile or borne on short to long spurs, each subtended by a minute triangular bract; calyx sometimes stalk-like at the base, tubular, truncate, irregularly splitting, or with 3 neat triangular lobes, glabrous or variously hairy; corolla usually considerably exceeding the calyx, tubular at the base, divided into 3 rather thick, triangular, valvate lobes, glabrous to variously hairy, usually marked near the tip on the adaxial face with the impressions of the anthers; stamens 6, epipetalous, the filaments distinct, somewhat flattened, or united into a conspicuous tube tipped with 6 equal, short to moderate teeth bearing erect or pendulous anthers, or androecial ring 3-lobed, 3 anthers borne on short distinct filaments, 3 borne at the sinuses between the lobes, anthers rounded or oblong, very small to moderate, latrorse; gynoecium tricarpellate, glabrous or variously hairy, carpels wedge-shaped, distinct in the ovarian region, united distally in a long, slender columnar style tipped with a minute dot-like stigma, ovules basally attached, anatropous. Pollen ellipsoidal, usually bisymmetric; aperture an extended distal sulcus; ectexine tectate, psilate, scabrate, perforate, perforate-rugulate, foveolate or finely reticulate, aperture margin slightly finer or similar; infratectum columellate; longest axis 28–50 µm; post-meiotic tetrads tetragonal or decussate [32/134]. Fruit globose, ovoid, narrow, straight, spindle-shaped or curved, perianth whorls usually persistent, 1–3 discrete carpels developing, abortive carpels frequently carried with the stigmatic remains at the tip of the fertile carpel, otherwise remaining at the base; epicarp frequently brightly coloured, dull or shining, rarely corky-warted, mesocarp fleshy, somewhat fibrous, thin to thick, endocarp thin, crustaceous. Seed basally attached, endosperm homogeneous or rarely ruminate, penetrated by a smooth or greatly lobed intrusion of seed coat, in species with spindle-shaped fruit the intrusion running ± the length of the seed in the middle; embryo lateral. Germination remote-tubular; eophyll strap-shaped, plicate, ± truncate and minutely lobed at the apex. Cytology: 2n = 28.

Diagnostic Description

Very small to moderate, solitary or clustered, hermaphroditic or dioecious fan palms of Southeast Asia to the western Pacific and Australia, usually immediately recognisable by the leaf being divided along the abaxial folds all the way to the petiole into wedge-shaped segments; there are a few species with undivided leaves.

Morphology

Leaf (Tomlinson 1961), roots (Seubert 1997), floral (Morrow 1965).

Biology

The species are mostly plants of the forest undergrowth; some are gregarious and lend a distinctive appearance to certain forest types, others are very local and occur as scattered individuals. A few species, e.g., L. calciphila, are strict calcicoles; L. spinosa, the most widespread species, occurs in forest on the landward fringe of mangrove and L. paludosa is common in peat swamp forest. A remarkable feature of some Bornean forest types is the abundance of Licuala spp. that grow sympatrically.

Distribution

About 134 species, ranging from India and southern China through Southeast Asia to Malesia, Queensland, the Solomon Islands and New Hebrides, the greatest diversity being in Malay Peninsula, Borneo, and New Guinea.

Uses

Leaves of some species are used for thatching and for making sleeping mats. The sword leaf of some may be used for wrapping food before or after cooking. Smaller stems are used for walking sticks and larger ones as palisades in building. Many species are highly decorative but appear generally to be slow growing. Pith and stem apices are edible.

Common Names

Licuala palms, palas.

Distribution Map

 
  • Native distribution
  • Introduced distribution
Found in
  • Asia-Temperate China China South-Central
  • China Southeast
  • Hainan
  • Asia-Tropical Indian Subcontinent Assam
  • Bangladesh
  • East Himalaya
  • India
  • Indo-China Andaman Is.
  • Cambodia
  • Myanmar
  • Nicobar Is.
  • Thailand
  • Vietnam
  • Malesia Borneo
  • Jawa
  • Malaya
  • Maluku
  • Philippines
  • Sulawesi
  • Sumatera
  • Papuasia Bismarck Archipelago
  • New Guinea
  • Solomon Is.
  • Australasia Australia Queensland
  • Pacific Southwestern Pacific Santa Cruz Is.
  • Vanuatu
Introduced into
  • Pacific North-Central Pacific Hawaii
  • South-Central Pacific Society Is.

Included Species

  Bibliography

  • 1 Saw, L.G. (2012). A revision of Licuala (Arecaceae, Coryphoideae) in Borneo. Kew Bulletin 67: 577-654.
  • 2 J. Dransfield & N. Uhl & C. Asmussen & W.J. Baker & M. Harley & C. Lewis, Genera Palmarum. The evolution and classification of palms. 2008
  • 3 Govaerts, R. & Dransfield, J. (2005). World Checklist of Palms: 1-223. The Board of Trustees of the Royal Botanic Gardens, Kew.

 Information From

Palmweb - Palms of the World Online
http://www.palmweb.org
Palmweb 2011. Palmweb: Palms of the World Online. Published on the internet http://www.palmweb.org. Accessed on 21/04/2013
  • A Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
  • B http://creativecommons.org/publicdomain/zero/1.0
eMonocot
http://e-monocot.org
eMonocot. (2010, 1st November). Retrieved Wednesday, 8th February, 2012, from http://e-monocot.org.
  • C Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
World Checklist of Selected Plant Families
http://apps.kew.org/wcsp/
WCSP 2014. 'World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://apps.kew.org/wcsp/ Retrieved 2011 onwards
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