Pholidocarpus Blume
  • J.J.Roemer & J.A.Schultes, Syst. Veg. 7: 1308 (1830) 


Notes: Distribution: Pen. Thailand to Malesia

General Description

Robust, solitary, armed, pleonanthic, hermaphroditic, tree palms. Stem erect, ringed with inconspicuous, close leaf scars. Leaves induplicate, costapalmate, marcescent in immature individuals, abscising under their own weight in trunked individuals; sheath disintegrating into a conspicuous interwoven mass of reddish-brown fibres; petiole long, robust, particularly in juveniles, bearing thin caducous indumentum, slightly channelled adaxially, abaxially rounded or angular, frequently with 2 lateral yellowish lines, the margins armed with very robust, bulbous-based, horizontal spines; adaxial hastula well developed, triangular, ring-like, abaxial hastula inconspicuous or lacking; blade divided by splits along adaxial folds almost to the hastula, producing 3–4fold segments, these further divided along adaxial folds to 2/3 or 1/2 the radius into single-fold segments, also split very shallowly along abaxial folds, lowermost segments overlapping, interfold filaments not persisting, scattered caducous indumentum present along ribs in young leaves, segments longitudinally striate, midrib prominent, transverse veinlets conspicuous. Inflorescences interfoliar, emerging from the leaf sheath mouths and arching out of the crown, branching to 4 orders, several axils (up to ca. 5) producing inflorescences simultaneously; peduncle robust; prophyll tubular, 2-keeled, somewhat inflated; peduncular bracts 1–ca. 5, conspicuous, robust, tubular, tending to split rather irregularly with age; rachis longer than the peduncle; rachis bracts rather distant, each subtending a first-order branch, adnate to the inflorescence axis; subsequent bracts disintegrating or very inconspicuous; rachillae glabrous or hairy, ± spreading, bearing spirally arranged flowers, solitary or in clusters of 2–3 on low tubercles, subtended by minute triangular bracts and each bearing a minute bracteole. Flowers sessile, golden-yellow; calyx cup-shaped, shallowly 3-lobed, glabrous or sparsely hairy; corolla divided almost to the base into 3 triangular, valvate, glabrous or sparsely hairy petals; stamens 6, filaments united to form a conspicuous tube, free from the corolla, shallowly 6-lobed, tipped with short, slender, distinct filaments, bearing ± rounded or oblong, dorsifixed, introrse anthers; gynoecium tricarpellate, distinctly conical, hairy, the carpels distinct from each other basally, united apically in a long slender style, tipped with a dot-like stigma, ovule basally attached, anatropous. Pollen ellipsoidal, symmetric or slightly asymmetric; aperture a distal sulcus; ectexine tectate, coarsely perforate, perforate or finely reticulate, aperture margin occasionally finer; infratectum columellate; longest axis 34–37 µm [1/6]. Fruit developing from 1 carpel, very large, globose, stigmatic remains scarcely visible but apical; pericarp massive, the epicarp smooth (P. kingiana), or cracked into numerous low corky brown warts, mesocarp thick, ± fleshy, frequently traversed by radiating fibres, endocarp crustaceous. Seed attached laterally or near the base, endosperm massive, homogeneous, but penetrated on one side by a large convoluted intrusion of seed coat; embryo subbasal or lateral. Germination remote-tubular; eophyll entire, lanceolate, plicate. Cytology not studied.

Diagnostic Description

Tall, single-stemmed hermaphroditic fan-palms of South Thailand and Malesia eastwards to the Moluccas; leaves have fiercely toothed petioles and blades that are divided by deep and shallow splits to form deeply lobed segments; most species have large corky-warted fruit.

Morphology

Leaf (Tomlinson 1961), floral anatomy not studied.

Biology

In Malay Peninsula, Sumatra, and Borneo, species of Pholidocarpus are conspicuous palms of the lowlands, usually found in fresh water and peat swamp forest, rarely away from waterlogged soils. They may reach great heights (e.g., 45 m).

Distribution

Six recognised species, but possibly fewer, from south Thailand, Malay Peninsula, Sumatra, Borneo, Sulawesi, and the Moluccas.

Uses

The leaves may be used for thatch.

Common Names

Serdang, kepau (Pholidocarpus macrocarpus).

Distribution Map

 
  • Native distribution
Found in
  • Asia-Tropical Indo-China Thailand
  • Malesia Borneo
  • Malaya
  • Maluku
  • Sulawesi
  • Sumatera

  Bibliography

  • 1 J. Dransfield & N. Uhl & C. Asmussen & W.J. Baker & M. Harley & C. Lewis, Genera Palmarum. The evolution and classification of palms. 2008
  • 2 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
  • D See http://kew.org/about-kew/website-information/legal-notices/index.htm You may use data on these Terms and Conditions and on further condition that: The data is not used for commercial purposes; You may copy and retain data solely for scholarly, educational or research purposes; You may not publish our data, except for small extracts provided for illustrative purposes and duly acknowledged; You acknowledge the source of the data by the words "With the permission of the Trustees of the Royal Botanic Gardens, Kew" in a position which is reasonably prominent in view of your use of the data; Any other use of data or any other content from this website may only be made with our prior written agreement.