Burretiokentia Pic.Serm.
  • Webbia 11: 122 (1955) 


Notes: Distribution: New Caledonia

General Description

Moderate to large, solitary, slender, unarmed, pleonanthic, monoecious palms. Stem erect with prominent nodal scars, green or brown, often slightly expanded basally, prickly adventitious roots sometimes present. Leaves regularly pinnate, spreading; sheaths tubular, usually forming a prominent crownshaft, more rarely split opposite the petiole, covered with scales or tomentum, obliquely lined; petiole short, shallowly channelled adaxially, rounded abaxially, margins sharp, densely scaly or minutely dotted; rachis angled adaxially, rounded abaxially, scaly or minutely dotted on both surfaces; leaflets stiff, acute, single-fold, 1(–2) lateral veins on each side prominent adaxially, the midrib and numerous veins prominent abaxially, densely scaly when young, becoming dotted in age, ramenta usually abundant along ribs, transverse veinlets not evident. Inflorescences infrafoliar, branched to 1(–2) orders, protandrous; peduncle short; prophyll incompletely encircling the peduncle at insertion, open abaxially, caducous; peduncular bract thin, inserted close to and not much exceeding the prophyll, completely enclosing the inflorescence in bud, also caducous; rachis angled, longer than the peduncle, bearing low bracts subtending glabrous to densely tomentose branches and rachillae; rachillae appearing rather stout, arching and spreading, bearing spirally arranged, low, rounded, somewhat spreading bracts subtending triads in the lower 1/2–2/3 of each rachilla and paired or solitary staminate flowers distally; bracteoles surrounding the pistillate flower prominent, nearly equal, sepal-like, exceeding the subtending bract. Staminate flowers not at all or slightly to markedly asymmetrical, often developing well before the pistillate buds or these abortive and the inflorescence wholly staminate; sepals 3, distinct, imbricate, rounded, and the outer usually keeled dorsally; petals 3, distinct, valvate, about twice as long as the sepals, drying lined; stamens 6, filaments flattened, of uniform width or tapered distally from a broad base, inflexed at the apex in bud, anthers dorsifixed, briefly bifid at the apex, bifid nearly 1/2 their length basally, the connective dark, each locule with a central sterile connective-like area marked with included raphides; pistillode ca. 1/2 as long as the stamens or a little more to equalling them in bud, trilobed, sometimes deeply so, not much expanded at apex. Pollen ellipsoidal asymmetric; aperture a distal sulcus; ectexine tectate, psilate and sparsely perforate, aperture margin similar; infratectum columellate; longest axis 43–65 µm [2/2]. Pistillate flowers shorter than the staminate; sepals 3, distinct, broadly imbricate; petals 3, distinct, not much longer than the sepals, imbricate except for the briefly valvate apices; staminodes 3, tooth-like, borne at one side of the gynoecium; gynoecium unilocular, uniovulate, ovoid, stigmas 3, recurved, ovule pendulous, hemianatropous. Fruit globose to ellipsoidal, green when immature, becoming red at maturity, smooth when fresh, pebbled and usually irregularly shouldered and angled when dry, the stigmatic remains apical or eccentrically apical; epicarp thin, mesocarp with a dense layer of elongate, oblique sclereids over a densely tanniniferous layer and a few flat, longitudinal fibres against the endocarp, endocarp irregularly sculptured, with an adaxial keel and an abaxial groove between lateral ridges, operculum basal, rounded. Seed irregular, sculptured like the endocarp, hilum linear, lateral, endosperm homogeneous; embryo basal. Germination adjacent-ligular; eophyll bifid. Cytology not studied.

Diagnostic Description

Moderate to large solitary pinnate-leaved palms from rain forest in New Caledonia, with infrafoliar inflorescences with incomplete prophylls, and fruit with irregularly sculptured endocarp.

Morphology

Leaf (Uhl and Martens, 1980), root (Seubert 1998a, 1998b), and fruit (Essig et al. 1999).

Biology

Burretiokentia vieillardii is widely distributed from south-east to north-east New Caledonia in moist forest on serpentine or schists, B. hapala occurs in wet forests or gallery forest on calcareous and schistose soils from 50–400 m in northern New Caledonia, B. dumasii occurs on ultramafic rock at 600 m in west central New Caledonia, B. grandiflora is restricted to ultramafic rock at 200–900 m in south-east New Caledonia and B. koghiensis is found only on the Mt Koghi massif on ultramafic rock at 500–600 m.

Distribution

Five species in New Caledonia.

Uses

Not recorded.

Common Names

Not recorded.

Distribution Map

 
  • Native distribution
Found in
  • Pacific Southwestern Pacific New Caledonia

  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.
  • 3 Govaerts, R. (1996). World Checklist of Seed Plants 2(1, 2): 1-492. Continental Publishing, Deurne.

 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.