Dypsis acuminum (Jum.) Beentje & J.Dransf.
  • Palms Madagascar: 211 (1995) 


Notes: Distribution: N. Madagascar

General Description

Solitary, moderate palm. STEMS 4-6 m tall, 8 cm diam.; internodes dark green to greyish, nodal scars forming obvious rings. LEAVES 5-6, arching, 1-1.5 m long; sheath 30-32 cm long, when flattened 8-10 cm wide, adaxially dark reddish purple, abaxially pale brown distally with scattered black scales, waxy, without ligules but with rounded shoulders; petiole 11-16 cm, proximally c. 1.2 x 0.6 cm, distally 0.8-1.3 x 0.6-0.7 cm diam., channelled with sharp edges, red-brown with blackish scales; rachis with dense to scattered blackish scales, in mid-leaf 0.6-1.2 x 0.6-0.7 cm diam.; leaflets regular, c. 30 on each side of the rachis, acuminate, proximal 35- 36 x 0.3-1 cm, median 27-39 x 1.2-1.8 cm (interval 1.5-3 cm), distal 6-30 x 0.3-1.4 cm, main veins 1, glabrous but for 3-4 scattered ramenta. INFLORESCENCE interfoliar at anthesis, infrafoliar in fruit, branched to 1 or 2 orders; peduncle 28-41 cm long, proximally c. 2 x cm, distally 1.2 x 0.6 cm, glabrous; prophyll 30-35 cm long, borne at 6-9 cm above the base of the peduncle, with scattered scales but glabrescent, open for the distal 10 cm; peduncular bract inserted at 18-20 cm from the base of the peduncle, 36-37 cm long, split over its whole length or except for the distal 3-4 cm, beaked for 3-4 cm, with dense but scattered scales; non-tubular peduncular bracts 1-1.3 cm, near the apex of the peduncle; rachis 12-34 cm, with 15-18 unbranched first order branches, in the type with one of the branches bifurcate; rachillae 10-25 cm long, 2.5-4 mm diam., glabrous, with quite dense triads, slightly sunken in pits; rachilla bract c. 2 mm long, acute to acuminate. STAMINATE FLOWERS unknown. PISTILLATE FLOWERS only known from the young fruiting stage, with the sepals 2.8- x 3-4 mm; petals 3.5-5.2 x 4-6 mm; staminodes 0.5-1 mm; gynoecium probably c. 4 mm high. FRUIT ellipsoid, 9-10 x 6-7 mm., rounded at apex; endocarp fibrous, with few anastomations. SEED ellipsoid, 8-8.5 x 5.5-6 mm, the base with a slight bump and a sub-basal depression corresponding to the embryo, the apex rounded; endosperm homogeneous.

Biology

Montane forest; alt. 700-1900 m.

Distribution

N Madagascar: Manongarivo and Marojejy Mountains.

Conservation

Unknown. Only known from a single recent collection, but it is possible this taxon occurs on more high mountains of the north, most of which are not well known botanically.

Uses

Not recorded.

Common Names

Lafaza (Manongarivo).

Distribution Map

 
  • Native distribution
Found in
  • Africa Western Indian Ocean Madagascar

  Bibliography

  • 1 Govaerts, R. & Dransfield, J. (2005). World Checklist of Palms: 1-223. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • 2 J. Dransfield & H. Beentje, The Palms of Madagascar. 1995

 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
WCS higher taxonomy
  • B All Rights Reserved
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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