Dypsis angusta Jum.
  • Ann. Mus. Colon. Marseille, sér. 3, 6(1): 34 (1918) 


Notes: Distribution: ESE. Madagascar

General Description

Slender clustering undergrowth palm. STEMS to 2 m or more tall, 5-10 mm diam., internodes to 9 cm long near the stem base, decreasing to 0.8-1.2 cm long near the crown, basally bearing abundant chocolate-brown caducous scales, glabrescent distally; crown with c. 4-6 leaves; leaf-sheaths 5-7 cm long, forming a crownshaft, striate, covered with caducous chocolate-brown scales, auricles scarcely developed or to 10 x 2 mm, membranous. LEAF to 43 cm long including petiole; petiole 3-12 cm long, 1.5-3 mm wide, ± triangular in cross-section, bearing sparse caducous pale and chocolate-brown scales; rachis 10-29 cm long, bearing 2-3 or 7-9 (see notes below) narrow, ± approximate, regularly arranged leaflets on each side; leaflets 9-30 x 0.7-2.1 cm, drying dark or pale Dypsis angusta. Inflorescence, Vatovavy (Dransfield & Beentje JD7514) greenish brown, composed of 1-4 folds, acuminate, adaxially with sparse minute punctiform scales, abaxially minutely roughened and with scattered punctiform scales. INFLORESCENCE interfoliar, shorter than the leaves, sparsely branched to 1 (-2) orders, basal 1 or 2 first order branches sometimes branched; peduncle 7-18 cm long, c. 2.5 mm diam., densely covered in caducous, dark brown laciniate scales; prophyll 12-16 x 0.7-1cm, bearing scattered pale or dark brown scales; peduncular bract 8-10 x 0.7-1 cm, similar to prophyll; rachis 4-9 cm long, c. 2.5 mm diam., densely scaly as the peduncle; rachillae 2-20, rather short and stocky, 2-7 cm long, c. 1.5-2.5 mm diam. bearing rather dense chocolate-brown scales; triads c. 1 mm distant in newly emerged inflorescence, eventually c. 3 mm distant. STAMINATE FLOWERS c. 1 mm diam.; sepals broad, rounded, imbricate, somewhat striate, c. 0.7 x 0.7 mm; petals rounded triangular, 1 x 0.8 mm; stamens 3, antepetalous, filaments 0.8 x 0.3 mm, anthers 0.4 x 0.2 mm; staminodes tooth-like, 0.3 x 0.2 mm; pistillode very small. PISTILLATE FLOWER bud immature, c. 1 x 1 mm; sepals rounded, imbricate, c. 1 x 1 mm; petals triangular, c. 1 x 0.6 mm; staminodes 3, minute; immature ovary c. 0.4 mm diam. Mature FRUIT unknown.

Biology

Rain forest; 45-500 m.

Distribution

East Coast, only known from the Ifanadiana area and Farafangana.

Conservation

Endangered. Only known from three sites, in which population numbers are low. None of these sites is protected.

Uses

Not recorded.

Common Names

Not recorded.

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, 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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