Dypsis mangorensis

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Dypsis (DIP-sis)
mangorensis
(mahn-gohr-EN-siss)
D mangorensis1floribunda.jpg
Hawaii. Floribunda Palms.
Scientific Classification
Genus: Dypsis (DIP-sis)
Species:
mangorensis
(mahn-gohr-EN-siss)
Synonyms
None set.
Native Continent
Africa
Africa.gif
Morphology
Habit: Clustering
Leaf type: Pinnate
Culture
Survivability index
Common names
None.

Habitat and Distribution

Endemic to Madagascar. Mananara Biosphere Reserve, and an old collection from the lower
Hawaii.
Mangoro River. Littoral or lowland rain forest; flat, or mid slope; alt. 5-300 m.

Description

Slender clustering palm in tufts of up to 7. STEMS 1-6 m high, 1.2-3 cm in diam.; internodes about 8 cm, near crown 2.5-3 cm, green, with flaking scales; crownshaft "eau-de-nil". LEAVES spirally inserted, about 10 in the crown, entire or with up to 3 pairs of leaflets; sheath 9-13 cm long, pale green turning red-brown, with scattered to distally dense dark red scales, and sometimes with some wax, with narrowly triangular auricles to 15 mm; petiole 10-25 cm long, 2-3 mm in diam., red-brown with scattered scales; rachis 17-35 cm long, with scattered scales, in mid-leaf about 2 mm wide; lamina entire and then 35-51 cm long, connate for 8-14 cm, lobes 28-37 x 5.5-8.2 cm, the apices truncate over a width of 0.5-1 cm (also dentate on distal outer margins), main veins 7-11, with a scaly midrib and with (faint) scattered scales on minor veins; or pinnate with 2-3 leaflets on each side of the rachis, the proximal 35-40 x 2-4.7 cm and acuminate, interval to median about 10 cm, the median 24-28 x 1.1-1.7 cm, long-acuminate, interval to distal 0.2-6 cm, distal 22-32 x 1.8-4.2 cm, connate for 2-6 cm, main veins 5-7, apices truncate, 10-15 mm wide, dentate, glabrous or with a few scattered scales proximally. INFLORESCENCE interfo-liar, branched to 1 order, porrect to spreading; peduncle 14-53 cm long, proximally 6-8 x 2-4 mm, distally 2-5 mm in diam., densely to sparsely pubescent; prophyll 15-35 x 0.7-1.3 cm, borne at 2-13 cm above the base of the peduncle, open in the distal 2-6 cm, glabrous or with scattered scales; peduncular bract 15-30 cm long, inserted at 13-22 cm from the base of the peduncle, open in the distal 2-4 cm or for more than halfway, with a few scattered scales, quickly deciduous; nontubular peduncular bract occasionally present and about 3 mm long; rachis 1.8-22 cm long, pubescent to glabrous, with 3-11 rachillae; rachillae 13-27 cm long, 1-2 mm in diam., minutely puberulous to glabrous. STAMINATE FLOWERS with sepals 0.8-1.3 x 0.8-1.1 mm; petals 2-2.7 x 1.6-2.1 mm; stamens 6, in one series, the filaments 1-1.2 x 0.5 mm, cylindrical, the anthers 1.3-1.5 x 0.7-0.8 mm, dorsifixed, versatile, the locules parallel; pistillode 0.7-1.2 mm high, 0.4-0.6 mm in diam. PISTILLATE FLOWERS unknown. FRUIT and SEED unknown. (J. Dransfield and H. Beentje. 1995)/Palmweb. Editing by edric.

Remarkably like D. faneva, which however has didymous stamens. NOTE: Dypsis littoralis Jum of 1918 would have priority; this is now a synonym of D forficifolia Mart (J. Dransfield and H. Beentje. 1995)/Palmweb.

Culture

Cold Hardiness Zone: 10a

Comments and Curiosities

A medium-sized palm with entire or little-dissected leaves. The name comes from the Mangoro River, where the type was found; currently, the area is devoid of natural vegetation. (J. Dransfield and H. Beentje. 1995)/Palmweb.

Conservation: Critical. There is only one recent sighting; we saw less than twenty individuals in an area surrounded by agriculture, and probably under threat of agricultural conversion. (J. Dransfield and H. Beentje. 1995)/Palmweb.

A small, clustering Dypsis from lowland rainforest in eastern Madagascar with entire or sparsely divided leaves. Like so many palms in Madagascar, it is critically endangered by destruction of its habitat. (RPS.com)


External Links

References

Phonetic spelling of Latin names by edric.

Special thanks to Geoff Stein, (Palmbob) for his hundreds of photos.

Special thanks to Palmweb.org, Dr. John Dransfield, Dr. Bill Baker & team, for their volumes of information and photos.

Glossary of Palm Terms; Based on the glossary in Dransfield, J., N.W. Uhl, C.B. Asmussen-Lange, W.J. Baker, M.M. Harley & C.E. Lewis. 2008. Genera Palmarum - Evolution and Classification of the Palms. Royal Botanic Gardens, Kew. All images copyright of the artists and photographers (see images for credits).

Dransfield, J. & Beentje, H. 1995. The Palms of Madagascar. Royal Botanic Gardens, Kew and The International Palm Society.
Many Special Thanks to Ed Vaile for his long hours of tireless editing and numerous contributions.

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