Dypsis ankirindro

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Dypsis (DIP-sis)
ankirindro (ahn-kihr-IHN-dro)
Dypsis-ankirindo-in-habitat-in-Madagascar.jpg
Madagascar. Photo by Dr. John Dransfield, Royal Botanic Gardens, Kew/Palmweb.
Scientific Classification
Genus: Dypsis (DIP-sis)
Species:
ankirindro (ahn-kihr-IHN-dro)
Synonyms
None set.
Native Continent
Africa
Africa.gif
Morphology
Habit: Clustering
Leaf type: Pinnate
Culture
Survivability index
Common names
None.

Habitat and Distribution

Dypsis ankirindro is endemic to Northeast Madagascar, known from two mountains in the
Madagascar. Photo by Dr. John Dransfield, Royal Botanic Gardens, Kew/Palmweb.
eastern central part of the Makira protected area. Mountain summit vegetation, elfin forest and mountain thicket on quartzite, Alt. 650-950 m.

Description

Clustering palm. Stem to about 5 m high, erect, about 2-3 cm in diam., internodes 2-3.6 cm, green with corky warts. Leaves 5-7 in the crown, spiral, erect, crown shuttlecock-like; crownshaft 25-32 cm, about 3.5 cm in diam., closed, forming well-defined crownshaft to 50 cm long, green with scattered dark scales and black indumentum towards apex and grey bloom when young; petiole about 30 cm long, 6-7 mm wide, sparsely to densely black/brown scaly, sometimes with thin grey indumentum, adaxially channeled; leaf rachis about 60 cm long, 4-6 mm wide at mid point, triangular in section, indumentum/scales as rachis; leaflets narrowly to broadly lanceolate, leathery, single-fold, sometimes narrowly tapering, 10-20 on each side of the rachis, regularly arranged, ascending slightly then tips drooping, inserted 8-14 cm apart, proximal leaflets 35-72 × 0.5-2.5 cm, median leaflets 37-56 × 2.6-3.5 cm, distal leaflets 6-18 × 0.6-1.5 cm, sparsely to quite densely dark scaly on both surfaces, scales more abundant towards base and on abaxial surface, few medifixed ramenta on abaxial surface of midrib. Inflorescence infrafoliar, branched to 1 order; peduncle 9-12 cm long, about 0.8 cm wide, glabrous or with scattered scales; prophyll 9.5-10.5 cm long, 2-2.5 cm wide, borne 1-2 cm above the base of peduncle, 2- keeled, opening apically, persistent; peduncular bract 20-26 cm × about 4 cm, cucullate, opening longitudinally, persistent, inserted at about 4 cm from the base of the peduncle; rachis 3.5-7.5 cm long, with scattered scales, with about 9 rachillae; rachillae 10-17 cm long, up to 8 mm in diam. at widest point, indumentum as rachis, rachilla bracts conspicuous, triads quite closely spaced. Staminate flowers 8-9 × 11-13 mm at anthesis, sepals 3, 4 × 4-4.5 mm, imbricate, cucullate, thick, with angular abaxial ridge, petals 3, 3.5-4.5 × 4-4.5 mm, valvate, triangular, stamens 6, erect, recurving, filament 6-7 × about 1.5 mm, flattened, briefly united basally, anthers medifixed about 3 × 1.5 mm; pistillode 2-3 × 1-1.5 mm, pyramidal; Pistillate flowers immature, bud about 4 × 6 mm, ovoid, perianth imbricate, staminodes 6, to 2 mm long, gynoecium 5 × 3 mm, ellipsoid. Fruits not seen. Seeds not seen. (M. Rakotoarinivo, M.S.Trudgen and W.J.Baker. 2009)/Palmweb. Edtiting by edric.

Culture

Cold Hardiness Zone: 10a

Comments and Curiosities

Conservation: Vulnerable [VU (D2)] (provisional assessment). Populations restricted to the summit of mountains in the central eastern part of Makira (Ankirindro and Beanivona), numbers of individuals are low and the area of occupancy is small. Nevertheless, isolation, difficult access and protection of its habitat decrease the risk of extinction of this species currently. (M. Rakotoarinivo, M.S.Trudgen and W.J.Baker. 2009)/Palmweb.


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).

M. Rakotoarinivo, M.S.Trudgen & W.J.Baker. 2009. The Palms of the Makira Protected Area, Madagascar.


Many Special Thanks to Ed Vaile for his long hours of tireless editing and numerous contributions.

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