Dypsis utilis

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Dypsis (DIP-sis) utilis (YOO-tihl-iss)
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Hawaii, photo by Bill Austin
Scientific Classification
Genus: Dypsis (DIP-sis)
Species: utilis (YOO-tihl-iss)
Synonyms
None set.
Native Continent
Africa
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Morphology
Habit: Solitary, but often cespitose.
Leaf type: Pinnate
Culture
Survivability index
Common names
Vonitra or Vonitrandrano (water vonitra).

Habitat and Distribution

Endemic to East Madagascar. Streamsides in swamp forest or moist forest,
Hawaii, photo by BGL
gregarious; alt. 950- 1000 m.

Description

Robust palm, solitary, but often several specimens in a clump. TRUNK 6-17 m high, branching dichotomously 2-3 times at 9-11 m above the ground, the branches closely parallel, 25-37 cm. in diam., near crown about 18 cm. in diam.; internodes 7-9 cm; bark light brown; wood soft, pinkish-white, moist; crown untidy with pale brown pendulous fibre. LEAVES 13-14 per crown, with the dead leaves marcescent, 4-5 m, erect to porrect, often held on edge; sheath fibrous, about 80 cm long, brown-grey tomentose, with fibrous wings about 4.3 cm wide each, with opposite the petiole a light brown fibrous tongue about 50 cm long; petiole 45-100 cm (to 185 cm in young trees), proximally about 5 x 2.5 cm, distally 2-4.2 x 1.1-1.5 cm, flat adaxially or slightly convex, convex abaxially, with sharp edges, with scattered scales, glabrescent; rachis 2.8-3.8 m, 1.5-1.9 x 1-1.3 cm in mid-leaf, keeled, straw-brown, with scattered pale or dark red scales; leaflets 65-73 on each side of the rachis, in one plane, regular, bright green, stiff, attenuate, the proximal ones 64-82 x 1.2-2 cm, median 77-92 x 3.1-4.8 cm (interval 4-4.5 cm), distal 18-47 x 1-1.8 cm, ramenta few, redbrown, quite large, abaxial on the midrib, main veins 2 on each side of the midrib and main veins, prominent abaxially, young leaves reddish. INFLORESCENCE interfoliar to infrafoliar, up to 20 per tree (in two crowns) in all stages from closed and erect to x old fruiting stage (pendent); branching to 3 orders (rarely to 2 orders?); peduncle 125-135 cm, proximally 3.3 x 2.5 cm, distally x 2 cm, green, glabrous, curved; prophyll dark brown, 25-70 cm long, 6.5 x 2.5 cm. in diam., split at the apex; peduncular bract 154-191 x cm, green turning mid-brown, adaxially redbrown and smooth, densely scaly but soon glabrescent abaxially, glabrous adaxially, beaked for about 7 cm, abscising and carried upwards by the lengthening inflorescence; rachis about 62 cm long, somewhat angled, the branches bulbous at their bases; first order branches (number unclear) proximally 1.4-1.5 x 0.5-0.7 cm; rachillae pendulous, coral-pink in bud but turning pale green, 69-91 cm long, 2.5-5 mm in diam., glabrous or nearly so; triads distant, spirally arranged, slightly sunken in pits; buds yellowgreen to reddish brown, slightly trigonous. STAMINATE FLOWERS purplish or reddish at anthesis, with sepals 2-2.2 x 3.5-5 mm, unequal, the outermost smallest, fleshy, hooded; petals 2.7-2.8 x mm, fleshy, ovate, acute; stamens 6, biseriate, didymous, the outermost inserted slightly lower than the inner, filaments 0.8-1 mm, anthers dorsifix, 0.6-0.8 mm; pistillode about 1.5 x 0.8 mm, bottle-shaped, showing stamen indentations. PISTILLATE FLOWERS with sepals 3- x 3.5-8.5 mm, unequal, hooded, the innermost largest and enveloping the bud for some 270°; petals 3.5-4.5 x 5-7 mm, orbicular, imbricate, unequal, the innermost largest; ovary 3.5-3.8 x 2.5-3 mm, slightly asymmetric with an indistinct trigonous apex; staminodes 0.6- 0.8 mm, flat, tooth-shaped. FRUIT dull green turning purplish brown or black, globose-ellipsoid or obovoid, 17-28 x 14 -20 mm, with persistent petals about 6 mm long; endocarp fibrous. SEED about 23 mm x 16 mm, pointed at the base, rounded at the apex, with ruminate endosperm, the ruminations many, slightly irregular, and almost reaching the middle of the seed. (J. Dransfield and H. Beentje. 1995)/Palmweb. Editing by edric.

This is the most robust member of the "Vonitra" group. (J. Dransfield and H. Beentje. 1995)/Palmweb.

Culture

Sunny, very moist position.

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Comments and Curiosities

This is an upland palm, closely related to D. crinita, but even larger in all its parts, and with inflorescences branched to three rather than two orders. It has been seen near Analamazaotra (in fact there is a much photographed specimen opposite the station hotel at Andasibe; see photo below) and at Ranomafana. Sometimes cited as being critically endangered, this may not be so rare as was originally thought. The Latin name means 'useful', a reference to the piassava produced by the leaves and formerly exported for rope production. (J. Dransfield and H. Beentje. 1995)/Palmweb.

Conservation: Vulnerable. Restricted to only a few sites; numbers thought to be low. (J. Dransfield and H. Beentje. 1995)/Palmweb.

Uses: The palmheart is eaten, and the fruit pulp is sugary and also consumed. (J. Dransfield and H. Beentje. 1995)/Palmweb.

A robust palm that grows along streamsides in moist forest or swamp forest in the highlands of central eastern Madagascar close to 1000 m (3000 ft.) a.s.l. It produces a thick, solitary or clustering trunk that branches high above ground. The somewhat untidy, upright crown consists of numerous, long, arching, pinnate leaves. The leafbases produce copious amounts of piassava fibers that clothe the upper part of the trunk and that have been used for rope production. The sizeable, purplish to black fruits are said to be edible. An interesting and very unusual palm for the tropical and warm temperate/subtropical garden. (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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