Dransfieldia micrantha

From Palmpedia - Palm Grower's Guide
Jump to: navigation, search
Dransfieldia (dranz-FEEL-dee-ah)
micrantha (mih-KRAHN-tah)
10a54dz.jpg
Hawaii.
Scientific Classification
Genus: Dransfieldia (dranz-FEEL-dee-ah)
Species:
micrantha (mih-KRAHN-tah)
Synonyms
Heterospathe micrantha
Native Continent
Oceania
Oceania.gif
Morphology
Habit: Clustering & solitary.
Leaf type: Pinnate
Culture
Survivability index
Common names
Ititohoho (Jamur), Kapis (Biak-Raja Ampat), Tama’e (Wondama). Mini Pink Lipstick Palm.

Habitat and Distribution

Dransfieldia micrantha is Restricted to far western Papua province, in Indonesian New Guinea.
Hawaii. Photo by Geoff Stein.
Known from Waigeo Island in the Raja Ampat Archipelago, the Kepala Burung (Sorong and Bintuni Bay), to the lower slopes of the Wondiwoi Mountains, and the vicinity of Etna Bay. Lowland forests and forest on slopes and ridge tops, 10–180 m. elevation. Although records are relatively few, (a consequence of low collection densities), we have no reason to believe that the species, is not more widespread between these localities. Palm growers have reported that the species occurs in Papua New Guinea. We have seen no confirmation of this, and suspect that a misinterpretation of the origin, of the seed source, has been made. (W.J. Baker, S. Zona, Ch.D. Heatubun, K. Lewis, K. Lewis, R.A. Maturbongs and M.V. Norup. 2006)/Palmweb.

Description

"Dransfieldia micrantha, is an elegant palm with pinnate fronds and numerous slender cane-like stems. It grows up to 10 m. high, with a stem diameter of 2-5 cm., and has a crownshaft (smooth column at the stem tip composed of tightly rolled tubular leaf sheaths). D. micrantha is monoecious (both male and female flowers are borne on the same plant), and bears small purple flowers, followed by olive-shaped black fruits. The inflorescences are borne on the stem below the leaves, and are 34-60 cm. long with spreading branches. The flowers are in triads (groups of three with a central female and two lateral male flowers), throughout the length of the rachillae (the branches of the inflorescence that carry the flowers)."

Clustering, rarely solitary, slender understory palm. Stem to 10 m. in height, 2–5 cm. in diam., surface smooth, often reddish when young then turning brown, internodes 4.0–19.5 cm. Leaves 4–7 per crown, new leaves emerging reddish but soon turning green, 1–2 m. long including petiole; sheath 30–45 cm. long, crownshaft 50–60 cm., green with white bloom, sometimes orange-red near the apex, and extending into the abaxial side of the petiole, dark scales especially abundant at sheath mouth; petiole 10–20 cm. long, 12–14 mm. at base; leaflets 12–27 on each side of rachis, borne 55–69 mm. apart, concolorous, ramenta ca. 5 mm. long; mid-leaf pinnae 52–76 x 2–5 cm.; apical pinnae 18.0–36.0 x 0.8–1.7 cm. Inflorescence 34–60 cm. long including peduncle and rachis, all axes red to purple at anthesis; peduncle 12–26 cm. long, 9–13 x 5–8 mm. at base; prophyll 11.5–27.0 x 1.4–2.0 cm., brown at anthesis; peduncular bracts 2–3, first peduncular bract 20.0–24.0 x 1.7–3.5 cm., remaining peduncular bracts 0.5–25.0 x 5.0–12.0 mm.; rachis 9–17 cm. long; primary branches 11–14, to 35 cm., with up to 7 rachillae each; rachillae 8.5–29.0 cm. long, 1.5–3.5 mm. in diam. at anthesis, irregularly curvaceous, triads 15–28 per 5 cm.; floral bracteoles spathulate, to 1 mm. long. Staminate flowers 4.5–5.5 x 2.2–3.4 mm. in bud near anthesis, purple; sepals 1.8–2.1 x 1.7–2.6 mm.; corolla united in basalmost 0.5–1.4 mm., corolla lobes 4.2–4.8 x 1.7–2.5 mm; stamens 15–19, white, filaments 1.5–3.1 x 0.1–0.2 mm, anther 1.0–1.3 x 0.3–0.7 mm; pollen grains 30–40 mm long; pistillode less than 0.5 mm. long. Pistillate flowers 3.8–4.3 x 3.3–3.9 mm. in bud near to anthesis, purple; sepals 2.5–3.5 x 2.3–3.0 mm.; petals 3.1–3.5 x 2–2.5 mm.; staminodes ca. 3, 0.3–0.5 mm.; gynoecium ca. 3.0 x 1.6 mm. including stigmas ca. 0.7 mm. Fruit 15.0–15.9 x 7.6–9.5 mm.; epicarp black when ripe, epicarp and mesocarp 0.7 mm. thick, endocarp 0.3 mm. thick, brown. Seed 8.9–11.0 x 6.1–7.0 mm. (W.J. Baker, S. Zona, Ch.D. Heatubun, K. Lewis, K. Lewis, R.A. Maturbongs and M.V. Norup. 2006)/Palmweb. Editing by edric.

Culture

Comments and Curiosities

This is a monotypic genus.

Conservation: Near Threatened. Dransfieldia micrantha meets criterion B1 for threat category ‘‘Vulnerable’’ because its extent of occurrence is less than 20,000 km. square, but it does not qualify for the requisite two out of three subsequent criteria. However, the impact of widespread logging, both legal and illegal, suggests that D. micrantha will potentially meet the requirements of criteria B1a and B1b in the near future. (W.J. Baker, S. Zona, Ch.D. Heatubun, K. Lewis, K. Lewis, R.A. Maturbongs and M.V. Norup. 2006)/Palmweb.

Etymology: Dransfieldia is named for Dr. John Dransfield, former Head of Palm Research at the Royal Botanic Gardens, Kew, and friend and mentor to all authors of this paper, in recognition of his monumental contributions both to Malesian palm systematics and to global knowledge of palm biology as a whole. (W.J. Baker, S. Zona, Ch.D. Heatubun, K. Lewis, K. Lewis, R.A. Maturbongs and M.V. Norup. 2006)/Palmweb.

Uses: Stems used for harpoons. Leaves used for thatch. Unspecified parts used for sewing thatch. The species is grown as an ornamental in the USA and Australia, but is not yet widely available in the horticultural trade. Its colorful new leaves and inflorescences, along with its slender habit, make this palm highly desirable among palm collectors. (W.J. Baker, S. Zona, Ch.D. Heatubun, K. Lewis, K. Lewis, R.A. Maturbongs and M.V. Norup. 2006)/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).

Baker, W.J. , Zona, S. , Heatubun, Ch.D. , Lewis, K. , Lewis, K. , Maturbongs, R.A. & Norup, M.V. 2006. Dransfieldia (Arecaceae)—A New Palm Genus from Western New Guinea. Systematic Botany, 31(1): pp. 61–69.


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

Banner1B
Back to Palm Encyclopedia