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Syst. Veg., ed. 15 bis [Roemer & Schultes] 7: 1334 (1830)
Origin and Habitat: Endemic to Java (Indonesia) with a very limited distribution now restricted to a single population at Sukawayana, West of the Island.
Habitat: Tropical moist forest especially in coastal areas. This species is considered endangered, if not extinct, because restricted geographically and edaphically in a very small remaining forest. In 1975 it was estimated that the total world population of this plant was probably about 30 individuals.
- Ceratolobus glaucescens Blume
- Calamus glaucescens D.Dietr.
ENGLISH: Rattan Palm, Rattan
MALAY (بهاس ملاي /Bahasa Melayu ): Rotan beula (Java)
Description: Ceratolobus glaucescens is an elegant, spiny climbing palm, rather short with sympodial growth that seldom reach great eights in the forest. It is dioecious (It have either male and female flowers in the same plant).
Stem: Clustered, suckering and slender-growing up to 9 m tall (but usually less than 2 m tall) and about as thick as one's finger.
Leaves: Pinnate, numerous, 150-210 cm long and spirally arranged. Pinnae (leaflets)14 to 18, cuneate-rhomboid with jagged margins, erect or spreading, spiny, sessile and have knees and small ocreas; leaf sheath closed, with green upper surface and a lower surface greyish white. Young leaves pink. The distal part of the rachis, at least in adult leaves, is leafless and terminates in a long cirrus that enables the plant to climb among the forest vegetation.
Inflorescences: Lateral panicles branched to three orders. The inflorescence is covered by one large bracts that splits open at flowering time by two small lateral splits, then the bract splits completely open when fruits begin to ripe. Male flowers are born singly on short flowering branches. Female flowers are born in pairs with a sterile male flowers.
Fruits: One-seeded, berries covered with overlapping scales.
Bibliography: Major references
1) William J. Baker, John Dransfield “Field Guide to the Palms of New Guinea” Royal Botanic Gardens, Kew, 15/gen/2006. Page 69
2) The Garden – Vol. 131 2006 - Page 305. Royal Horticultural Society (Great Britain), Royal Horticultural Society (Great Britain).
3) Baker, W.J. & Zona, S. (2006). "Dransfieldia deciphered" Palms 50(2): 71-75.
4) Baker, W.J., Zona, S., Heatubun, C.D., Lewis, C.E., Maturbongs, R.A. & Norup, M.V. (2006). "Dransfieldia (Arecaceae) - A new palm genus from western New Guinea." Syst. Bot. 31: 61–69.
5) Andrew Henderson "Palms of Southern Asia" Princeton University Press, 27/apr/2009
Cultivation and Propagation: This is a very rare palm cultivated only by specialist palm growers and botanical gardens in tropical countries, but scarcely known in cultivation. It is a shade-loving palm adapt to tropical climates.
Soil requirements: It has a fibrous root system and benefits from deep sandy loam soils that are fertile and well drained but thrives on wide range of tropical soils. Waterlogged, extremely, stony or peaty soils should be avoided.
Watering: Water regularly; do not overwater. During the summer or warmer months, water frequently to keep the soil from drying out.
Light: Will grow better in full shade, but tolerates morning sun. Seedlings like a more sheltered area.
Fertilization: Need a perfect fertilizer diet including all micro nutrients and trace elements.
Aerosol salt tolerance: Not known.
Wind tolerance: It needs wind protection.
Hardiness: It is suited for tropical or subtropical climate (USDA Zones 10-11)
Traditional uses: None recorded. It is of no particular merit as a source of cane for rattan handicrafts.
Garden uses: It is rarely cultivated, but is a very tropical looking excellent palm. Young plants have a small stature and the shape and colour of the leaves has the potential to be used as an ornamental plant. It is ideal where garden space is limited and a small plant is required. It is a great collector's palm.
Hazard: Has spiny stems and leaves.
Propagation: Seeds or division.
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