Johannesteijsmannia lanceolata

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Johannesteijsmannia
(yo-hahn-nes-tehs-mahn-EE-ah) lanceolata
(lahn-seh-oh-LAH-tah)
16feb'11,Johannesteijsmannia lanceolata ms.jpg
Sarawak, Malaysia.
Scientific Classification
Genus: Johannesteijsmannia
(yo-hahn-nes-tehs-mahn-EE-ah)
Species: lanceolata
(lahn-seh-oh-LAH-tah)
Synonyms
None set.
Native Continent
Asia
Asia.gif
Morphology
Habit: Solitary, but acaulescent.
Leaf type: Entire, with cerated edges towards tip.
Culture
Survivability index
Common names
Slender Joey

Habitat and Distribution

Malaya. Malay Peninsula: Selangor in humid valley by the river. Virgin Jungle Reserve, Sungei Lalang
Singapore Botanical Garden, Singapore.
Forest Reserve, Semenyih. Kajang. in Hill Dipterocarp Forest. In Sungei Lalang Virgin Jungle Reserve, Jt. lanceolata is known from the steep banks of a forest river in a deep humid valley; growing with Jt. magnifica. Despite the proximity of the river, Jt. lanceolata grows on well drained soils and not in the low swampy ground at the bends in the river. The population of Jt. lanceolata was probably once greater - further down the valley scattered individuals occur growing in logged forest near the river. (H. E. Moore Jr. 1972)/Palmweb.

Description

Solitary, acaulescent palm, with subterranean procumbent stem to 15 cm in diameter. Leaves erect. ± lanceolate. to 3.5 m tall. Lamina to 2.4 m long and 30 em wide covered with brown scurfy scales on the underside. along the midrib and the primary nerves. Plicae numerous to 25 along each side of the costa. with small anastomosing veins between the plicae. Lower leaf margin with short spines (to 1 mm) as on the petiole. Petiole with two conspicuous yellow stripes. Leaf sheath fibrous to 25 cm long. withering to form a brown network of fibres. Inflorescence axillary buried between the petioles under a pile of dead leaves and other plant debris. Spathes at first cream. then turning brown. caducous. 3 - 4 in number. sparsely clothed in brown indumentum. to 20 cm long and 2 cm wide. tubular at the base, not inflated, acute at the apex, split down one side. Peduncle tomentose to 25 cm long, 10 mm in diameter. with one order of branching. Floriferous branches 3 - 6 in number, thick. to 16 cm long and 10 mm in diameter. pubescent, curved or straight. Flowers sessile, white and papillate, obtuse in bud, solitary or grouped in 2's and 3's. each subtended by a minute bracteole, arranged in a spiral on the branch. Calyx short 0.3 mm high, glabrous and fleshy, shallowly three-lobed. Petals to 1 mm long, broadly triangular, fleshy. and very thick, connate into a short tube at the base. papillose without, somewhat verrucose within towards the apex. Staminal ring minutely epipetalous. abruptly contracted into six equal filaments. Anthers oval. Pollen grains white. Ovary glabrous, carpels three. free at the base. connate at the apex to form a common style 0.3 mm long. Fruit to 3.4 cm in diameter. usually developing from one carpel, often developing from two or three, covered with about 90 low corky warts, reddish-brown in colour, to 2.5 mm high. Endocarp woody to 1 mm thick. Endosperm bony to 2.5 cm in diameter, penetrated at the base by corky integumental tissue. Embryo lateral. (H. E. Moore Jr. 1972)/Palmweb. Editing by edric.

Differs from the other species by the narrow leaves. the inflorescence with 3 - 6 thick branches and the flowers with papillate petals. (H. E. Moore Jr. 1972)/Palmweb.

Culture

Warm (tropical / warm sub-tropical), sheltered, shady, and moist, but well drained. Keep out of the wind. Intensely dislikes root disturbance. Be very carefull when potting up or out.

Comments and Curiosities

This species has a creeping subterranean trunk, and narrow lance shaped leaves, to 3.5 m long, and 300 mm wide. The underside of the leaves is covered in a small brown scales.

The "Slender Joey" is the rarest of the four species of Johannesteijsmannia. It is known only from a small, extremely limited habitat in the Sungei Lallang watershed on the Malay peninsula and is easily separated from the other species in the genus by its more narrow, plicate leaf that can reach to 3.5 m (11 ft.) tall and 30 cm (1 ft.) wide. (RPS.com), edric.


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).

H. E. Moore Jr. 1972. The Genus Johannesteijsmannia.


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

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