Johannesteijsmannia lanceolata J.Dransf., Gard. Bull. Singapore 26: 78 (1972)
Species named after 'Johannes E Teijsmann [1808-1882]', a Dutch botanist and former director of
Bogor Botanical Garden.
Differs from the other species by the narrow leaves, the inflorescence with 3-6 thick branches
and the flowers with papillate petals.
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 cm wide covered with brown scurfy
scales on the underside, along the midrib and the primary nerves. Veins numerous, to 25 along
each side of the midvein, with small anastomosing veins between the veins. 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. [from http://www.palmpedia.net]
River valleys, but only on the well drained sites.
It is known only from a small, extremely limited habitat in the Sungei
Lallang watershed on the Malay peninsula.