Amorphophallus linguiformis Hett.
Protologue: Blumea 39 (1994): 262
Tuber unknown. Leaf solitary. Petiole c. 1 m long, c. 2 cm in diam., smooth, background colour whitish, largely covered by confluent, dark green, elliptic spots. Lamina c. 160 cm in diam., rachises narrowly winged. Leaflets elliptic or elongate-elliptic, 10-30 cm long, 5-10 cm broad, shortly acuminate. Inflorescence solitary, short peduncled. Peduncle and part of spathe hidden by cataphylls. Peduncle c. 4 cm long, c. 1 cm in diam. Spathe linguiform, narrowed between base and limb, 20 cm long, 9 cm in diam., base narrowly tubular, outside whitish with small, purple spots. Limb erect, slightly fornicate, elliptic-oval, acute, colour of outside unknown, inside glossy dark maroon. Spadix shorter than spathe, sessile, c. 13 cm long. Female zone cylindric, c. 2 cm long, c. 1 cm in diam., flowers irregularly disposed, partly in horizontal rows. Male zone cylindric c. 4 cm long, c. 1 cm in diam., flowers partly isolated and partly aligned in vertical rows. Appendix cylindric, narrowed to the base, c. 7 cm long, c. 1.5 cm in diam., obtuse, dark maroon. Ovaries depressed, c. 2 mm high, c. 1 mm in diam., purple, unilocular. Style very indistinct, c. 0.2 mm long, c. 1 mm in diam. Stigma circular in outline, c. 1 mm in diam., c. 0.5 mm high, trilobate with a deep central depression, lobed shallowly conic. Male flowers consisting of c. stamens. Stamens c. 0.8 mm high, pale yellow. Filaments absent. Anthers c. 1.5-2 mm in diam., often irregularly fused between adjacent flowers, pores elongate, apical.
Endemic to East Kalimantan, between Papadi and Pamilau. Only known from the type specimen (L).
Habitat: Hill forest on sandstone, at 700-800 m altitude.
Notes: In general the shape of the spathe of Amorphophallus linguiformis is closely similar to that of Amorphophallus pendulus but differs markedly by the much shorter peduncle and appendix. This species also differs from Amorphophallus costatus in the shorter, obtuse, dark maroon appendix.