Amorphophallus plicatus Bok & H.J. Lam 

Amorphophallus plicatus Bok & H.J. Lam 

Protologue: Blumea 2 (1936): 33 

Synonym: – 


Tuber depressed globose, to c. 13 cm in diam., c. 8 cm high, no offsets, whitish. Leaf unknown. Inflorescence short peduncled. Peduncle c. 6 cm long, 1 cm in diam., dark grey with a few raised white spots. Spathe broadly campanulate, 18-25 cm long, 28-36 cm in diam., base and limb separated by a shallow constriction, base outside pale green with a few scattered, irregular, whitish spots, inside lower part purple, remaining part dirty off-white with a very faint pale green flush, limb outside dirty pale green with a few indistinct whitish spots, towards the margin turning brownish green, semi-glossy, inside glossy dark purple, margin involute, strongly and irregularly plicate-undulate, sometimes (?) laciniate, base within densely ridged-verrucose. Spadix sessile, much longer than spathe, 45 48 cm long. Female zone slightly conic, 5-5.5 cm long, 4 cm in diam. at the base, 2.5-2.8 cm in diam. at the top; flowers congested. Male zone cylindric, 4-5 cm long, 2-2.5 cm in diam., base slightly constricted; flowers congested. Appendix narrowly elongate, 36-38 cm long, c. 2 cm in diam. at the base, tapering to the top, acute or subacute, surface of lower half irregularly, shallowly grooved. Ovaries ellipsoid-oval, c. 3 mm long, c. 2 mm in diam., circular in cross-section, basal half white, upper half dark purple. Style slender, 3-4 mm long, c. 0.5 mm in diam., dark purple. Stigma conical, entire or shallowly bilobate, 1-1.5 mm in diam., 0.7-1 mm high, often laterally displaced, circular in cross-section, surface densely echinulate, dirty pale greyish-brown. Male flowers consisting of 3-5 stamens. Stamens to 3 mm long. Filaments c. 1 mm long, lower part connate, whitish. Anthers subtruncate, c. 2 mm long, c. 1.5 mm in diam., off-white to pale greyish. 


Endemic to North Sulawesi. Found in Panua Nature Reserve and Bolaang Mangandow Natural Reserve

Habitat: Secondary forests, in somewhat open area with good drainage, 140-750 m altitude. 

Notes: Amorphophallus plicatus is an endangered Sulawesi species, with a very small area of distribution and is apparently declining in its natural habitat.

Amorphophallus plicatus. (A) Part of the spathe removed showing the male and the female flowers.
Amorphophallus plicatus.
(B) An inflorescence appears in the forest.



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