Prael. Ord. Nat.: ad 202, 209 (1792); Burtt & R.M. Sm., Notes R. Bot. Gard. Edinb. 43: 235-241 (1986); R.M. Sm., ibid.: 243-254 (1986); R.M. Sm., ibid.: 440-457, part. rev.
Type: A. littoralis (Konig) Giseke
Tall herbs up to 8m with stout rhizome. Leafy shoots usually with many leaves. Inflorescence terminal on a separate leafless shoot, subglobose, very often broader than long, often surrounded by an involucre of sterile bracts, peduncle long or very short, then inflorescence subterranean with only the apical part visible; bracts densely imbricate, subtending 1 flower; bracteole tubular; flowers red to yellow; calyx tubular, 3-lobed to 3-dentate, often split down 1 side; corolla tube long, lobes shorter than the tube; lateral staminodes absent or rudimentary; labellum conspicuous, variously lobed to entire, central lobe expanded to orbicular, labellum and filament connate into a tube above the insertion of petals; free part of filament short of absent, anther crest absent; ovary 3-locular. Fruit indehiscent, globose to obovoid, longitudinally ribbed, sometimes united in a fleshy, globose or elongated syncarp; seeds aril late. 2n 48 (From Kubitsky, et al., p. 492)
Found in SE Asia from the Himalayas to N Queensland, with main distribution in Indonesia.
Comprises about 70 species.
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