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see A. papilio
The name A. caudatum, rejected as ambiguous in the note under A. papilio on page 220, is upheld by Dr Hiroshi Hara in Journ. Jap. Bot., Vol. 50, p. 268 (1975). While it is the case that there is no specimen of A. caudatum in the sense of A. papilio among the Wallich specimens under his No. 1225 in the Wallich Herbarium at Kew, there is one in the British Museum Herbarium, and this is chosen by Dr Hara as the lectotype of A. caudatum Wall.