Terrestrial herbs. Stem erect, developing into a conical, erect pseudobulb after anthesis, covered by green cataphylls when young, new shoot developing from base of a mature one, comprising a leafy shoot and a fertile one. Leaves 3–4, apical, chartaceous, suberect-spreading, plicate-venose, petiolate. Inflorescence shorter than leaves, racemose, glabrous, erect; floral bracts lanceolate, persistent. Flowers urn-shaped. Dorsal sepal free, porrect. Lateral sepals oblique at base, adnate to column foot to form a broad to tapering mentum. Petals concealed within the sepals, much smaller than sepals, oblanceolate. Labellum attached to apex of column foot, mobile, clawed at base, trilobed above, lacking a spur, lateral lobes erect, midlobe smaller, recurved, callus of several linear ridges. Column winged, with a prominent, incurved column foot; anther terminal, incumbent, glabrous, pollinia ellipsoidal-pyriform, eight in two groups of four, each with two smaller pollinia in front and two larger ones behind; stigma ovate; rostellum truncate. Ovary often sparsely and finely pubescent. Capsule erect, fusiform, ridged, produced on an elongated pedicel. (PC).
Lawler (1984) noted that leaves of A. papuanum Schltr. were used by the Kukukuku in New Guinea to wrap food for baking and that parts of A. mantinianum Linden & Cogn. are used to prepare a glue. A few species are known to be in cultivation, chiefly A. mantinianum, A. striatum Lindl., and A. sylhetense. (AP).