Moderately robust epiphyte. Stem to 25 cm long. Leaves strap-shaped, to 30 cm long, to 2 cm wide, curved, channelled, tip notched. Inflorescences to 25 cm long, erect. Flowers to 3 cm wide, scarlet with golden yellow labellum side lobes; spring. Sepals and petals obovate to oblong. Labellum obscurely 3-lobed, with a more or less oblong midlobe, triangular side lobes. Spur inflated at tip.
A. ampullaceum (Lindl.) Schltr. from the Himalayas to Thailand is a dwarf plant with stems to 20 cm long and predominantly purple flowers to 2 cm wide.
Himalayas to Thailand.
Source: (2005). Orchidaceae. In: . Horticultural Flora of South-eastern Australia. Volume 5. Flowering plants. Monocotyledons. The identification of garden and cultivated plants. University of New South Wales Press.