Robust epiphyte. Stem to 25 cm long. Leaves strap-shaped, to 35 cm long, to 4.5 cm wide, channelled, keeled below, tip notched. Inflorescences to 60 cm long. Flowers to 4 cm wide, white with purplish suffusions; spring to summer. Sepals and petals obovate to elliptic. Labellum obscurely 3-lobed, with a more or less triangular midlobe, tip acute. Spur funnel shaped. Syn. A. fieldingii Jennings.
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.