Tacca chantrieri (Black Bat Flower)

An erect, rhizomatous herbaceous perennial up to 1m high, with oblong or lance-shaped leaves, 17-55cm long, dark green above and paler beneath, and leafless flowerstalks up to 65cm high topped by green, brown or black bracts surrounding umbels of flowers which have five green petals and dark green, maroon or black thread-like appendages, 25cm long, in summer.