Herb to 1 m high, slender and erect with simple stems suckering at the base, stems cylindrical, pinkish brown or greyish.
Leaves linear, ± cylindrical, 2.5–15 cm long, notched towards apex where plantlets are produced, lamina spotted violet-brown.
Flowers in a corymbose cluster. Calyx tubular, 5–10 mm long. Corolla tube to 30 mm long, lobes obovate and about a third as long, salmon-coloured to scarlet.