cylindrical mother-in-law's tongue

S. cylindrica is an evergreen, rhizomatous perennial capable of growing to 1.2m tall. Three to four tubular, fleshy leaves, 3cm thick, arise from a basal rosette and are a dark green colour cross-banded with a paler green. Occasionally, 6-lobed, pink or greenish-white fragrant flowers are borne on an erect flower spike