Inflorescences are produced on solitary scapes and bear flowers that are white with rose-coloured markings at the base of the corolla lobes and two tooth-shaped throat appendages present.

S. edentatum was a previously overlooked species that is related to and appears similar to S. calcaratum and S. ecorne.

It differs from S. calcaratum and S. ecorne by the long petioles on its recurved leaves, and the cuneate, obtuse, and unlobed posterior corolla lobes.

They also have a distinctive lateral toothlike appendage at the base of each posterior corolla lobe.

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