Like T. ventricosus but often only a single stem arising from swollen tuber, stem (or branches) 3-7 mm thick and streaked grey and brown, smooth or with short phyllopodia, leaves 3-5 mm broad, corolla tube 12-15 mm long and lobes 5-7 mm long.
Like T. ventricosus but stems streaked grey and brown and flowers smaller, tube 12-15 mm.