S. kentaniensis is a compact plant with unusually narrow and succulent leaves. The flowers are small, but ae produced in great numbers on a mature plant. Unlike many other species, S. kentaniensis seems to bloom more readily under winter short-day conditions, and consequently is being used to introduce that trait into showier hybrids. Another, slightly different, clone of the species can be seen by clicking here. Other flower variants can be seen here and here. A close-up of the flowers shows the attractive markings in the throat.