elliptical, cherry red petals have acute tips. The bright red coloration suffuses to white in the lower throat and base of the flowers. Tubes are white. stamens are pinkish white with yellow pollen coated anthers. Style and stigma are bright magenta red with the stigma held just above the anthers. Flowers number 1-2 per phylloclade. Buds are a purple pink. Flowering is mid season.Flowers are described as long and wide. S. 'Shushin' differs from its parent, S. 'Scarlet' with less erect growth habit, larger flower diameter and the outer surface color of tepals are brighter red.
growth habit is slightly cascading. Phylloclades have an average of 2-3 shallow, forward facing dentitions along each margin to the apex.