***Helianthemum Elfenbeinglanz ***Helianthemum Elfenbeinglanz Helianthemum Elfenbeinglanz Large ivory flowers on low green mats. £2.60 Out of stock. An excellent 'white' Rock Rose of German origin, this one is actually a soft ivory-white shading to yellow near the central boss of yellow stamens. Low, green foliage on compact, spreading bushes. A good garden plant. About 15-20cm high.