Selected cultivar of the opposite-leaved saxifrage, a perennial from the Saxifragaceae family. Like all representatives of this arctic-alpine species, it originates in the rocky high-altitude environments of the major mountain ranges of the northern hemisphere.
It forms a very tight creeping cushion, with remarkable density, covering the rock with small interlocking rosettes with tiny, oval, fleshy leaves, a bright green, edged with a white border visible in low light. This particularly neat and geometric foliage gives the cushion a tidy appearance that visually distinguishes it from other forms of the species.
The flowers, large relative to the size of the plant, are a soft pink-lilac to slightly purplish pale pink, with five well-opened petals, borne almost flush with the foliage and produced in great quantity, covering the cushion at full bloom. The dark red anthers punctuate the center of each flower with a discreet yet clear contrast. In its natural habitat, the species blooms from May to August depending on altitude. In cultivation, 'Theoden' usually blooms in March-April.
It requires well-drained soil, cool in depth, preferably alkaline, in a shaded or semi-shaded exposure. It is suitable for alpine troughs, shaded crevices, and cool rock gardens; north exposure is essential.