About Saxifraga bryoides L.
Mossy saxifrage, scientifically known as Saxifraga bryoides L., is a low-growing evergreen perennial that forms dense mats of foliage. These mats seldom grow taller than 2.5 cm (1.0 in). Its leaves are linear-lanceolate and edged with bristly hairs; they curl together in winter, a growth form typical of high-altitude cold-climate plants that helps conserve energy. Leaves within the mat are about 5 mm (0.2 in) long, while leaves on the flowering stem are 8 mm (0.3 in) long. Leaf buds growing in the leaf axils are at least as long as the leaves that protect them, a feature that distinguishes this species from the similar rough saxifrage, Saxifraga aspera. The two species also occupy different habitats: mossy saxifrage grows at higher altitudes and favours rocky, exposed positions, while rough saxifrage is most often found on damp rocks beside streams. Flowers grow singly on erect stems and are relatively large. The stems are slightly hairy, and often tinted red, as are the five calyx lobes. There are usually five, occasionally six, petals that are oval-shaped and do not overlap. The petals are white, with their lower half densely dotted with yellow spots. The ten stamens with orange anthers are arranged in two whorls, with the longer stamens growing in the gaps between the petals. The ovary is superior, the style has two stigmas, and the fruit is a two-celled capsule. Flowers appear in July and August. Saxifraga bryoides is one of only two species in section Trachyphyllum that grows at high altitudes in continental Europe; the other species is Saxifraga aspera. It occurs in the Alps, the Pyrenees, the Carpathians, and the Balkan Mountains, growing at altitudes between 1,900 and 3,000 metres (6,200 and 9,800 ft). It grows among silicaceous rocks, occupying ledges and fissures on cliffs, ridges, and summits. Mossy saxifrage can be grown in rockeries in temperate climates. It can be propagated from seed or by cuttings, and prefers gritty, well-drained soil. Apparently healthy, established plants sometimes detach from their roots; this tendency is likely caused by excessively damp growing conditions.
