Stonecrop

Stonecrop, a name applied to most of the species of the genus Sedum. This genus of 120 species, of which forty-four are European and eight or nine are British, comprises fleshy plants, mostly small, with cymes of yellow, white, or purple star-like pentamerous flowers, with ten stamens and five carpels forming follicles. They grow on rocks, walls, sand, and other dry situations, the most common, S. acre, being a small plant with densely imbricate leaves and golden flowers, sometimes called wall-pepper."