Sedum acre; the Biting Stonecrop is common in most Icelandic regions except for the desert highlands. It has characteristic yellow star-like flowers. It forms mats of vegetative very short (low) shoots with minute fleshy leaves pressed to the stem. From there some stems elongate with larger - also fleshy - leaves, on top of which the flowers appear. The growth of many short vegetative branches differentiates this species from its lesser relative the annual stonecrop (S. annuum). The Biting Stonecrop usually grows in rocky or stony grounds but can grow on other more or less dry soils as well.
It is member of the Stonecrop family (Crassulaceae