This section is from the book "British Wild Flowers - In Their Natural Haunts Vol5-6", by A. R. Horwood. Also available from Amazon: A British Wild Flowers In Their Natural Haunts.
The habitat of this plant is moors and mountain heaths. The plant has the shrub habit. The plant is prostrate, then ascending, smooth, tufted, slender, wiry, spreading, trailing. The leaves are evergreen, linear to oblong, crowded, blunt, the borders bent-back to the midrib, forming a tube, an adaptation to dry conditions, the stomata being below, red when old, the borders roughish, downy below. The flowers are small, purple, stalkless, axillary. The sepals are rounded, hollow. The petals have a membranous margin, and are rather spoon-shaped, bent-back. The anther-stalks are very long, the anthers red. The drupe is black, edible. The plant is 6-18 in. high, flowering from April to June, and is an evergreen perennial shrub.