Small (up to 30 cm), branching succulent perennial, with distinctive papillose internodes on its c.0,4cm diameter stem and tiny, gray-green, lanceolate leaves. The leaves become more silver-coloured in direct sunlight.
Delicate tubular, white flowers appear in clusters in late Summer. The petals are distinctively long (4-6 mm).[2]
Its habitat is usually shallow soil on rocky ledges or very rocky soil on lower mountain slopes. It is sometimes also found in rock cracks in mountain ranges at higher altitude. In exposed positions the plants are smaller, often decumbent, and can be covered in a dense silvery waxy powder.[3]
