Adromischus alstonii is an upright-growing,
terrestrial,
succulent bush reaching 30 cm. The branches grow variably
decumbent to erect with grey, grey-green, or brown-green, peeling bark. Mature branches can reach 1.4 cm in diameter. The grey leaves sometimes have purplish spots or splotches. They can grow to 8 cm long and 4.3 cm wide. They are narrow at the base, the topsides of the leaves are flat, and the undersides are also flat but can be convex. The inflorescences grow to 52 cm high, with sparsely-arranged flowers. The tubular, green-brown
sepals are topped with white or slightly pink, triangular
petals.
A. alstonii blooms in mid-summer. == Distribution & Habitat ==