Adenia keramanthus

Origin
Adenia keramanthus is native to East Africa, primarily found in Tanzania and Kenya. It is distributed across the semi-arid bushlands and savannas of these regions. It was officially described by Hermann August Theodor Harms in 1897.

Habitat
In its natural environment, this species thrives in dry deciduous bushlands, rocky slopes, and open woodlands, typically at altitudes between 500 and 1,500 meters. It is often found growing in red sandy or stony soils. Unlike many climbing Adenias, this species is more self-supporting and has adapted to survive prolonged dry periods by storing water in its thickened, pachycaul trunk.

Description
Adenia keramanthus is a distinctive succulent pachycaul, highly prized for its rugged, "ancient-looking" trunk and architectural branching.

Caudex & Trunk: It develops a thick, succulent, and erect trunk that becomes increasingly woody and fissured with age. The bark is typically grayish-brown to silvery, often peeling in thin, papery flakes. In cultivation, it is often treated as a "bonsai" tree due to its naturally thick base.

Stems: The branches are stout, grayish-green, and produce small, persistent leaf scars. Unlike the high-climbing vines of the genus, its branches are relatively short and create a compact, shrubby crown.

Foliage: The leaves are broadly ovate to heart-shaped, measuring 3-10 cm long. They are soft, slightly pubescent (fuzzy) on the underside, and bright green. The plant is deciduous, losing its leaves during the dry dormant season.

Flowers: The specific epithet "keramanthus" refers to its "pitcher-shaped" or bell-shaped flowers. It produces beautiful, pendulous, creamy-white to yellowish-green flowers that are much larger and more ornamental than those of most other Adenia species.

Cultivation: This is a slow-growing and robust species. It requires full sun to bright indirect light to maintain its thick trunk. It necessitates a very porous mineral substrate and should be watered regularly in summer but kept warm and absolutely dry during winter dormancy.