There are two distinct forms of E. ghellinckii – the robust montane form occurring at altitudes of 1100 to 1800m in the KwaZulu-Natal Drakensberg and a lowland form which occurs at lower altitudes in the foothills of the Drakensberg in the catchment of the Umkomaas river. These cycads grow on steep, grassy slopes and on rocky outcrops, in full sun. The leaves are up to 1 metre long in both forms, having the same leaf texture and a light green to dark green colour. The stems are up to 3 meters tall which may well be thousands of years old.
Encephalartos ghellinckii or Drakensberg cycad is endemic to South Africa. Strongly associated with the Natal Drakensberg, this 3m tall evergreen species is found from the foothills to fairly high altitudes, growing on stream banks, steep grassy slopes and sandstone outcrops. Its preferred habitat lying within grassveld, it has developed resistance to veldfires, and also the intense cold brought on by snow and frost.
Plants from the high-altitude areas are more robust and usually have a fire-scarred base. The low altitude plants, such as those near the Umkomaas River, are stunted or dwarf-like and may have up to five trunks, often blackened by grass fires, which are thought to stimulate leaf and cone production. The plants growing in tall grassveld are usually spindly with tall stems, and have a tendency to lean over, often becoming quite procumbent.
Fronds are olive to yellow-green, and about 1m long, while leaflets are narrow (80â€“140 x 2â€“4 mm), with strongly revolute margins. Juvenile leaves are covered in grayish wool, becoming glabrous with age. Both male and female lemon-coloured cones are some 25 cm in length, occur in clusters of 2â€“5, and are densely woolly. Initially believed to be wind-pollinated, recent studies show that cones are pollinated mainly by the weevil family, and beetles from the Boganiidae, such as Metacucujus encephalarti. The Boganiidae are known only from South Africa and Australia, and this distribution, shared with the cycad family, indicates an ancient association between these insects and these plants. The beetles are strongly attracted by allomones produced in the early mornings and evenings by both male and female cones.
The seeds have a yellow, fleshy covering. The seeds are poisonous, containing the azoxyglycosides macrozamin and cycasin, and these are also present in the flesh, roots, stems and leaves, though in smaller concentrations. These toxins are characteristic of and exclusive to the cycads, and play an important role in deterring herbivores.
Named for Ã‰douard de Ghellinck de Walle, the 19th Century Ghent plant collector, horticulturist and amateur botanist who first cultivated it in Europe, it was formally described in 1868 by Charles Antoine Lemaire, the French taxonomist who happened to be an authority on Cactaceae.
|semi-shade||dark green||very low watering||slow growth||frost-hardy||uncommon|
E. ghellinkii does not grow well away from itâ€™s habitat and does not adapt readily to garden or glasshouse conditions. Plants are very slow to re-establish if transplanted and rarely cones. The high altitude forms are particularly unhappy with hot, humid conditions. Seed of this species is not readily available.”
Source / credit: https://africacycads.com/cycads.php