Encephalartos arenarius

Encephalartos arenarius is a species of cycad in the family Zamiaceae. It is endemic to South Africa, where it is limited to the Eastern Cape. Its common names include Alexandria cycad and dune cycad.[1]

Encephalartos arenarius
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Division: Cycadophyta
Class: Cycadopsida
Order: Cycadales
Family: Zamiaceae
Genus: Encephalartos
Species:
E. arenarius
Binomial name
Encephalartos arenarius
R.A. Dyer

Description

This plant has a partially buried stem in the shape of an egg, with a diameter of 20-30 cm and a height of one meter from the mother. Lanceolate leaves, irregularly twisted on themselves, and 100 to 150 cm long, are composed of leathery leaves alternately arranged in the spine. The base of the petiole is glabrous and tomentose on the dorsal side of the ventral.

It is a dioecious species, with fusiform male cones, greenish, 30–50 cm long and 8–15 cm in diameter, and cylindrical female cones, 35–60 cm long and 20–30 cm in diameter.

The seeds are 20-25 mm wide. They are red and approximately spherical in shape.[2]

  • Leaves and spines
  • Leaves
  • Cone

Distribution

This species lives in densely wooded dune habitat and scrub. It is an endangered species with a maximum global population estimated at around 1500 mature individuals. Most subpopulations occur near the town of Alexandria, Eastern Cape. The main threat to the species is overcollection.[1]


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References
  1. Donaldson, J.S. 2010. Encephalartos arenarius. The IUCN Red List of Threatened Species. Version 2015.2. Downloaded on 06 September 2015.
  2. "Encephalartos arenarius". PlantNET Home Page - National Herbarium of New South Wales. Retrieved 2019-09-17.


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