Encephalartos altensteinii – Lehmann (1834)
Eastern Cape Giant cycad (Eng), Oos-Kaapse broodboom (Afr),
umPhanga, iSundu, umGaza (Xhosa)
Category: Threatened & Protected
Encephalartos altensteinii is a medium to large plant with stems up to 5 meters long and a diameter of 35cm. Stems can be erect or reclining and grow in clumps or as single stem plants. Suckers are formed from the base.
Young leaves are bright green and covered with hair. Leaves can be 1-3 meters long, 20-30cm wide and more or less flat in cross section with a straight profile. Colour is bright yellowish green and the petiole is 10-30cm long.
Distribution & Habitat
The species is endemic to South Africa and occurs in the Eastern Cape. It occurs in coastal regions and up to the border with KwaZulu Natal. Habitat varies from rocky exposed slopes to densely shaded forests. Climate is warm to hot in summer and cool winter. Rainfall is mainly in summer and varies from 875mm to 1,000mm.
Cultivation & Propagation
E. altensteinii is easily grown and transplants readily even when mature. Plants can adapt to full sun but also do well in the shade. Soil should be well drained. It will tolerate light to moderate frost but frost in it’s habitat is rare. Propagation is by seed or by removing suckers from the parent plant.
E. altensteinii was first described in 1834. This species is well known and common in private collections because it propagates easily and grows relatively fast. A specimen of E. altensteinii (see E. longifolius) sent to Kew Gardens in 1775 is still growing in the Palm House. This species is very robust and cases exist of plants growing vigorously after being replanted, after years in a shed.
This species is variable and plants from the eastern localities have less spiny pinnae. E. altensteinii is closely related to E. natalensis but it can be be distinguished by the absence of reduced, spiny pinnae on the petiole. Natural hybrids with E. trispinosus are known where these species grow close to each other. Natural hybrids have also been recorded with E. villosus, E. arenarius and E. latifrons. The hybrids usually have intermediate characteristics between the parents.