Encephalartos heenanii, or Heenan's cycad, is a species of cycad in Southern Transvaal Province, South Africa.
This plant is tree-like, reaching heights of up to 3 meters with a stem diameter of 25âÂÂ35 cm. It often produces shoots or branches from its base. Its leaves are light green, 100âÂÂ125 cm long, with a twisted, spiral spine and a curved upper part. The lanceolate leaflets, 12âÂÂ15 cm long, are arranged oppositely on the rachis at a 45-80ð angle with smooth, entire margins. The basal leaves are smaller but not reduced to spines. This species is dioecious, with male cones that are yellow, ovoid-shaped, 27âÂÂ30 cm long, and 15âÂÂ17 cm wide. Each plant can produce up to three male cones. Female cones are similar in shape, 23âÂÂ30 cm long, and 17âÂÂ18 cm in diameter. Typically, each plant produces only one female cone, but up to three can rarely occur. The seeds are oblong, 23âÂÂ25 mm long, and covered by a red sarcotesta.