|Photo Ken Hill
|The Cycad Pages
- Encephalartos heenanii R.A. Dyer, Bothalia 10(4): 539-546 (1972). H—PRE
- "TYPE: Swaziland, Piggs Peak, on Krantzes, Sep 1969, D. Heenan s.n., PRE 30904I (holo PRE)."
Honouring Denis Heenan of Swaziland, who
recognised this as a distinct species.
Described in 1969 by South African botanist
Closest to E. paucidentatus, but a plant of smaller stature with
shorter leaves that are generally lighter in colour, more persistently
tomentose, and more rigidly upturned to form a cup-shaped crown. Cones of
E. heenanii are smaller and greenish brown, and pollen and seed
cones are also almost identical.
Distribution and habitat:
Southern Transvaal Province, South Africa, and adjacent parts of Swaziland,
in grassland on steep slopes.
1997 IUCN Red List of Threatened Plants
|Photo Ken Hill
Plants arborescent; stem 3 m tall, 25-35 cm diam.
Leaves 100-125 cm long, light or bright green, semiglossy, flat (not
keeled) in section (opposing leaflets inserted at 180° on rachis);
rachis green, incurved, curving stiffly upwards, slightly twisted in some
leaves; petiole recurved, with no prickles; leaf-base collar not present; basal
leaflets not reducing to spines.
Leaflets lanceolate, strongly discolorous, not overlapping, not
lobed, insertion angle obtuse (45-80°); margins flat, or incurved; upper
margin entire (no teeth); lower margin entire (no teeth); median leaflets 12-15
cm long, 15-20 mm wide.
Pollen cones 1-3, ovoid, yellow, 27-30 cm long, 15-17 cm diam.
Seed cones 1-3, ovoid, yellow, 23-30 cm long, 17-18 cm diam.
Seeds oblong, 23-25 mm long, 14-18 mm wide, sarcotesta red.