|Photo Ken Hill
|The Cycad Pages
- Encephalartos lehmannii Lehm., Pugill. 6: 14 (1834). ?
- TYPE: none cited; no plates.
Encephalartos lehmannii forma dentatus Regel ex J. Schust., Pflanzenr. 4(1): 115 (1932).
- TYPE Cult. hort. bot. leningrad 1856.
Honoring German botanist J.G.C. Lehmann.
Described in 1834 by German botanist
The entire, well-spaced leaflets distinguish this species from other blue
leaved species of the eastern Cape Province, as do the green cones with
persistent dark brownish tomentum and a more or less smooth terminal
sporophyll facets. The blue-leaved species of the Cape Province have
discolorous leaves with stomata on the undersurfaces only, in contrast to
the blue-leaved species of Transvaal, which all have stomata on both
surfaces of the leaflets.
Distribution and habitat:
Eastern Cape Province, South Africa, in arid low succulent shrubland on
rocky ridges and slopes. E. lehmannii occurs mainly on sandstones,
in contrast to the very similar E. princeps, occurring on dolerite
1997 IUCN Red List of Threatened Plants
|Photo Ken Hill
Plants arborescent; stem 2 m tall, 25-45 cm diam.
Leaves 100-150 cm long, blue or silver, dull, strongly keeled
(opposing leaflets inserted at 50-90° on rachis); rachis blue, straight
with last third sharply recurved, strongly spirally twisted in most leaves;
petiole straight, with no prickles; leaf-base collar prominent; basal leaflets
not reducing to spines.
Leaflets lanceolate, weakly discolorous, not overlapping, not lobed,
insertion angle obtuse (45-80°) or acute (less than 45°); margins
flat; upper margin entire (no teeth); lower margin entire (no teeth); median
leaflets 12-18 cm long, 15-20 mm wide.
Pollen cones 1, narrowly ovoid or fusiform, green or brown, 25-35 cm
long, 8-10 cm diam.
Seed cones 1, ovoid, green or brown, 45-50 cm long, 25 cm diam.
Seeds ovoid or oblong, 30-45 mm long, 25-30 mm wide, sarcotesta red.