|The Cycad Pages
- Encephalartos pterogonus R.A. Dyer & I. Verd., Kirkia 7: 147-158 (1969). H—PRE
- "TYPE: Mozambique: Mt Mruwere, north of Vila Pery, Oct 1949, Munch 451 (holo PRE, iso SRGH)."
Latin pteron, wing, and gonas, seed, from the wings extending
from the microsporophylls
Described in 1969 by South African botanists
Allen Dyer and
Inez Verdoon, who separated
the previously broadly defined E. manikensis into a number of
segregates, primarily on differences in pollen cone morphology (see also
E. concinnus, E. munchii and E. chimanimaniensis).
A member of the E. manikensis complex, a group of robust cycads from
the region of the Zimbabwe-Mozambique border with stout erect trunks of
medium height, leaves with short petioles and numerous reduced spine-like
leaflets, median leaflets with 1-6 spines on each margin, green cones and
red seed-coats. Characterised within the group by unique wings or lobes on
the lower edges of the pollen cone scales that project beyond the terminal
Distribution and habitat: Mozambique
1997 IUCN Red List of Threatened Plants
Plants arborescent; stem 1.5 m tall, 40 cm diam.
Leaves 100-150 cm long, light or bright green, highly glossy, flat
(not keeled) in section (opposing leaflets inserted at 180° on rachis);
rachis green, straight, stiff, not spirally twisted; petiole straight, with 1-6
prickles; leaf-base collar not present; basal leaflets reducing to spines.
Leaflets lanceolate, weakly discolorous, not lobed, insertion angle
obtuse (45-80°); margins flat; upper margin lightly toothed (1-3 teeth);
lower margin lightly toothed (1-3 teeth); median leaflets 15-18 cm long, 20-25
Pollen cones 2-3, narrowly ovoid, green, 30-38 cm long, 9-11 cm diam.
Seed cones 2-3, ovoid, green, 30-40 cm long, 16-18 cm diam.
Seeds oblong, 30-35 mm long, 20-23 mm wide, sarcotesta red or orange.