Etymology: Honoring 19th Century Belgian collector Emile Laurent, who introduced plants of this species into cultivation. Literature: Illustrations: Vernacular: Historical notes: Described in 1903 by Belgain botanist - De Willd.. Distinguishing features: Very long leaves; large thin leaflets; yellowish green cones with persistent reddish brown tomentum and wrinkled scale apices; numerous long stalked pollen cones Distribution and habitat: Angola and Zaire (DR of Congo), restricted to the Kwango River valley along the common border, in closed gallery forest along the river and on open slopes above. Conservation: 1997 IUCN Red List of Threatened Plants category R. Description:
Plants arborescent; stem 15 m tall, 100 cm diam. Leaves 400-700 cm long, dark green, highly glossy, flat (not keeled) in section (opposing leaflets inserted at 180° on rachis); rachis green, gently curved, somewhat lax, not spirally twisted; petiole straight; leaf-base collar not present; basal leaflets reducing to spines. Leaflets lanceolate, strongly discolorous, not overlapping, not lobed, insertion angle horizontal; margins flat; upper margin heavily toothed (more than 3 teeth); lower margin heavily toothed (more than 3 teeth); median leaflets 35-50 cm long, 40-70 mm wide. Pollen cones 2-6, ovoid, yellow, 17-35 cm long, 6-10 cm diam. Seed cones 2-6, ovoid, yellow, 35-40 cm long, 18-20 cm diam. Seeds ovoid, 40-50 mm long, 25-30 mm wide, sarcotesta red.
|
