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Subterranean stem black, up to 5 mm in diameter, usually vertical and deeply buried, branching into horizontal stems, all rooting at the nodes and bearing aerial stems at intervals. Aerial stem hollow, longitudinally ribbed, erect, c. 0.5-1 (2)m tall, with up to 16 thinner branches arranged in whorls at the nodes. Leaves scale-like, up to 10 mm, narrowly lanceolate with a single vein, often shiny-black with pale translucent margins, 1 per stemrib; 12-16 leaves unite for most of their length but with free black acuminate teeth and form a whorled sheath above each node. Strobili borne terminally on the main stem, oblong, 23 × 8 mm, with a blunt conical apex.


Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Mark Hyde, Bart Wursten and Petra Ballings

Source: Flora of Zimbabwe

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