Aponogeton natalense Oliv.

Perennial rhizomatous aquatic, rosulate, 0.14-0.40 m high. Rhizomes elongate, up to 20 mm long, often with long rigid hairs, also developing stolons. Leaves submerged or floating, up to 300 mm long; blades narrowly lanceolate, up to 150 x 30 mm; 3 or 4 veins each side of midrib, apex pointed; blades narrowly obovate, tapering to rounded, 4 veins each side of midrib; floating leaves with petioles up to 0.9-3.0 m long. Inflorescence of 2 spikes, up to 55 mm long in flower, elongating up to 70 mm in fruit. Flowers spirally arranged crowded, scentless; perianth segments 2, petal-like, ovate to tongue-shaped, white, 3-veined. Flowering time Jan.-Mar., Sept. Seeds 2(4), with single coat, ± 6 mm long, plumule present.