Aponogeton rehmannii Oliv.

Plants monoecious.. Tuber oval or irregularly shaped, 15–40 mm. long and 10–25 mm. thick, densely set with white or brownish roots in upper part.. Leaves few–many (usually 5–10 fresh leaves per plant); petiole 3–30 cm. long and 1–3 mm. thick, usually prominent, but occasionally soft juvenile linear leaves without stalk and blade are produced; blade usually floating on the surface of the water, oval to linear-lanceolate, 3–10 cm. long and 0.3–2.5 cm. wide (East African plants have 3–8 mm. wide blades), with apiculate or subacute tip and cuneate or somewhat rounded base, sometimes strongly attenuate; midrib prominent and with 2–3 weak parallel nerves on each side of the midrib.. Flowers white, densely set in bifid spikes with the flowers facing in all directions; penducles 5–30 cm. long and 0.5–2 mm. thick, green to olive-brown with white or purplish base, not thickened below the inflorescence; spathe up to 10 mm. long, very early caducous.. Spikes bisexual, densely-flowered, 0.5–2.5 cm. long and 4–6(–9 in fruit) mm. wide.. Tepals 1–2, white or with a faint pinkish tinge, ovate or obovate, 2–4 mm. long and 0.7–2 mm. wide, 1-nerved.. Stamens 6, but often lacking since the plants are often apomictic.. Ovaries 3–6, grey to purplish when young; ovules 2–6.. Follicles 5–6 mm. long and ± 3 mm. wide, greyish brown with whitish beak.. Seeds cylindrical, straight or slightly curved, 2.5–3.8 mm. long and 0.8–1.2 mm. wide, greyish green, without longitudinal ridges; testa simple.

It is a subtropical plant. It grows in hot dry places. It grows in places with a long dry season of 6-11 months. In Southern Africa is grows between 825-1,300 m above sea level. It can grow in arid places.

The tubers are eaten raw as well as roasted.