Aponogeton rehmannii Oliv.

First published in Hooker's Icon. Pl. 15: t. 1471B (1884)
This species is accepted
The native range of this species is Kenya to S. Africa. It is a tuberous hydrogeophyte and grows primarily in the seasonally dry tropical biome.

Descriptions

Aponogetonaceae, K.A. Lye (Agricultural University of Norway). Flora of Tropical East Africa. 1989

Morphology General Habit
Plants monoecious.
Vegetative Multiplication Tubers
Tuber oval or irregularly shaped, 15–40 mm. long and 10–25 mm. thick, densely set with white or brownish roots in upper part.
Morphology Leaves
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.
Morphology Reproductive morphology Flowers
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.
Morphology Reproductive morphology Inflorescences
Spikes bisexual, densely-flowered, 0.5–2.5 cm. long and 4–6(–9 in fruit) mm. wide.
Morphology Reproductive morphology Flowers Tepal
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.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 6, but often lacking since the plants are often apomictic.
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovaries 3–6, grey to purplish when young; ovules 2–6.
Morphology Reproductive morphology Fruits
Follicles 5–6 mm. long and ± 3 mm. wide, greyish brown with whitish beak.
Morphology Reproductive morphology Seeds
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.
Habitat
Seasonal pools in rock pavement, or other temporary gatherings of water; 1450 m.
Distribution
K4 but not yet found in Tanzania
[FTEA]

Common Names

English
Pondweed

Sources

  • Flora of Tropical East Africa

    • Flora of Tropical East Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Herbarium Catalogue Specimens

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Plants and People Africa

    • Common Names from Plants and People Africa http://www.plantsandpeopleafrica.com/
    • © Plants and People Africa http://www.plantsandpeopleafrica.com http://creativecommons.org/licenses/by/3.0/