Aponogeton abyssinicus Hochst. ex A.Rich.

First published in Tent. Fl. Abyss. 2: 351 (1850)
This species is accepted
The native range of this species is Ethiopia to Malawi. 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, shortly cylindrical or irregularly shaped, 10–30 mm. long and 5–20 mm. thick, densely set with whitish roots above.
Morphology Leaves
Leaves few–many; petiole (except in var. graminifolius) 3–60 cm. long and 0.6–3 mm. thick, greenish, terete or somewhat compressed; blade usually oval to lanceolate, floating, with acute to obtuse tip and cuneate to truncate base, very rarely (only in var. cordatus) the base is prominently cordate, 3–12 cm. long and 0.5–5 cm. wide, green, but sometimes dark-spotted beneath; midrib very prominent on lower surface, parallel nerves 2–4 on each side of the midrib; very rarely the leaves sessile, linear and grass-like (in var. graminifolius).
Morphology Reproductive morphology Inflorescences
Inflorescence a bifid spike 10–50 mm. long and 2–8 mm. wide when flowering, with many usually densely set bisexual or female flowers facing in all directions; peduncles 5–45 cm. long and 1–5 mm. thick, terete or somewhat flattened, green to reddish; spathe 5–20 mm. long, pale green with darker longitudinal lines (and sometimes spots).
Morphology Reproductive morphology Flowers
Flowers usually consisting of 2 tepals, 6 stamens and 3 ovaries (rarely no stamens and up to 7 ovaries in apomictic plants).
Morphology Reproductive morphology Flowers Tepal
Tepals persistent or caducous, pinkish, mauve to bluish violet, rarely white (only in var. albiflorus), oval, obovate to ligulate, or with a narrow base and a wider upper part, 1–5 mm. long, with 1 nerve, rarely densely set with numerous reddish brown gland-dots (only in var. glanduliferus).
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 2–3 mm. long; filaments white or violet, somewhat thickened towards the base; anthers 0.2–0.4 mm. long and 0.2–0.3 mm. wide, violet to almost black, but pollen yellow.
Morphology Reproductive morphology Fruits
Follicles grey to brownish, 3–7 mm. long with a prominent 1–2 mm. long beak of the same colour as the remainder of the follicle or much darker, containing 4–14 ovules.
Morphology Reproductive morphology Seeds
Seeds elliptic to elongate, 0.7–1.5 mm. long and 0.2–0.4 mm. wide, with longitudinal ridges, but not prominently winged; testa double.
[FTEA]

M. Thulin et al. Flora of Somalia Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology Leaves
Leaf-blades ± long-petiolate, floating, ovate to lanceolate, 3–12 x 0.5–5 cm, acute to obtuse at the apex, cuneate to cordate at the base
Morphology Reproductive morphology Inflorescences
Mostly bisexual. Spikes 2-branched with branches 10–50 x 2–8 mm, dense, pedunculate
Morphology Reproductive morphology Flowers
Flowers mostly with 2 pinkish to purplish tepals, 6 stamens and 3, 4–14-ovulate carpels (rarely stamens absent and carpels up to 7 in apomictic plants)
Morphology Reproductive morphology Fruits
Follicles 3–7 mm long including 1–2 mm long beak
Morphology Reproductive morphology Seeds
Seeds 0.7–1.5 x 0.2–0.4 mm.
Vernacular
Muco (Somali)
Note
Var. abyssinicus is distributed in eastern Africa from Ethiopia southwards to south-eastern Zaire. Three further varieties were recognized by Lye in Lidia 1: 73–79 (1986), all in Kenya and Tanzania.
[FSOM]

M. Thulin et al. Flora of Somalia Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology Leaves
Leaf-blades ± long-petiolate, floating, ovate to lanceolate, with cordate base.
Morphology Reproductive morphology Inflorescences
Mostly bisexual. Spikes 2-branched with branches 10–50 x 2–8 mm, dense, pedunculate
Morphology Reproductive morphology Flowers
Flowers mostly with 2 pinkish to purplish tepals, 6 stamens and 3, 4–14-ovulate carpels (rarely stamens absent and carpels up to 7 in apomictic plants)
Morphology Reproductive morphology Fruits
Follicles 3–7 mm long including 1–2 mm long beak
Morphology Reproductive morphology Seeds
Seeds 0.7–1.5 x 0.2–0.4 mm.
Distribution
S1–3; E Kenya
Ecology
Altitude range 40–200 m.
Note
Var. abyssinicus is distributed in eastern Africa from Ethiopia southwards to south-eastern Zaire. Three further varieties were recognized by Lye in Lidia 1: 73–79 (1986), all in Kenya and Tanzania.
[FSOM]

Sources

  • Flora of Somalia

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

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

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/
  • 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