Lythraceae
Ammannia

Ammannia pedicellata (Hiern) S.A.Graham & Gandhi

First published in Harvard Pap. Bot. 18: 79 (2013)
This species is accepted
The native range of this species is SE. Kenya to E. Tanzania (incl. Zanzibar). It is a subshrub and grows primarily in the seasonally dry tropical biome.

Descriptions

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

Lythraceae, B. Verdcourt. Flora of Tropical East Africa. 1984

Morphology General Habit
Erect or ascending glabrous herb 1–50 cm. tall or long, the short specimens erect; stems thickish, ± fleshy, 4-angled, sparsely branched, often rooting at basal nodes.
Morphology Leaves
Leaves decussate, narrowly elliptic or obovate, 0.6–4.2 cm. long, 0.2–1.5 cm. wide, ± obtuse at the apex, acute to obtuse at the base, ± 1-nerved.
Morphology Reproductive morphology Flowers
Flowers 4–numerous, heterostylous, probably trimorphic in (1–)3–5(–9)-flowered dichasia; lower peduncles 0.1–1.2 cm. long, others 0.5–2.5 mm.; pedicels 2.5–6 mm. long; bracteoles subulate or lanceolate, scarcely 1 mm. long. Short-styled flowers with longer stamens 4.5 mm. long, shorter 3.5 mm. long; style ± 1.25 mm. long. Intermediate-styled flowers with longer stamens just overtopping the stigma, shorter reachingjust below stigma; style ± 2.5 mm. long. Long-styled flowers with longer stamens 2/3-exserted, shorter reaching tips of calyx-lobes; style ± 4–5 mm. long, overtopping the longer sepals.
Morphology Reproductive morphology Flowers Calyx
Calyx ± 2.5 mm. long; lobes ± 0.8 mm. long, the alternating appendages 0.5 mm. long, spreading.
Morphology Reproductive morphology Flowers Corolla
Petals mauve, wine-red, or blue (fide Greenway), obovate, 3–4 mm. long, 1.5–4 mm. wide.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 8.
Long-styled
Long-styled flowers with longer stamens 2/3-exserted, shorter reaching tips of calyx-lobes; style ± 4–5 mm. long, overtopping the longer sepals.
Intermediate-styled
Intermediate-styled flowers with longer stamens just overtopping the stigma, shorter reachingjust below stigma; style ± 2.5 mm. long.
Short-styled
Short-styled flowers with longer stamens 4.5 mm. long, shorter 3.5 mm. long; style ± 1.25 mm. long.
Morphology Reproductive morphology Fruits
Capsule globose, not or scarcely exserted from the calyx.
Figures
Fig. 6/22–28, p. 17.
Habitat
Seasonally flooded freshwater swamps and swamps next to permanent lakes and streams with grasses, Cyperaceae, Aeschynomene, Ipomoea aquatica, etc.; forest on loam on coral and drainage ditches; persisting as a weed in rice-fields; 0–150 m.
Distribution
K7 T3 T6 Z not known elsewhere
[FTEA]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/179814/1591130

Conservation
VU - vulnerable
[IUCN]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • 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/

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2026. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 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 2026. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0