Hydroleaceae
Hydrolea

Hydrolea sansibarica Gilg

First published in H.G.A.Engler (ed.), Pflanzenw. Ost-Afrikas, C: 335 (1895)
This species is accepted
The native range of this species is Tanzania (incl. Zanzibar). It is an annual 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: threatened. Confidence: confident
[AERP]

Hydrophyllaceae, B. Verdcourt. Flora of Tropical East Africa. 1989

Morphology General Habit
Annual herb (3-)10–60 cm. tall, with slender hollow stems, simple and glabrous beneath, ± branched and glandular-pubescent above.
Morphology Leaves
Leaf-blade lanceolate, 1–9 cm. long, 0.3–1.2 cm. wide, acute at the apex, cuneate at the base, glabrous; petiole 1–3 mm. long.
Morphology Reproductive morphology Inflorescences
Inflorescences 5–15 cm. long, 4–13 cm. wide, glandular-pubescent on the axes, bracts and pedicels, etc.; inflorescence-branches 2.5–5 cm. long, bearing rather compact trichotomous cymes; pedicels 2–8(–12) mm. long.
Morphology Reproductive morphology Flowers Calyx
Sepals lanceolate, 3–4.5 mm. long, 1 mm. wide, acuminate, glandular-pubescent.
Morphology Reproductive morphology Flowers Corolla
Corolla blue; lobes elliptic-ovate, 3 mm. long, 2 mm. wide, rounded, glabrous.
Morphology Reproductive morphology Flowers Androecium Stamens
Filaments 1.5–2 mm. long, filiform with a broadly ovate-triangular dilated base; anthers 1–1.3 mm. long with little-developed lobes.
Morphology Reproductive morphology Flowers Disc
Disk 1 mm. diameter.
Morphology Reproductive morphology Flowers Gynoecium Style
Styles 0.7–1 mm. long.
Morphology Reproductive morphology Fruits
Capsule globose-ovoid, 3–4 mm. long.
Figures
Fig. 1/1–8.
Habitat
Avicennia salt-marshes, in association with Cyperaceae, Sporobolus, Dactyloctenium, Utricularia, etc., wet bottoms in coastal bushland, rice-fields, etc.; 0–150 m.
Distribution
T3 T6 T8 Z not known elsewhere
[FTEA]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/179517/1581295

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

  • 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 2025. 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 2025. 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