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  1. Family: Acanthaceae Juss.
    1. Genus: Ruellia Plum. ex L.
      1. Ruellia amabilis S.Moore

        This species is accepted, and its native range is SW. Ethiopia to NE. Tanzania.

    [FTEA]

    Acanthaceae (part 2), Kaj Vollesen. Flora of Tropical East Africa. 2008

    Type
    Type: Kenya, Teita District: Teita, Voi River, Hildebrandt 2480 (BM!, holo.; K!, P!, iso.)
    Habit
    Scandent or trailing shrubby herb to 2 m tall; young stems pubescent to pilose or sparsely so with shiny white hairs and with shorter glandular and non-glandular hairs
    Leaves
    Leaves with petiole 0.5–5.5 cm long; lamina ovate to cordiform, largest 4–8.5 × 2.5–6.5 cm, apex gradually or abruptly narrowed into an acute to acuminate tip, base truncate to cordate, puberulous to pubescent or sparsely so, densest along veins, and with scattered glands
    Flowers
    Flowers solitary or in 3-flowered axillary cymes; pedicels (peduncles in cymes) 8–20(–25) mm long; bracteoles (bracts in cymes) linear to slightly spathulate, caducous, 7–14 × ± 1 mm
    Calyx
    Calyx 22–26 mm long, divided to 2–3 mm from base, puberulous with glandular and non-glandular hairs and with scattered to dense longer pilose hairs; lobes filiform
    Corolla
    Corolla opening in the evening, fallen by early morning, pure white; tube 6.5–8.5 cm long of which the basal cylindric part 5.5–7.5 cm and the throat ± 1 cm long; lobes 13–17 × 12–18 mm, broadly ovatereniform with rounded apex
    Stamens
    Stamens exserted, didynamous; filaments fused for 1–2 mm at base, free parts 6–9 and 9–12 mm long, glabrous; anthers 4–5 mm long
    Ovary
    Ovary with dense short-stalked capitate glands.
    Stigma
    Ventral stigma lobe 1.5–2 × ± 0.5 mm, dorsal 0.5–1 mm long
    Fruits
    Capsule clavate, glandular-puberulous or sparsely so all over, 24–30 mm long, 6–8-seeded
    Seeds
    Seed oblong to orbicular, brown, 3.5–4 × 3–3.5 mm
    Ecology
    Undergrowth of evergreen lowland forest and riverine forest; 25–450 m (but clearly higher in NW Kenya).
    Note
    The Ethiopian material has much larger flowers than the East African material and should possibly be considered a distinct subspecies.
    Distribution
    Range: Ethiopia Flora districts: K1 K2 K7 T3

    Images

    Distribution

    Native to:

    Ethiopia, Kenya, Tanzania

    Other Data

    Ruellia amabilis S.Moore appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Hildebrandt, J.M. [2480], Kenya K000393964 isotype

    Bibliography

    First published in J. Bot. 18: 7 (1880)

    Accepted by

    • Vollesen, K. (2008). Flora of Tropical East Africa, Acanthaceae(1): 1-285.
    • Hedberg, I., Kelbessa, E., Edwards, S., Demissew, S. & Persson, E. (eds.) (2006). Flora of Ethiopia and Eritrea 5: 1-690. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.

    Literature

    Kew Backbone Distributions

    • Hedberg, I., Kelbessa, E., Edwards, S., Demissew, S. & Persson, E. (eds.) (2006). Flora of Ethiopia and Eritrea 5: 1-690. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.

    Flora of Tropical East Africa

    • F.E.E. 5: 393 (2006).
    • Lebrun & Stork, Enum. Pl. Afr. Trop. 4: 501 (1997)
    • F.T.A. 5: 47 (1899)
    • E. & P. Pf. IV, 3b: 309 (1895)
    • P.O.A. C: 368 (1895)
    • J.B. 18: 7 (1880)

    Sources

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

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    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 Selected Plant Families 2020. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0