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  1. Family: Acanthaceae Juss.
    1. Genus: Ruellia Plum. ex L.
      1. Ruellia burttii Vollesen

        This species is accepted, and its native range is Tanzania.

    [FTEA]

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

    Habit
    Perennial herb with several erect stems to 40 cm tall from woody rootstock; stems glabrous (with a fringe of hairs at nodes) to sparsely puberulous or with a few scattered curly hairs
    Leaves
    Leaves with petiole 0–10 mm long; lamina elliptic-obovate or narrowly so, largest 3.5–7 × 1–2.8 cm, apex acute to rounded, base attenuate to cuneate, decurrent on petiole, glabrous or with scattered hairs on midrib (rarely sparsely puberulous)
    Flowers
    Flowers in 2-flowered axillary cymes (flower away from stem developing first) or solitary towards apex; peduncle 0–2 mm long; pedicels 0–1 mm long, glabrous (rarely puberulous); bracts and bracteoles lanceolate to elliptic, 11–30 × 1–9 mm
    Calyx
    Calyx 8–10(–12) mm long, divided to 2–3 mm from base, glabrous with ciliate lobes or glabrous except for a terminal hair on each lobe
    Corolla
    Corolla opening in the evening, fallen by morning, white to pale mauve; tube 37–64 mm long of which the basal cylindric part 20–42 mm and the throat 13–22 mm long; lobes 12–16 × 11–16 mm, broadly ovate with entire to dentate crenate margin
    Stamens
    Stamens included in throat, didynamous, anthers slightly overlapping; filaments fused for 1–2 mm at base, free parts 2–4 and 4–6 mm long; anthers 2.5–4 mm long
    Ovary
    Ovary glabrous.
    Stigma
    Ventral stigma lobe 1–1.5 × ± 0.5 mm
    Fruits
    Capsule clavate, glabrous, 17–22 mm long, (4–)6–14seeded
    Seeds
    Seed broadly ellipsoid to circular, grey to brown, 4.5–5 × 4–4.5 mm
    Ecology
    Seasonally waterlogged short grassland on black cotton soil, Acacia drepanolobium grassland on clayey loam; 1100–1300 m
    Note
    According to Burtt 4596 this species is pollinated by hawkmoths. Closely related to the widespread and variable R. patula. It differs in the larger corolla, larger seeds and different inflorescence.
    Type
    Type: Tanzania, Dodoma District: Kazikazi, Burtt 4596 (K!, holo.)
    Distribution
    Flora districts: T1 T2 T5 Range: Not known elsewhere

    Images

    Distribution

    Native to:

    Tanzania

    Other Data

    Ruellia burttii Vollesen appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 2008 Burtt, B.D. [4596], Tanzania K000780535 holotype

    Bibliography

    First published in Fl. Trop. E. Africa, Acanth.(1): 209 (2008)

    Accepted by

    • Vollesen, K. (2008). Flora of Tropical East Africa, Acanthaceae(1): 1-285.

    Literature

    Kew Backbone Distributions

    • Vollesen, K. (2008). Flora of Tropical East Africa, Acanthaceae(1): 1-285.

    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