1. Family: Begoniaceae C.Agardh
    1. Genus: Begonia L.
      1. Begonia horticola Irmsch.

        This species is accepted, and its native range is Congo to DR Congo.

    [FTEA]

    Begoniaceae, Vanessa Plana, Martin J.S. Sands & Henk J. Beentje. Flora of Tropical East Africa. 2006

    Type
    Type: Congo-Kinshasa, wild in Botanic Garden of Eala, Chevalier 28045 (P, lecto., chosen by de Wilde).
    Habit
    Epiphyte or scrambling terrestrial; stem branched, up to 8 mm wide, rooting at the nodes, becoming woody at the base; indumentum of peltate scales with fimbriate margins.
    Stipules
    Stipules narrowly triangular, 1–2.4 cm long, persistent, not boat-shaped, keeled, apex acuminate, indumentum present on outside, glabrous within.
    Leaves
    Leaves thick, papery when dry, ± symmetrical or weakly oblique, elliptic to ovate, 6–14.5 × 3–7 cm, base obtuse to rounded, margin entire to remotely denticulate, apex acuminate, glabrous above, sparsely hairy beneath with dense indumentum on venation; venation pinnate; petiole 1.5–5 cm long, tomentose.
    Flowers
    Male flowers: tepals 4, free,  pink with dark red venation, the outer obovate to elliptic, 0.5–1.1 × 0.3–0.6 cm, the inner narrowly obovate, 0.3–0.7 × 0.1–0.3 cm; stamens 20–40, filaments fused at the base into a column; anthers narrowly ovoid, up to 3 mm long.
    Inflorescences
    Female inflorescence with 3 flowers, peduncle ± 1.4 cm long; bracts similar to those in male inflorescence. Female flowers: sessile at first, tepals 4, free, colour and shape as in the male flowers, the outer 8–10 mm long, the inner 5–9 mm; ovary fusiform, without wings, 3–4-locular; placentation septal; styles not persistent in fruit; 3–4, simple, unforked, glabrous, yellow at the base, becoming darker towards the red simple stigmatic apex. Inflorescence axillary, a unisexual dichasial cyme; male inflorescence with up to 15 flowers, peduncle 4–15 mm long, each ramification subtended by a pair of opposite chartaceous, usually connate bracts up to 5 mm long, smaller in the upper parts of the inflorescence, not boatshaped, apex acuminate; pedicels 0.4–1 cm long; bracteoles absent.
    Fruits
    Mature fruits with a pedicel up to 1.7 cm long, fleshy, fusiform, 3–5(–6) cm long, terete in cross section, reddish, dehiscent by longitudinal slits.
    Note
    de Wilde cites Purseglove 2674 from Uganda at K but says he has not seen the specimen. HJB has seen this specimen and thinks it is B. eminii. This would mean that B. horticola does not occur in East Africa, but could possibly be found there in future. It is however included in the key.
    Distribution
    Flora districts: Uganda (no specimens seen), Congo-Brazzaville, Congo-Kinshasa

    Images

    Distribution

    Doubtfully present in:

    Uganda

    Native to:

    Congo, Zaïre

    Begonia horticola Irmsch. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 1990 s.coll. [s.n.], Belgium K000761005 holotype

    First published in Bot. Jahrb. Syst. 57: 242 (1921)

    Accepted by

    • Lejoy, J., Ndjele, M.-B. & Geerinck, D. (2010). Catalogue-flore des plantes vasculaires des districts de Kisangani et de la Tshopo (RD Congo) Taxonomania. Revue de Taxonomie et de Nomenclature Botaniques 30: 1-307.
    • Govaerts, R. (1996). World Checklist of Seed Plants 2(1, 2): 1-492. MIM, Deurne.

    Literature

    Flora of Tropical East Africa
    • Wageningen Univ. Pap. 2001–2: 113 (2002).
    • F.C.B., Begoniaceae: 23 (1969)
    • E.J. 57(2): 242 (1921)

    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 2019. 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 2019. 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