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

      1. Begonia zimmermannii Peter ex Irmsch.

        This species is accepted, and its native range is Tanzania (Usambara Mountains).

    [FTEA]

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

    Type
    Type: Tanzania, Lushoto District: Usambara, Amani, Greenway 1045 (K!, holo.; B, EA!, K!, PRE, WAG, iso.) .
    Habit
    Epiphytic herb, erect or reclinate; stems up to 1.5 cm thick, little branched, rooting at the nodes in older stems; indumentum of peltate scales with fimbriate margins.
    Stipules
    Stipules narrowly triangular ± 3.5 cm long, caducous, weakly boat-shaped, curved, apex acuminate, indumentum present on outside, glabrous within.
    Leaves
    Leaves thick and fleshy, leathery, asymmetrical, weakly falcate, obliquely ovate to elliptic, 10–15 × 5–8 cm, base weakly cordate to rounded, margin entire, apex obtuse to shortly acuminate, glabrescent above and below, with a few scattered hairs; venation pinnate; petiole 1.5–2.8(–4) cm long.
    Inflorescences
    Inflorescence axillary, a bisexual dichasial cyme, with up to 11 flowers; peduncle 0.5–1.7 cm long, densely squamose-stellate hairy; each ramification subtended by a pair of opposite weakly boat-shaped elliptic bracts 2–2.5 cm long, chartaceous, with conspicuous veins, apex acuminate, caducous; pedicels (♂ only) 0.5–1.2 cm long; bracteoles absent.
    Flowers
    Female flowers: tepals 4, free, white, the outer orbicular, 0.4–0.7 cm in diameter, the inner 0.2–0.35 × 0.15–0.2 cm; ovary fusiform, without wings, 4-locular; placentation unknown, probably parietal; styles 4, shortly forked at the apex, glabrous, not persistent in fruit; stigmatic band yellow, horseshoe-shaped, not twisted. Male flowers: tepals 4, free, the outer broadly elliptic, 0.7–1.3 × 0.6–1 cm, the inner obovate, boat-shaped, 0.5–0.7 × 0.3–0.4 cm; stamens 17–19, filaments free or fused at the base; anthers oblong, 1–2 mm long.
    Fruits
    Fruits sessile, fleshy, fusiform, 4.6–5(–6) cm long, terete in cross section, indehiscent, with a distinct apical scar where tepals and styles have fallen off.
    Ecology
    Moist forest; ± 900 m.
    Conservation
    Vulnerable (VU); very rare in its single locality, known only from three specimens .
    Distribution
    Flora districts: T3 Range: Not known elsewhere

    Images

    Distribution

    Native to:

    Tanzania

    Begonia zimmermannii Peter ex Irmsch. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 1989 Greenway, P.G. [1045], Tanzania K000242771
    Jan 1, 1989 Greenway, P.G. [1045], Tanzania K000242770 holotype

    First published in Bot. Jahrb. Syst. 81: 181 (1961)

    Accepted by

    • Govaerts, R. (1996). World Checklist of Seed Plants 2(1, 2): 1-492. MIM, Deurne.

    Literature

    Flora of Tropical East Africa
    • Wageningen Univ. Papers 2001-2: 242, fig. 30, map 30 (2002).
    • E.J. 81: 181 (1961)

    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