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

        This species is accepted, and its native range is Tanzania to S. Tropical Africa.

    [FZ]

    Begoniaceae, F. K. Kupicha. Flora Zambesiaca 4. 1978

    Habit
    Plants perennial, 5–33 cm. tall.
    Stem
    Stems erect, simple or sparsely branched, glabrous; basal tuber small, ellipsoid or globose, pinkish, densely covered with brown hairs.
    Leaves
    Leaves glabrous, petiolate; laminae 2–7(10) cm. long, ± sub-orbicular in outline, not or shallowly lobed, truncate to slightly cordate at the base; margins subentire, irregularly crenulate; petioles 0·4–3·5(7) cm. long; stipules 5–22 mm. long, broadly ovate to oblong-acute, brownish, membranous, entire-margined.
    Flowers
    Flowers in terminal and axillary dichasial cymes with 1–2 dichasia; peduncles 0·3–4·5 cm. long. Male flowers: tepals 2 + 2, pale to bright pink; outer pair 9–14 × 8–12 mm., suborbicular; inner pair 5–7 × 3–4 mm., obovate; filaments 1–2 mm. long. Female flowers: tepals 5, the outer 4 6–12 × 4–6 mm., elliptic to oblong, the innermost smaller; ovary 4–8 × 4–7 mm., ovoid; styles 2·2–3·5 mm. long, divided to 1/2 their length, the branches stigmatic and spirally twisted; placentae bifid.
    Bracts
    Bracts 1–2 mm. long, ovate, brownish, membranous.
    Male
    Male flowers: tepals 2 + 2, pale to bright pink; outer pair 9–14 × 8–12 mm., suborbicular; inner pair 5–7 × 3–4 mm., obovate; filaments 1–2 mm. long.
    Female
    Female flowers: tepals 5, the outer 4 6–12 × 4–6 mm., elliptic to oblong, the innermost smaller; ovary 4–8 × 4–7 mm., ovoid; styles 2·2–3·5 mm. long, divided to 1/2 their length, the branches stigmatic and spirally twisted; placentae bifid.
    Fruits
    Fruits 6–10 x 5–8 mm. excluding wings, globose, ovoid or ellipsoid; wings very unequal: largest 7–15 mm. wide, triangular, the upper edge at an acute or obtuse angle to the fruit axis; second and third wings much smaller.
    [FTEA]

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

    Ecology
    On steep rock or earth banks in moist and shaded places, occasionally on termitaria in woodland, twice described as an epiphyte; 750–1800(–2400) m.
    Conservation
    Least concern (LC); widespread .
    Note
    As the synonymy suggests, there is considerable variation in habit and morphological characters. Some specimens are leafy throughout, others are almost scapose with two leaves appressed to the ground.
    Type
    Type: Tanzania, Uhehe Plateau, Ubena, Prince 2 (B, holo.).
    Habit
    Perennial herb 5–60 cm high, erect and leafy, or, more rarely, scapose with basal leaves; stem simple or slightly branched, fleshy, red or pink, glabrous; basal tuber small, ellipsoid or globose, pink, covered in brown hairs.
    Stipules
    Stipules ovate, 5–22 mm long, with entire or remotely ciliate-serrate margins.
    Leaves
    Leaves green above, often red, purple or pink beneath, asymmetrically elliptic to suborbicular, 2–7.4 × 2–6(–8.4) cm, base truncate to slightly cordate, margin shallowly lobed, irregularly crenulate, apex acute to acuminate, glabrous; venation palmate; petiole 0.4–3.5(–5) cm long.
    Flowers
    Male flowers: tepals 4, pink, the outer suborbicular, 9–16 × 8–14 mm, the inner obovate, 5–11 × 3–6 mm; stamens 40–60, filaments 1–3 mm long, free, anthers ellipsoid, ± 1 mm long. Female flowers:  tepals (3–)5, pink, the outer four elliptic to oblong, 6–13 × 4–10 mm, the innermost smaller; ovary ovoid, 4–12 × 3–7 mm, 3locular, 3-winged; placentation axile, bilamellate; styles three, 2.2–3.5 mm long, persistent, divided halfway, the branches twisted with a continuous spiral stigmatic band. Fruit pinkish, globose, ovoid or ellipsoid, 6–14 × 5–10 mm excluding the wings; wings very unequal, the largest broadly triangular, 11–15 mm wide, rounded to acute, the other two to 10 mm wide, rounded; dehiscence along the junction with the wing. Flowers in axillary and terminal bisexual cymes with 1–2 dichasia; peduncle 3–45 mm long; bracts ovate, 1–14 mm long, acute, persistent; pedicels 8–25 mm long; bracteoles absent.
    Distribution
    Flora districts: T4 T7 Range: Congo-Kinshasa, Angola, Zambia, Malawi, Mozambique

    Images

    Distribution

    Native to:

    Angola, Malawi, Mozambique, Tanzania, Zambia, Zaïre

    Begonia princeae Gilg appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 1975 Richards, H.M. [8255], Zimbabwe K000242758 holotype
    Jan 1, 1975 Richards, H.M. [8255], Zimbabwe K000242759
    Milne-Redhead, E. [3670], Zambia 11567.000
    Bullock, A.A. [2135], Zambia 5177.000
    Masson, E.W., Zambia 5178.000
    Homble [956] K000313651 Unknown type material
    Wellman, F.C. [1765], Angola Begonia wellmannii K000242747

    First published in Bot. Jahrb. Syst. 30: 361 (1901)

    Accepted by

    • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
    • Govaerts, R. (1996). World Checklist of Seed Plants 2(1, 2): 1-492. MIM, Deurne.

    Literature

    Flora of Tropical East Africa
    • F.Z. 4: 501 (1978).
    • F.C.B., Begoniaceae: 44 (1969)
    • E.J. 81: 114 (1961)

    Sources

    Flora Zambesiaca
    Flora Zambesiaca
    http://creativecommons.org/licenses/by-nc-sa/3.0

    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