1. Family: Balsaminaceae A.Rich.
    1. Genus: Impatiens Riv. ex L.
      1. Impatiens mahengeensis Grey-Wilson

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

    [FTEA]

    Balsaminaceae, C. Grey-Wilson. Flora of Tropical East Africa. 1993

    Habit
    Glabrous perennial herb up to 30 cm. tall; stems decumbent, rooting at the lower nodes, green flushed with pink or red.
    Leaves
    Leaves spirally arranged, deep green above, pale green beneath; petiole 1–6.2 cm. long, slender; lamina ovate to ovate-lanceolate or ovate-elliptic, 2–10.2 cm. long, 1.5–5 cm. broad, the base ± rounded or somewhat attenuate into the petiole, the apex acuminate, often shortly apiculate; lateral veins 3–7 pairs, linked together by a loose network of secondary veins; margin shallowly crenate, the crenations 4–10 mm. apart.
    Flowers
    Flowers solitary, epedunculate, borne in the axils of the uppermost leaves, mid to deep pink, whitish at the base of the lateral united petals and with a white spur.
    Calyx
    Lateral sepals 2, oblong, 5–6 mm. long, shortly apiculate. Lower sepal shallowly and rather obliquely navicular, 1.1–1.5 cm. long, abruptly constricted into a 4.4–6.1 cm. long, curved filiform spur, gradually tapering to the tip.
    Corolla
    Dorsal petal suborbicular, 12–17 mm. long, 16–20 mm. broad, emarginate, with a shallow crest on the posterior side. Lateral united petals 18–24 mm. long, the upper and lower petals of each pair about equal in size; upper petal broadly elliptic to kidney-shaped, 17–20 mm. long, 10–14 mm. broad, entire; lower petal broadly oval, 16–20 mm. long, 10–15 mm. broad, with a slight emargination distally along the inner margin.
    Ovary
    Ovary glabrous.
    Fruits
    Fruit unknown.
    Habitat
    Deeply shaded areas in rain-forest, particularly on stream banks or rocks, occasionally on fallen mossy branches; 1100–1300 m.
    Distribution
    T6 not known elsewhere

    Distribution

    Native to:

    Tanzania

    Impatiens mahengeensis Grey-Wilson appears in other Kew resources:

    First published in Kew Bull. 35: 184 (1980)

    Accepted by

    • Grey-Wilson, C. (1982). Flora of Tropical East Africa, Balsaminaceae: 1-76.

    Literature

    Kew Backbone Distributions
    • Grey-Wilson, C. (1982). Flora of Tropical East Africa, Balsaminaceae: 1-76.
    Flora of Tropical East Africa
    • Grey-Wilson in Kew Bulletin 35: 184, fig. 4 (1980).

    Sources

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