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  1. Family: Balsaminaceae A.Rich.
    1. Genus: Impatiens Riv. ex L.
      1. Impatiens assurgens Baker

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

    [FTEA]

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

    Habit
    Annual or perennial 10–60(–80) cm. tall, with simple erect or few-branched stems arising from a crown subtended by a number of fleshy thong-like roots; stems glabrous or pubescent on the younger parts; rootstock with fleshy thong and fibrous roots.
    Leaves
    Leaves opposite, rarely ternate, often crowded toward the tops of the stems, sessile or subsessile, the petiole, when present, not exceeding 4–5 mm. in length; lamina oblong, ovate, lanceolate to elliptic or suborbicular, 1.5–6.5(–9) cm. long, (0.2–)0.4–2.2(–2.5) cm. broad, the lower ones often broader and shorter than the upper, usually chartaceous, the base rounded, sometimes subcordate, the apex acute to subobtuse, sometimes ± acuminate, glabrous or pubescent to sometimes almost lanate on both surfaces; margin shallowly serrulate-denticulate to serrate; lateral veins 5–9 pairs, obscure.
    Flowers
    Flowers solitary or in axillary fascicles of 2–3, epedunculate, white, pale pink or mauve, often with an orange-yellow spot on each lateral united petal towards the base, spur often reddish towards the tip.
    Bracts
    Bracts lanceolate-triangular to subulate, 1–2 mm. long, inconspicuous.
    Pedicel
    Pedicels 3.3–6.5 cm. long, glabrous or pubescent.
    Calyx
    Lateral sepals ovate-lanceolate, 3–6 mm. long, 1–2 mm. broad, acute, glabrous. Lower sepal obliquely navicular, 10–12 mm. long, 5–8 mm. deep, ± abruptly constricted into a 3–10 mm. long straight or slightly curved spur, usually tapered to a fine tip, glabrous.
    Corolla
    Lateral united petals 15–28 mm. long; upper petal oblong, obovate or oval, 7–9 mm. long, 5–7 mm. broad, entire, about one-third to a half the size of the lower; lower petal transversely and obliquely elliptic, 9–15 mm. long, 6–11 mm. broad, distally with a slight emargination along the inner margin. Dorsal petal 8–12 mm. long, 5–8 mm. broad (not flattened), cucullate, dorsally with a narrow crest terminating in a short point, usually glabrous, but sometimes slightly pubescent on the crest.
    Ovary
    Ovary glabrous.
    Fruits
    Fruit fusiform, 9–15 mm. long, 3–5.5 mm. broad, glabrous.
    Habitat
    In moist shaded or often exposed places, particularly in upland grassland and bushland, but also along track and riversides and in open Brachystegia woodland; 840–2600 m.
    Distribution
    T1 T4 T7 T8
    [FZ]

    Balsaminaceae, E. Launert. Flora Zambesiaca 2:1. 1963

    Habit
    Annual or perennial juicy herb (5) 10–60 (80) cm. high or more, usually erect; stems simple or little branched, glabrous or pubescent mainly on younger parts.
    Leaves
    Leaves opposite, rarely in threes, sometimes ± densely crowded on the upper part of the stem, sessile or shortly petiolate; lamina (1·5) 2·5–7 (10) × (0·3) 0·8–2 (3) cm., linear, lanceolate, ovate or elliptic to (rarely) subcircular, the lower ones often much broader than long and shorter than the higher ones, chartaceous or thinly chartaceous, usually glabrous but sometimes pubescent on both surfaces, dark green on the upper, greyish-green or glaucous on the lower surface, apex acute or obtuse, margins slightly crenate-denticulate, base cuneate to rounded or very rarely subcordate; petiole 0·2–0·5 cm. long, pubescent or glabrous.
    Flowers
    Flowers solitary, very rarely in pairs, axillary, usually white but sometimes white with yellow spots (raised honey guides) inside and a pinkish spur, pink or often with an orange throat; pedicel 2–5 (7) cm. long, glabrous or pubescent; bracts very short, lanceolate-triangular, acute.
    Calyx
    Lateral sepals 3–5 × 0·7–2 mm., lanceolate to broad-lanceolate (rarely triangular-lanceolate) usually glabrous; posterior sepal broadly and obliquely infundibuliform, 4–10 mm. deep (excluding the spur), up to 1·3 cm. in diam. at the mouth, abruptly constricted into the spur, distally acute; spur 4–10 mm. long, slightly incurved or more rarely straight, usually tapering into a fine point (see t. 26 figs. 2–3).
    Corolla
    Anterior petal 8–12 × 8–12 mm. (when flattened), dorsally with a slender crest, glabrous or with a row of ± stiff white hairs on the crest; crest terminating in an acute or bluntish point. Lateral pair of united petals 15–20 (25) mm. long, deeply 2-lobed; anterior lobe 9–15 × 6–9 mm., transversely broadly oblique-obovate, rarely obtrapeziform; posterior lobe about 1/2 to 2/3 the size of the anterior one, oblique-obovate to broadly obdeltate (see t. 26 fig. 24).
    Ovary
    Ovary glabrous.
    Fruits
    Capsule 0·9–1·5 cm. long, fusiform, glabrous or rarely sparsely hairy when young.
    Seeds
    Seeds numerous, c. 1·6 mm. in diam., broadly elliptic in outline, laterally slightly flattened, rusty or dark brown, with a densely papillose surface, glabrous.

    Distribution

    Native to:

    Angola, Burundi, Malawi, Mozambique, Tanzania, Zambia, Zaïre

    Synonyms

    Other Data

    Impatiens assurgens Baker appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Milne-Redhead, E. [8315], Tanzania 23409.000
    Milne-Redhead, E. [7901], Tanzania 25120.000
    Verdcourt, B. [3426], Tanzania 34152.000
    Robson, N.K.B. [1522], Malawi 25632.000
    Robson, N.K.B. [451], Malawi 25904.000
    Brummitt, R.K. [11059], Malawi 25694.082
    Brummitt, R.K. [10478], Malawi 25694.098
    Brummitt, R.K. [10720], Malawi 25694.115
    Brummitt, R.K. [9444], Malawi 25694.204

    Bibliography

    First published in Bull. Misc. Inform. Kew 1895: 64 (1895)

    Accepted by

    • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
    • Grey-Wilson, C. (1982). Flora of Tropical East Africa, Balsaminaceae: 1-76.
    • Exell, A.W., Fernandes, A. & Wild, H. (eds.) (1963). Flora Zambesiaca 2(1): 1-351. Royal Botanic Gardens, Kew.
    • Robyns, W. & al. (eds.) (1948-1963). Flore du Congo Belge et du Ruanda-Urundi 1-10.

    Literature

    Kew Backbone Distributions

    • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
    • Grey-Wilson, C. (1982). Flora of Tropical East Africa, Balsaminaceae: 1-76.
    • Exell, A.W., Fernandes, A. & Wild, H. (eds.) (1963). Flora Zambesiaca 2(1): 1-351. Royal Botanic Gardens, Kew.

    Flora of Tropical East Africa

    • Grey-Wilson, Impat. Afr.: 174, fig. 113, pl. 37 (1980).
    • Launert in Flora Zambesiaca 2: 168, t. 26/2–3 (1963).
    • Wilczek & Schulze in Flore du Congo Belge et du Ruanda-Urundi, 9: 401, t. 41 (1960).
    • G.M. Schulze in Consp. Fl. Angol. 2: 156 (1956).
    • G.M. Schulze in Bol. Soc. Brot. sér. 2, 29: 10 (1955)
    • Brenan in Mem. N.Y. Bot. Gard. 8 (3): 231 (1953).
    • G.M. Schulze in Notizblatt des Botanischen Gartens und Museums zu Berlin-Dahelm 12: 74 (1935).
    • Gilg in A. Engler, Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 43: 99 (1909).
    • Bak. f. in Bulletin of Miscellaneous Information, Kew 1895: 64 (1895).
    • Warb. in A. Engler, Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 22: 47 (1895), in adnot.

    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.

    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