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  1. Family: Vitaceae Juss.
    1. Genus: Cissus L.
      1. Cissus humbertii Robyns & Lawalrée

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

    [FTEA]

    Vitaceae, Bernard Verdcourt. Flora of Tropical East Africa. 1993

    Habit
    Woody liane 2–3(–10) m. long; stems dark, ± 4-angled, striate, glabrous; tendrils present, bifid.
    Leaves
    Leaves elliptic, oblong-elliptic or ovate–oblong, 4–11 (–16) cm. long, 2–6.5(– 8.5) cm. wide, shortly to distinctly acuminate at the apex and acute at extreme tip, very broadly cuneate at the base, margins acutely ± distantly antrorsely denticulate with the teeth narrow, or sometimes with larger spreading teeth, 3–5-nerved at base of lamina, reticulately venose and glabrous above, usually with pubescent domatia in nerve-axils beneath; petiole slender, 0.8–4 cm. long, shiny; stipules ovate, 2.5–3 mm. long, 2–3 mm. wide, thin, glabrous but erose at margin, deciduous.
    Inflorescences
    Cymes leaf-opposed, 3.5–5 cm. long and wide, each umbelliform element 3–5-flowered; peduncles 1.5–2.2 cm. long; pedicels slender, 2–4 mm. long, becoming 6(–?10) mm. in fruit; bracts and bracteoles triangular, 1.5 mm. long, 1 mm. wide.
    Buds
    Buds ovoid or subcylindrical, 1.5–3 mm. long, rounded at the apex, glabrous.
    Calyx
    Calyx cupular, 0.5 mm. long, with 4 rounded lobes, glabrous.
    Corolla
    Petals greenish or pale yellow, ovate, 2 mm. long, 1 mm. wide.
    Ovary
    Ovary 1 mm. long, glabrous.
    Fruits
    Fruits obovoid or ellipsoid, 7.5–9 mm. long, 7 mm. wide, glabrous.
    Seeds
    Seeds dark reddish brown, ovoid, 7–8 mm. long, 5–6 mm. wide, narrowed at point of attachment, median flat ridge on one side and fine depressed median line on the other, the rest of the surface rugulose (brain-like) (or tuberculate fide Dewit).
    Habitat
    Forest and forest patch near lakeside; 1500–1700 (–2460 in Rwanda) m.
    Distribution
    K5 U2

    Distribution

    Native to:

    Kenya, Rwanda, Uganda, Zaïre

    Other Data

    Cissus humbertii Robyns & Lawalrée appears in other Kew resources:

    Bibliography

    First published in Bull. Jard. Bot. État Bruxelles 18: 271 (1947)

    Accepted by

    • Fischer, E., Rembold, K., Althof, A. & Obholzer, J. (2010). Annotated checklist of the vascular plants of Kakamega forest, Western province, Kenya Journal of East African Natural History 99: 129-226.
    • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne.
    • Verdcourt, B. (1993). Flora of Tropical East Africa, Vitaceae: 1-149.
    • Robyns, W. & al. (eds.) (1948-1963). Flore du Congo Belge et du Ruanda-Urundi 1-10.

    Literature

    Flora of Tropical East Africa

    • Reekmans in Fl. Rwanda 2: 361, fig. 115.4 (1983).
    • Dewit in Flore du Congo Belge et du Ruanda-Urundi, 9: 526 (1960).
    • Robyns in Flore des Spermatophytes du Parc National Albert. 1:556 (1948).
    • Robyns & Lawalrée in Bulletin du Jardin Botanique de l'État a Bruxelles 18: 271 (1947).

    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 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