1. Family: Urticaceae Juss.
    1. Genus: Urtica L.
      1. Urtica massaica Mildbr.

        This species is accepted, and its native range is E. Central & E. Tropical Africa.

    [FTEA]

    Urticaceae, I. Friis University of Copenhagen, Denmark. Flora of Tropical East Africa. 1989

    Habit
    Erect perennial dioecious herb up to 2 m. tall, with little-branched ± quadrangular stems, forming loose clumps from a creeping rhizome; all parts of plant with fiercely stinging hairs 1.5–2 mm. long, raised on protuberances ± 1 mm. high, otherwise glabrous to puberulous.
    Leaves
    Leaves:stipules fused, interpetiolar, (0.8–)l–2 cm. long, 0.4–1 cm. wide, with rounded apex and broadly cuneate to cordate base, chartaceous, brown; petioles 1.5–4.5 cm. long; lamina ovate, 7–13 cm. long, 6–10.5 cm. wide, base cordate, margin serrate or usually double serrate, with numerous teeth on each side, apex acute to shortly acuminate; lateral nerves 6–9 pairs, lower 2–3 pairs running into subcordate leaf-base, all pairs extending to leaf-margin and linked by a fine net of anastomosing nerves; upper surface with stinging hairs and sometimes also a fine pubescence, cystoliths very numerous, punctiform, lower surface with stinging hairs along the nerves.
    Inflorescences
    Inflorescences paired in the axils of the upper leaves, spike-like, 2.5–4.5 cm. long, with the flowers in small, densely cymose, bracted glomerules, sometimes the inflorescence with a few side-branches near the base.
    Male
    Male flowers on pedicels 0.8–1.5 mm. long; perianth ± 1 mm. in diameter, puberulous to pubescent, occasionally with a few stinging hairs, depressed globose in bud.
    Flowers
    Female flowers sessile; perianth ± 1 mm. long, pubescent, with numerous stinging hairs on the large pair of tepals. Male flowers on pedicels 0.8–1.5 mm. long; perianth ± 1 mm. in diameter, puberulous to pubescent, occasionally with a few stinging hairs, depressed globose in bud.
    Female
    Female flowers sessile; perianth ± 1 mm. long, pubescent, with numerous stinging hairs on the large pair of tepals.
    Fruits
    Achene flattened, ovoid, ± 1 mm. long, 0.8 mm. wide, white, long enclosed in the persistent perianth but dispersed without it.
    Figures
    Fig. 1.
    Habitat
    Clearings and natural open glades in upland rain-forest and moist evergreen bushland, often near human dwellings, especially where cattle are kept; (400–) 1500–3250 m.
    Distribution
    K1 K3 K4 K6 T2 T3 U2 U4

    Distribution

    Native to:

    Burundi, Kenya, Rwanda, Tanzania, Uganda, Zaïre

    Urtica massaica Mildbr. appears in other Kew resources:

    First published in Notizbl. Bot. Gart. Berlin-Dahlem 8: 275 (1923)

    Accepted by

    • Friis, I. (1989). Flora of Tropical East Africa, Urticaceae: 1-64.
    • Troupin, G. (ed.) (1978). Flora du Rwanda 1: 1-413. Musee Royal de l'Afrique Centrale.
    • Lewalle, J. (1970). Liste floristique et répartition altitudinale de la flore du Burundi occidental: 1-84. Université officielle de Bujumbura.

    Literature

    Kew Backbone Distributions
    • Friis, I. (1989). Flora of Tropical East Africa, Urticaceae: 1-64.
    • Troupin, G. (ed.) (1978). Flora du Rwanda 1: 1-413. Musee Royal de l'Afrique Centrale.
    • Lewalle, J. (1970). Liste floristique et répartition altitudinale de la flore du Burundi occidental: 1-84. Université officielle de Bujumbura.
    Flora of Tropical East Africa
    • Troupin, Fl. Rwanda 1: 153, fig. 30/3A–C (1978).
    • A.D.Q. Agnew, Upland Kenya Wild Flowers p. 321 (1974).
    • O. Hedberg, Afroalpine Vascular Plants p. 72 (1957).
    • Hauman in Flore du Congo Belge et du Ruanda-Urundi, 1: 180 (1948).
    • Peter, Flora von Deutsch-Ostafrika 2: 116 & Appendix: 10, t. 13/A–E (1932).
    • Mildbr. in Notizblatt des Botanischen Gartens und Museums zu Berlin-Dahelm 8: 275 (1923).

    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