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  1. Family: Rubiaceae Juss.
    1. Genus: Rothmannia Thunb.
      1. Rothmannia macrosiphon (K.Schum.) Bridson

        This species is accepted, and its native range is SE. Kenya to E. Tanzania.


    Rubiaceae, B. Verdcourt. Flora of Tropical East Africa. 1976

    Bush or small tree 1.8–7 m. tall; young stems glabrescent to finely velutinous.
    Leaf-blades oblanceolate to obovate, 4.5–14.4 cm. long, 2–6.8 cm. wide, apex acuminate, base cuneate, coriaceous, glabrous above, glabrous to glabrescent beneath with midrib sparsely pubescent; domatia absent; petioles 0.2–1.3 cm. long, sparsely pubescent; stipules triangular, acuminate, 3–5 mm. long, caducous.
    Flowers sweetly scented, solitary, terminal above a single leaf; peduncle 0.5–1.6 cm. long, pubescent, bearing 2–6 acute triangular bracteoles 2–6 mm. long.
    Calyx golden or reddish-brown pubescent; tube 10-grooved, 0.9–1.4 cm. long; limb-tube 0.4–1.1 cm. long, wider than the tube; lobes linear, 1.6–3.2 cm. long, 1.5–2 mm. wide, ± equal.
    Corolla white with reddish purple spots in throat, golden to buff pubescent outside when dry; tube long, narrowly cylindrical below, campanulate above, 11–24 cm. long, the campanulate part 3.8–6.2 cm. long, 3.1–4.5 cm. wide at top, 3–6 mm. wide at base, glabrous within, the cylindrical portion pubescent within; lobes overlapping to left in bud, ovate, 1.3–2.6 cm. long, (1.2–)1.8–3 cm. wide, rounded or obtuse, whitish tomentose above.
    Anthers well-included, 2–3 cm. long.
    Style ± 11–18 cm. long, gradually widening to apex; stigma well-included, 2–3 cm. long, 3–4 mm. wide.
    Fruit ± ovoid, 2.5–3.2 cm. long, 2–2.2 cm. wide, not or sometimes slightly ribbed, golden pubescent, the calyx-limb and sometimes corolla persistent (perhaps not fully mature).
    Seeds not known.
    Forest; 60–450 m.
    K7 T3 T6 T8 not known elsewhere



    Native to:

    Kenya, Tanzania

    Other Data

    Rothmannia macrosiphon (K.Schum.) Bridson appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jul 1, 1980 Semsei, S.R. [711], Tanzania K000352654
    Dec 1, 1978 Peter, A. [56063], Tanzania K000352650
    Dec 1, 1978 Napper, D.M. [1384], Kenya K000352642
    Oct 11, 1978 Vollesen, K.B. [4342], Tanzania K000352651
    Drummond, R.B. [3875], Kenya K000352638
    Drummond, R.B. [3875], Kenya K000352639
    Drummond, R.B. [3938], Kenya K000352640
    Drummond, R.B. [3938], Kenya K000352641
    Moreau, R.E. [303], Tanzania K000352648
    Faulkner, H.G. [3831], Tanzania K000352647
    Peter, A. [56065], Tanzania K000352649
    Luke, W.R.Q. [1676], Kenya K000352636
    Holst, C. [3179], Tanzania K000352652 isosyntype
    Magogo, F.C. [856], Kenya K000352637
    Shabani [640], Tanzania K000352646
    Kokwaro, J.O. [3930], Kenya K000352643
    Saufferer, S. [784], Kenya K000352644
    Hawthorne, W. [1186], Tanzania K000352645
    Fundi, T.H. [12], Tanzania K000352653


    First published in Kew Bull. 31: 180 (1976)

    Accepted by

    • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.


    Flora of Tropical East Africa

    • Bridson in Kew Bulletin 31: 180 (1976).


    Flora of Tropical East Africa
    Flora of Tropical East Africa

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    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at and
    © Copyright 2017 World Checklist of Selected Plant Families.

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at and
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.