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  1. Family: Asteraceae Bercht. & J.Presl
    1. Genus: Senecio L.
      1. Senecio jacksonii S.Moore

        This species is accepted, and its native range is Uganda to Kenya (Mt. Elgon).


    Compositae, H. Beentje, C. Jeffrey & D.J.N. Hind. Flora of Tropical East Africa. 2005

    Creeping perennial herb, subscapigerous, rhizomatous, tufted with erect flowering stems 4–15 cm high; stems green or purplish, arachnoid, glabrescent.
    Leaves ± crowded, sessile, dark green, narrowly oblanceolate, oblanceolate-spatulate or oblanceolate, 2–7 cm long, 0.1–0.6 cm wide, tapered into a slightly expanded membraneous base, margins entire or remotely denticulate and revolute, apex obtuse, subapiculate, arachnoid especially on midrib or sparsely arachnoid or pilose especially towards or only at the base and on margins, glabrescent, slightly purplish.
    Capitula radiate, erect, terminal, solitary or 2–3; stalks of the individual capitula arachnoid to glabrous; involucre obconic-cylindrical, 7.5–9 mm long, 4.5–6 mm in diameter; bracts of calyculus 6–20, imbricate, lanceolate or broadly so, dark or purplish at the apex, 1–4.5 mm long, thinly arachnoid or ciliate or glabrous; phyllaries 16–22, green or purple-tinged with dark purplish tips, 7–8.5 mm long, thinly arachnoid to glabrous.
    Ray florets 15–20, yellow, tube 3–3.8 mm long, hairy, rays 9–12 x 2.5–3 mm, 4–5-veined; disc florets yellow, corolla 4.7–5.8 mm long, slightly expanded above the middle, glabrous, lobes 0.7–0.8 mm long.
    Achenes 2.5–2.8 mm long, ribbed, hairy or sparsely so in the grooves; pappus 4–5 mm long, white.
    On thin soil over rocks and rocky ground, swampy grassland; 3250–4150(–4500) m
    endemic to Elgon and Nyandarua/Aberdares K3/K4 U3



    Native to:

    Kenya, Uganda


    Other Data

    Senecio jacksonii S.Moore appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 1953 Liebenberg, L.C.C. [1583], Uganda K000311965
    Jan 1, 1953 Tothill, J.D. [T2416], Uganda K000311963
    Jan 1, 1953 Tweedie, R. [8], Kenya K000311966
    Adamson, J. [JA466], Kenya K000312211
    Dale, I.R. [], Kenya K000311970
    Thomas, A.S. [Th597], Uganda K000312203
    Thomas, A.S. [Th2702], Uganda K000312206
    Townsend, C.C. [2404], Kenya K000311971
    Galpin, E.E. [7915], Kenya K000311969
    Mabberley, D.J. [449], Kenya K000312209
    Hedberg, O. [4485], Uganda K000311962
    Hedberg, O. [4294], Kenya K000311968
    Hedberg, O. [1545], Kenya K000311972
    Hedberg, O. [4541], Uganda K000312205
    Mwangangi, O.M. [315], Kenya K000311967
    Lugard, C. [360], Kenya K000312210
    Battiscombe, E. [670], Kenya K000312212
    Lye, K.A. [23089], Uganda K000311961
    Wesche, K. [30], Uganda K000311964
    Wesche, K. [1818], Kenya K000312208
    Saundy, W. [30], Uganda K000312207
    Tothill, J.P. [T2461], Uganda K000312204
    Dummer, R.A. [3308], Uganda Senecio caryophyllus K000311369


    First published in J. Linn. Soc., Bot. 35: 358 (1902)

    Accepted by

    • Roskov Y. & al. (eds.) (2018). Species 2000 & ITIS Catalogue of Life Naturalis, Leiden, the Netherlands.


    Flora of Tropical East Africa

    • Agnew, A.D.Q. & Agnew, S., Upland Kenya Wild Flowers, ed. 2: 223 (1994).
    • C. Jeffrey in Kew Bulletin 41: 900 (1986).
    • O. Hedberg, Afroalpine Vascular Plants p. 240, 361 (1957).
    • S.Moore in Journal of the Linnean Society of London, Botany 35: 358 (1902).


    Flora of Tropical East Africa
    Flora of Tropical East Africa

    Herbarium Catalogue Specimens
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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.