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  1. Family: Asteraceae Bercht. & J.Presl
    1. Genus: Lactuca L.
      1. Lactuca schulzeana Büttner

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


    Compositae, G. V. Pope. Flora Zambesiaca 6:1. 1992

    An erect long-lived giant annual herb, up to 3(3.5) m. tall.
    Taproot with several thick ± fleshy lateral roots.
    Stem solitary simple up to c. 1.5 cm. in diam., striately ribbed hollow glaucous, sparsely setose below, glabrous above.
    Leaves cauline somewhat crowded below; the lowermost up to c. 32 x 12 cm., elliptic-lanceolate in outline, grossly lyrate-runcinate, apices acute to obtuse, bases cuneate-attenuate with midrib ± narrowly winged petiole-like and semi-amplexicaul, denticulate on the margins, glabrous or sparsely setose particularly on the midrib and main nerves beneath; the upper leaves decreasing in size towards the stem apex, becoming lanceolate, undivided and sessile, ± sparsely setose.
    Synflorescence elongate-paniculate; branches short, patent and much thinner than the stem axis, sparsely glandular setulose, bracteate; bracts foliaceous.
    Capitula numerous stalked; involucres 6–8 mm. long at time of flowering, increasing to c. 12 mm. in fruiting capitula, cylindric to very narrowly campanulate.
    Phyllaries 4–5-seriate, purplish, glabrous, ciliolate above; the outermost c. 1.5 mm. long, ovate; the innermost up to c. 12 mm. long, lorate-lanceolate, obtuse to acute.
    Florets c. 10 per capitulum.
    Corollas 10–12.5 mm. long, blue to purplish; tube c. 5 mm. long, narrowly cylindric, sparsely setulose about the outside of the throat; ligule c. 6.5 mm. long, oblanceolate-lorate, lobes c. 1 mm. long, apically papillose.
    Achenes dark-brown, c. 4.5 mm. long including a distinct 1 mm. long beak, c. 1.25 mm. wide, fusiform, 3–4-angled, 1-several-ribbed between the angles, minutely hispidulous; beak slender, discolorous; pappus several-seriate of white barbellate setae c. 5 mm. long.

    Compositae, C. D. Adams. Flora of West Tropical Africa 2. 1963

    An erect herb up to about 6 ft. high
    Yellow or white florets in rather small heads in a wide diffuse panicle.

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

    Does not occur in our area, contrary to distribution data in F.W.T.A



    Native to:

    Angola, Cameroon, Congo, Zambia, Zaïre


    Other Data

    Lactuca schulzeana Büttner appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Gossweiler, J. [668], Angola K001307261
    Maitland, T.D. [1479], Cameroon K000027612
    Maitland, T.D. [1749], Cameroon K000027610
    Maitland, T.D. [1749], Cameroon K000027611
    Welweitsch [3658] K000251891 Unknown type material


    First published in Verh. Bot. Vereins Prov. Brandenburg 31: 72 (1889)

    Accepted by

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


    Flora of West Tropical Africa

    • in Verh. Bot. Verein Brandenburg 31: 72 (1889).


    Flora Zambesiaca
    Flora Zambesiaca

    Flora of Tropical East Africa
    Flora of Tropical East Africa

    Flora of West Tropical Africa
    Flora of West Tropical Africa

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    Digital Image © Board of Trustees, RBG Kew

    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.