Skip to main content
  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.

    [FZ]

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

    Habit
    An erect long-lived giant annual herb, up to 3(3.5) m. tall.
    Roots
    Taproot with several thick ± fleshy lateral roots.
    Stem
    Stem solitary simple up to c. 1.5 cm. in diam., striately ribbed hollow glaucous, sparsely setose below, glabrous above.
    Leaves
    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
    Synflorescence elongate-paniculate; branches short, patent and much thinner than the stem axis, sparsely glandular setulose, bracteate; bracts foliaceous.
    Capitulum
    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
    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
    Florets c. 10 per capitulum.
    Corolla
    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.
    Fruits
    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.
    [FWTA]

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

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

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

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

    Images

    Distribution

    Native to:

    Angola, Cameroon, Congo, Zambia, Zaïre

    Synonyms

    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

    Bibliography

    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.

    Literature

    Flora of West Tropical Africa

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

    Sources

    Flora Zambesiaca
    Flora Zambesiaca
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Flora of Tropical East Africa
    Flora of Tropical East Africa
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Flora of West Tropical Africa
    Flora of West Tropical Africa
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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