1. Family: Asteraceae Bercht. & J.Presl
    1. Genus: Lactuca L.
      1. Lactuca attenuata Stebbins

        This species is accepted, and its native range is Uganda to Malawi.

    [FZ]

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

    Habit
    A vigorous scandent short-lived perennial herb up to c. 2 m. high.
    Stem
    Stems terete, ± densely leafy, setose, or glabrescent above.
    Leaves
    Leaves up to c. 15 x 3 cm., ± narrowly lanceolate in outline, ± runcinate, 3–7-lobed, narrowly-winged petiole-like and dentate-auriculate at the base, subentire to denticulate often ciliate on the margins, setose particularly on the midrib and reticulation beneath; terminal lobe up to 6 cm. long, narrowly triangular-sagittate, attenuate above; lateral lobes up to 2 x 1 cm., recurved acute-mucronate.
    Synflorescence
    Synflorescences paniculate, axillary or terminal, usually borne clear of the foliage; branches glabrous and with leaf-like bracts.
    Capitulum
    Capitula numerous; stalks up to c. 3 cm. long with 1-several c. 2 mm. long lanceolate bracteoles.
    Involucre
    Involucres c. 10 x 2 mm. and cylindric at time of flowering, increasing to c. 15 x 2.5 mm. and becoming narrowly conical in fruiting capitula; phyllaries narrowly lanceolate, the outer less than half the length of the innermost, obtuse and ciliolate above, glabrous or sometimes with 1–5 conspicuous setae along the midrib, green often purple-tinged where exposed.
    Florets
    Florets c. 5 per capitulum; corollas 13–14 mm. long, tube slender pubescent about the mouth, ligule yellow often with a purple central band outside, 7–8 x 3–3.5 mm., lorate, spreading.
    Fruits
    Achenes pale-brown, up to c. 6 x 1.5 mm. including a 1 mm. long beak, narrowly ellipsoid, somewhat compressed with swollen ribs on the margins and 4–5 corky wing-like ribs on each face, hispidulous or glabrous; pappus several-seriate, of equal white barbellate setae up to c. 7.5 mm. long.
    [FTEA]

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

    Habit
    Scandent herb 0.3–3 m high; climbing stems setose or glabrous, main stems 5–12 mm in diameter and corky.
    Leaves
    Leaves with winged petiole, blade narrowly ovate or elliptic, 6–17 cm long, 0.8–2.5 cm wide, with 1–3 pairs of retrorse triangular lobes, margins with retrorse teeth, apex acuminate, glabrous or beneath setose on midrib, veins and margins; distal leaves simple and smaller.
    Capitulum
    Capitula many, in lax leafy panicles to 45 cm long; involucre 8–15 mm long; phyllaries purplish to almost black, ovate (outer) to linear (inner), 2.5–14 mm long, acute to obtuse, with apical hair tufts.
    Florets
    Florets 3–5 per capitulum; corolla yellow (rarely mauve), tube ± 5 mm long, distally pilose, ligules ± 7 mm long.
    Fruits
    Achenes ellipsoid, somewhat flattened, 4.5–6.5 mm long including a beak of 1 mm; pappus white, 6.5–7.5 mm long.
    Figures
    Fig. 20/9 (achene).
    Habitat
    Montane forest margins in moist sites, Hypericum bush, secondary scrub; 1800–3000 m
    Distribution
    U2

    Images

    Distribution

    Native to:

    Burundi, Malawi, Rwanda, Uganda, Zaïre

    Lactuca attenuata Stebbins appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    De Witte [1816] K000251866 isotype

    First published in Bull. Jard. Bot. État Bruxelles 14: 346 (1937)

    Accepted by

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

    Literature

    Flora of Tropical East Africa
    • G.V. Pope in Flora Zambesiaca 6: 207, t. 37f (1992).
    • Lawalrée, Dethier & Gilissen in Flore d'Afrique Centrale Compositae: Cichorioideae: 46, t. 8 (1986).
    • Dethier in Bulletin du Jardin Botanique National de Belgique 52: 372 (1982).
    • C. Jeffrey in Kew Bulletin 18: 455 (1966).
    • Stebbins in Bulletin du Jardin Botanique de l'État a Bruxelles 14: 346 (1937).

    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

    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