1. Family: Asteraceae Bercht. & J.Presl
    1. Genus: Lactuca L.
      1. Lactuca paradoxa Sch.Bip. ex A.Rich.

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

    [FTEA]

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

    Habit
    Scandent herb 1.8–2.1 m high; stems flexuous, divaricately branching, the older ones sometimes with papery bark, glabrous or very sparsely pilose; latex white, copious.
    Leaves
    Leaves pinnatifid to pinnate, 4–10 cm long, 2–5.5 cm wide; petiole to 4 cm long, narrowly winged, blade with 1–2 pairs of lateral lobes, these cuneate or these and the terminal lobe ovate with a cordate base, dentate margins and acuminate apex, the very base of the whole leaf auriculate-semi-amplexicaul, the lateral lobes stalked briefly, glabrous or sparsely setose on the veins; leaves near and in inflorescence entire, unlobed, and small.
    Capitulum
    Capitula many in divaricately branched terminal panicles to 40 cm long; involucre 8–12 mm long; phyllaries reddish or deep purple, ovate to elliptic, 2–13 mm long, obtuse, glabrous except for the very apex which has a small tuft of hairs.
    Florets
    Florets 4–5; corolla pale yellow, tube cylindric, 6–7 mm long, pilose distally, ligules 4.5–5 mm long.
    Fruits
    Achenes pale brown, ellipsoid, hardly flattened, 5–5.5 mm long including the 0.5–1 mm long beak, seemingly glabrous but microscopically puberulous; pappus white, 6–8.5 mm long.
    Figures
    Fig. 20/10 (achene).
    Habitat
    Thickets, forest margins or riverine vegetation; 1950–2650 m
    Distribution
    K4 K6 T2 U3
    [FZ]

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

    Habit
    A scandent diffuse short-lived perennial herb up to 2 m. high.
    Stem
    Stems up to c. 5 m. long, slender terete, ± leafless and stramineous below, leafy and much entangled above, glabrous or rarely sparsely setulose.
    Leaves
    Leaves imparipinnately compound, up to c. 14.5 x 8 cm., narrowly ovate in outline, with 3–5 pinnae on a narrowly-winged midrib, the midrib narrowly-winged petiole-like and auriculate below, denticulate or entire, glabrous or sparsely setose beneath; the terminal pinna ± sessile on the winged midrib, 2–5.5 x 1.3–3 cm., narrowly ovate, acute-acuminate above, cordate below; lateral pinnae subopposite, petiolules 1–10 mm. long and not or hardly winged, 2–4.5 x 0.8–2.6 cm., oblong-ovate, ± acute mucronate above and cuneate to cordate or asymmetric at the base.
    Synflorescence
    Synflorescences paniculate, axillary and terminal, mostly amongst the foliage; branches diffusely dichotomously subdivided, bracteate; bracts leaf-like ± oblanceolate denticulate auriculate.
    Capitulum
    Capitula numerous; stalks up to c. 2.5(4.5) cm. long with 1-several c. 2 mm. long ovate-lanceolate bracteoles.
    Involucre
    Involucres c. 9 x 2 mm. and cylindric at time of flowering, increasing to c. 12 x 2.5 mm. and becoming conical in fruiting capitula; phyllaries c. 2–5 mm. long and broadly ovate on the outside, c. 12 mm. long and narrowly lanceolate on the inside, obtuse and ciliate above, glabrous.
    Florets
    Florets c. 5 per capitulum; corollas up to c. 14 mm. long, tube slender cylindric and pilose above, ligule yellow 6–8 x 1.5–2 mm., lorate.
    Fruits
    Achenes pale-brown, up to c. 6 x 1.5 mm. including a c. 1.5 mm. long beak, narrowly ellipsoid, somewhat compressed with swollen ribs on the margins and 4–5 narrower wing-like ribs on each face, hispidulous; pappus several-seriate, of white barbellate setae c. 7 mm. long.

    Images

    Distribution

    Native to:

    Ethiopia, Kenya, Malawi, Tanzania, Uganda, Zaïre

    Lactuca paradoxa Sch.Bip. ex A.Rich. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Ash [1525], Ethiopia 35780.000
    Ash [685], Ethiopia 37990.000
    Schimper [1320], Ethiopia K000251875
    Schimper [1320], Ethiopia K000251876
    Schimper [1320], Ethiopia K000251877

    First published in Tent. Fl. Abyss. 1: 460 (1848)

    Accepted by

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

    Literature

    Flora of Tropical East Africa
    • Agnew, A.D.Q. & Agnew, S., Upland Kenya Wild Flowers, ed. 2: 230 (1994).
    • G.V. Pope in Flora Zambesiaca 6: 208, t. 37g (1992).
    • Lawalrée, Dethier & Gilissen in Flore d'Afrique Centrale Compositae: Cichorioideae: 43, t. 7 (1986).
    • Dethier in Bulletin du Jardin Botanique National de Belgique 52: 370 (1982).
    • C. Jeffrey in Kew Bulletin 18: 456 (1966).
    • Stebbins in Bulletin du Jardin Botanique de l'État a Bruxelles 14: 344 (1937).
    • Oliv. & Hiern in Flora of Tropical Africa 3: 454 (1877).
    • A. Rich., Tent. Fl. Abyss. 1: 461 (1848).

    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