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  1. Family: Asteraceae Bercht. & J.Presl
    1. Genus: Lactuca L.
      1. Lactuca lasiorhiza (O.Hoffm.) C.Jeffrey

        This species is accepted, and its native range is Tropical Africa.


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

    Perennial herb; root woody, to 3 cm in diameter, with densely long-hairy root-crown.
    Leaves usually absent at flowering stage, developing afterwards, in a rosette, lanceolate to broadly obovate, 2–9 cm long, 2–6.5 cm wide (lobed and to 29x8 cm in quercifolia form), base attenuate, margins with distant dark teeth, apex obtuse and mucronate, sparsely pilose, denser on the veins, the midrib densely hairy beneath.
    Capitula (1–)4–24 in compact, dense, subsessile corymbs; inflorescence axes to 2 cm long, glabrous, with narrowly triangular bracts to 5 mm long; capitula with 10–14 florets; involucre 11–18 mm long; phyllaries grey-green marked with red, ovate or lanceolate, 4–15 mm long, acute or rounded, distally pilose and ciliate or sometimes glabrous with only the very apex densely hairy.
    Corolla bright yellow, tube cylindric, 8.5–9.5 mm long, ligule 8–10 mm long, ± 1.5 mm wide.
    Achenes 6.5–9 mm long including beak, ribbed, with a beak of 1–3 mm long; pappus white, 8–10 mm long.
    Fig. 20/1 (achene).
    Bare stony ground, burned grassland; 1800–2900 m
    T4 T7

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

    An acaulescent perennial herb rarely more than 7 cm. tall; taproot large, semi-woody, up to c. 3 cm. in diam. at the apex; rootcrown very densely brown sericeous-lanate with hairs c. 2 cm. long.
    Leaves radical, appearing after flowering, c. 9(25) cm. long, mostly oblanceolate in outline, acute at the apex, attenuate to cuneate below, remotely denticulate to runcinate-pinnatifid, ± densely pilose to glabrescent, midribs lanate below.
    Capitula erect, few to numerous, densely aggregated in a pulviniform synflorescence up to 10 cm. in diam.; flowering stalks congested, usually shorter than the capitula but occasionally up to c. 3.5 cm. long, partly or completely enveloped in the rootcrown hairs, simple or shortly branched, bracteate, glabrous to pilose, lanate in the axils; bracts 4–12 mm. long, lanceolate.
    Involucre 11–18 x 4–8 mm., cylindric to narrowly campanulate.
    Phyllaries 3–4-seriate, from c. 4 mm. long outside to c. 15 mm. long inside, lanceolate acute to acuminate, margins hyaline entire or remotely serrulate.
    Corollas c. 16 mm. long; tubes narrowly-cylindric, rugulose, puberulous above; ligules yellow, sometimes becoming reddish-purple outside, c. 10 mm. long, lorate, erect, glabrous, apical lobes densely papillose outside.
    Achenes dark-brown c. 9 mm. long including the beak, fusiform, apically attenuate into a beak c. 3 mm. long, narrowly-ribbed, scabridulous, glabrous; pappus copious several-seriate, of numerous barbellate setae up to 10 mm. long.

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

    A perennial herb
    A thick taproot yielding white latex
    The leaves appear separately from the tufted inflorescences which are about 2 in. high
    Yellow florets in purplish involucres; ligules reddish outside.


    Native to:

    Cameroon, Central African Repu, Ghana, Malawi, Nigeria, Tanzania, Togo, Zambia, Zaïre, Zimbabwe


    Other Data

    Lactuca lasiorhiza (O.Hoffm.) C.Jeffrey appears in other Kew resources:


    First published in Kew Bull. 18(3): 438 (1966)

    Accepted by

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


    Flora of Tropical East Africa

    • G.V. Pope in Flora Zambesiaca 6: 197 (1992).
    • Lawalrée, Dethier & Gilissen in Flore d'Afrique Centrale Compositae: Cichorioideae: 48 (1986).
    • C. Jeffrey in Kew Bulletin 18: 438 (1966).


    Flora Zambesiaca
    Flora Zambesiaca

    Flora of Tropical East Africa
    Flora of Tropical East Africa

    Flora of West Tropical Africa
    Flora of West Tropical Africa

    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.