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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.

    [FTEA]

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

    Habit
    Perennial herb; root woody, to 3 cm in diameter, with densely long-hairy root-crown.
    Leaves
    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.
    Capitulum
    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.
    Flowers
    Corolla bright yellow, tube cylindric, 8.5–9.5 mm long, ligule 8–10 mm long, ± 1.5 mm wide.
    Fruits
    Achenes 6.5–9 mm long including beak, ribbed, with a beak of 1–3 mm long; pappus white, 8–10 mm long.
    Figures
    Fig. 20/1 (achene).
    Habitat
    Bare stony ground, burned grassland; 1800–2900 m
    Distribution
    T4 T7
    [FZ]

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

    Habit
    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
    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.
    Capitulum
    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
    Involucre 11–18 x 4–8 mm., cylindric to narrowly campanulate.
    Phyllaries
    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.
    Corolla
    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.
    Fruits
    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.
    [FWTA]

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

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

    Distribution

    Native to:

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

    Synonyms

    Other Data

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

    Bibliography

    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.

    Literature

    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).

    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

    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