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  1. Family: Asteraceae Bercht. & J.Presl
    1. Genus: Lactuca L.
      1. Lactuca praecox R.E.Fr.

        This species is accepted, and its native range is Tanzania to Zambia.

    [FZ]

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

    Habit
    An erect subscapose perennial herb 7–55 cm. tall, from a narrowly turbinate rootstock.
    Stem
    Flowering stalks 1 -several ± diffusely branched, or much contracted and subpulviniform, glabrous or ± sparsely glandular-setose, bracteate; bracts foliaceous, sessile, up to c. 4 x 0.6 cm., very narrowly triangular, glabrous; branches mostly simple, up to c. 30 cm. long, divaricate-ascending, or much reduced, glabrous.
    Leaves
    Leaves poorly known, appearing after flowering, radical, dark-brown lanate in the axils, up to c. 10 cm. long, linear-oblong and sessile, or elliptic to narrowly ovate and broadly cuneate to attenuate at the base, margins ciliate-denticulate with teeth up to c. 1.5 mm. long; petiole-like midribs up to 4 cm. long, persisting as polished golden-brown scales.
    Capitulum
    Capitula precocious, numerous, sessile or stalked, solitary or in clusters of 2–4; stalks up to c. 5 cm. long, glabrous.
    Involucre
    Involucre 7–10 x 2.5 mm. at time of flowering, increasing to c. 17 x 3.5 mm. in fruiting capitula, cylindric to narrowly conical, later narrowly campanulate.
    Phyllaries
    Phyllaries glabrous, guttulate, green sometimes purple-tinged, ciliolate above, the outer from c. 3 mm. long and narrowly ovate, the inner to c. 16 mm. long and lanceolate.
    Florets
    Florets c. 5 per capitulum; corollas yellow, 12–16 mm. long, tube narrowly cylindric, ± densely pilose near the throat; ligules 10–14 x 3–4.5 mm., oblanceolate, ± pilose below, lobes papillose above.
    Fruits
    Achenes dark-brown to black, 8–9 mm. including a 2.5–3.5 mm. long paler beak, 1.5–1.75 mm. wide, narrowly ellipsoid, swollen-ribbed on the margins with 1 or sometimes 2–3 smaller ribs between, minutely antrorsely hispidulous; pappus several-seriate, copious, of fine white barbellate setae, c. 5 mm. long.
    [FTEA]

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

    Habit
    Perennial herb, subscapose; root with creamy latex, root-crown with old leaf-bases, sometimes long-woolly; flowering stem(s) 1–several, erect, brown or purplish, 6–55 cm high, laxly branched or strongly contracted, glabrous or sparsely setose; proximal bracts sessile, narrowly triangular, to 4 cm long and 6 mm wide.
    Leaves
    Leaves appearing after flowering, poorly known, in a rosette, lanceolate or ovate, 3–9 cm long, 1–4 cm wide, base cuneate, margins dentate and ciliate, apex acute, the purple midrib sparsely glandular-setose beneath.
    Capitulum
    Capitula precocious, many, in lax or contracted panicles 6–30 cm long; involucre cylindric or narrowly conical, 7–15 mm long; phyllaries brown or reddish green, ovate to lanceolate, 3–16 mm long, obtuse, glabrous except for a little hair-tuft at the very apex.
    Florets
    Florets 5–9 per capitulum; corolla yellow, tube cylindric, 2–3.5 mm long, pilose near the throat, ligules 10–14 mm long, 2.5–4.5 mm wide, distally papillose.
    Fruits
    Achenes red-brown to dark brown, flattened ellipsoid, 6.5–9 mm long including a 1.5–3.5 mm long paler beak, 3-ribbed on each side, minutely puberulous; pappus white, 4–9 mm long.
    Figures
    Fig. 20/6 (achene).
    Habitat
    Montane grassland and Brachystegia woodland, flowering after fires; 1500–2250 m
    Distribution
    T4 T7 T8

    Distribution

    Native to:

    Malawi, Tanzania, Zambia, Zaïre

    Other Data

    Lactuca praecox R.E.Fr. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Mwangoka, M.A. [4099], Tanzania K000614923

    Bibliography

    First published in Wiss. Erg. Schwed. Rhodesia-Kongo-Exp. 1911-1912 1: 352 (1916)

    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: 202, t. 36j (1992).
    • Lawalrée, Dethier & Gilissen in Flore d'Afrique Centrale Compositae: Cichorioideae: 49 (1986).
    • Dethier in Bulletin du Jardin Botanique National de Belgique 52: 376 (1982).
    • C. Jeffrey in Kew Bulletin 18: 449 (1966).
    • R.E. Fr. in Wiss. Ergebn. Schwed. Rhod.–Kongo Exped. 1: 352 (1916).

    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.

    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