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  1. Family: Asteraceae Bercht. & J.Presl
    1. Genus: Lactuca L.
      1. Lactuca calophylla C.Jeffrey

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


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

    Perennial herb, scapose, with solitary or twin flowering stem(s) 20–75 cm high; roots somewhat woody; root-crown with old laciniate leaf bases, otherwise glabrous; stem sparsely to densely setose on the ribs, the setae purple.
    Leaves in a rosette, sessile, broadly elliptic, 5.5–22.5 cm long, 2–12 cm wide, base cuneate to attenuate, margins sinuate-dentate, apex obtuse or retuse with a mucro, pale green and glabrous above, with purple veins and sparsely setose beneath; cauline leaves absent or 1–2, similar to the rosette ones.
    Capitula many, in narrow panicles; involucre cylindrical, 8–12 mm long; phyllaries 3-seriate, green, ovate to lanceolate, 2–12 mm long, glabrous or the very apex minutely hairy.
    Corolla yellow, tube cylindric, 2.5–3.5 mm long, ligule 7–12 mm long, 2.5–4 mm wide.
    Achenes fusiform, 4.2–5.8 mm long, 3-ribbed on each side, sparsely puberulous, not or hardly beaked; pappus 4–7 mm long.
    Fig. 20/2 (achene).
    Grassland or bare soil on rock outcrops; may be locally common;1800–2400 m
    T7 T8

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

    A subscapose perennial herb up to c. 75 cm. tall, from a large semi-woody taproot.
    Flowering stalks erect, somewhat robust, usually solitary, mostly branching above, sparsely to densely glandular-setose; setae 1.5–4 mm. long, patent soft purple.
    Leaves 1–6 ± prostrate in a basal rosette, arising from a sheath of leaf bases persisting from the previous season, 5.5–17.5(22) x 2–12 cm., elliptic to rotund rarely oblate; apices obtuse, often mucronate in young leaves; bases rounded to cuneate with the midrib winged petiole-like; margins denticulate, often ciliate between the teeth; upper surface green glabrous or sparsely purple-setose particularly along and near the margins and midrib, lower surface purplish or green with a prominent purple reticulation, purple-setose on midrib and main nerves, occasionally also puberulent; cauline leaves absent, or if present reduced and bract-like.
    Synflorescence up to c. 25 cm. long, narrowly cylindric-pyramidal, bracteate; bracts up to c. 2 mm. long, ovate.
    Capitula numerous, stalked; involucres cylindric, 8–10 x 1.75–2 mm. at time of flowering, increasing to c. 12 x 3 mm. in fruiting capitula.
    Phyllaries 2–3-seriate, green, minutely tuberculate-rugose outside and puberulous above; the outermost ovate, usually less than half the length of the inner; the innermost up to c. 12 mm. long, lanceolate-lorate, obtuse.
    Florets 4–6 per capitulum; corollas yellow, 11.5–16 mm. long, tube cylindric, ligule 9–12 x 2.5–4 mm. lorate with lobes 1–2 mm. long and apically papillose.
    Achenes reddish-brown, 4.5–5.5 mm. long, ellipsoid, not or hardly beaked, broadly 2–3-ribbed with 2–3 smaller ribs between, minutely strigose; pappus several-seriate of barbellate setae 4–7 mm. long.



    Native to:

    Malawi, Tanzania, Zambia

    Other Data

    Lactuca calophylla C.Jeffrey appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Richards, H.M. [7614], Tanzania K000251883 holotype


    First published in Kew Bull. 18(3): 439 (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: 198 (1992).
    • Dethier in Bulletin du Jardin Botanique National de Belgique 52: 375 (1982).
    • C. Jeffrey in Kew Bulletin 18: 439, fig. 4 (1966).


    Flora Zambesiaca
    Flora Zambesiaca

    Flora of Tropical East Africa
    Flora of Tropical East Africa

    Herbarium Catalogue Specimens
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    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.