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.

    [FTEA]

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

    Habit
    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
    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.
    Capitulum
    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.
    Flowers
    Corolla yellow, tube cylindric, 2.5–3.5 mm long, ligule 7–12 mm long, 2.5–4 mm wide.
    Fruits
    Achenes fusiform, 4.2–5.8 mm long, 3-ribbed on each side, sparsely puberulous, not or hardly beaked; pappus 4–7 mm long.
    Figures
    Fig. 20/2 (achene).
    Habitat
    Grassland or bare soil on rock outcrops; may be locally common;1800–2400 m
    Distribution
    T7 T8
    [FZ]

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

    Habit
    A subscapose perennial herb up to c. 75 cm. tall, from a large semi-woody taproot.
    Stem
    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
    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
    Synflorescence up to c. 25 cm. long, narrowly cylindric-pyramidal, bracteate; bracts up to c. 2 mm. long, ovate.
    Capitulum
    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
    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
    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.
    Fruits
    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.

    Images

    Distribution

    Native to:

    Malawi, Tanzania, Zambia

    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.

    Literature

    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).

    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