Genus:
Lactuca L.

Lactuca zambeziaca C.Jeffrey

This species is accepted, and its native range is DR Congo to Angola.

[FZ]

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

Morphology General Habit
An erect perennial herb, often viscid, up to c. 150(200) cm. tall; taproot semi-woody turbinate.
Morphology Stem
Stems solitary, branching above, glabrous, green and often purple-tinged.
Morphology Leaves
Leaves contemporaneous with flowers, ± membranous, glabrous, 18–32 x 0.25–1.5 cm., narrowly elliptic to linear-lanceolate, usually with 2–4 well developed lobes in the lower half, ± attenuate and acute at the apex, narrowly attenuate below and usually semi-amplexicaul at the base, subentire; terminal lobe 12–23 cm. long, elliptic-linear; lateral lobes 0.5–6 cm. long, very narrowly triangular.
Morphology Reproductive morphology Inflorescences Synflorescence
Synflorescences paniculate, up to c. 40 x 15 cm., cylindrical; branches divaricate slender glabrous.
Morphology Reproductive morphology Inflorescences Capitulum
Capitula numerous, stalked; stalks 1.5–12 mm. long; involucres 8–9 x 1.5–2 mm. at time of flowering, increasing to c. 12 x 2.5 mm. in fruiting capitula, cylindric.
Morphology Reproductive morphology Inflorescences Bracts Phyllaries
Phyllaries ciliolate above otherwise glabrous, guttulate, green and often purple-tinged where exposed; the outermost less than half the length of the inner, broadly ovate; the innermost 9–11 x 1–2 mm., linear-lanceolate, margins becoming involute except near the apices.
Morphology Reproductive morphology Flowers Florets
Florets c. 5 per capitulum; corollas yellow, up to c. 12 mm. long, tube narrowly cylindric, sparsely pilose near the throat; ligule c. 6 mm. long, erect.
Morphology Reproductive morphology Fruits
Achenes dark-brown to black, 5–6.5 x 1.5–2 mm. including a 1–1.5 mm. long paler-coloured beak, compressed-ellipsoid, broadly thickened at the margins, narrowly 1-ribbed on each face, hispidulous or glabrous; pappus several-seriate, of white barbellate setae c. 6 mm. long.

Native to:

Angola, Zambia, Zaïre

Lactuca zambeziaca C.Jeffrey appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Richards, H.M. [11108], Zambia K000251892 holotype Yes

First published in Kew Bull. 18: 450 (1966)

Accepted by

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

  • Flora Zambesiaca

    Flora Zambesiaca
    http://creativecommons.org/licenses/by-nc-sa/3.0

  • Herbarium Catalogue Specimens

    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 2022. 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 2022. 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