1. Family: Asteraceae Bercht. & J.Presl
    1. Genus: Vernonia Schreb.
      1. Vernonia tuberifera R.E.Fr.

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

    [FZ]

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

    Habit
    An erect slender perennial herb, to c. 37 cm. tall from a small woody rootstock.
    Roots
    Rootstock producing 2–5 subsessile root-tubers; tubers up to 3 x 1.5 cm., subfusiform, tapering into long thong-like roots.
    Stem
    Stems annual, 1 -several, simple or sparsely branched above, leafy, ribbed, ± coarsely pubescent and glandular, more densely so towards the apex, pilose below; indumentum a mixture of ± appressed short-stalked hairs and long patent hairs, the hairs flagelliform with an often purplish stalk and an elongate terminal cell.
    Leaves
    Leaves subsessile, to 10 x 2 cm., narrowly oblanceolate, apex obtuse, base tapering-cuneate, margins subserrate with callose-tipped teeth but entire near the base, lamina scabridulous-pilose and glandular on both surfaces; the hairs scattered, patent, flagelliform, becoming rigid below; venation not raised reticulate.
    Capitulum
    Capitula solitary and terminal on stems, or 2–3 on short branches.
    Involucre
    Involucres 9–11 x 11–18 mm., broadly obconic or cup-shaped.
    Phyllaries
    Phyllaries several-seriate, apicies ± differentiated but not appendaged, purple-tipped and glandular at the apices; the outer phyllaries 6–8 x 1–2 mm., linear-lanceolate, puberulent; the middle phyllaries to c. 9 x 3 mm., oblong-lanceolate, ± acuminate at apex, glabrous or puberulent where exposed; the inner phyllaries to c. 10 mm. long, linear-acute.
    Florets
    Florets c. 20 per capitulum.
    Corolla
    Corollas purple or mauve, to c. 15 mm. long, slender tubular in lower two thirds abruptly widening into a cylindric limb exserted above the pappus.
    Fruits
    Achenes (immature) c. 2 mm. long, ribbed, strigose-hispid; pappus several-seriate, copious, somewhat caducous, setae increasing in length to c. 8 mm. long on inside, somewhat flattened and barbellate on the margins.

    Distribution

    Vernonia tuberifera R.E.Fr. appears in other Kew resources:

    First published in Wiss. Erg. Schwed. Rhodesia-Kongo-Exp. 1911-1912 i. 326 (1916)

    Accepted by

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

    Sources

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

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. 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 2019. 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