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  1. Family: Asteraceae Bercht. & J.Presl
    1. Genus: Ageratinastrum Mattf.
      1. Ageratinastrum palustre Wild & G.V.Pope

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

    [FZ]

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

    Habit
    An erect stiff perennial herb to c. 1 m. tall, with annual stems from a woody rootstock.
    Stem
    Stems many, strict, branching above, densely leafy with internodes less than 2 cm. long, whitish pilose-pubescent, glabrescent below; indumentum of short-stalked flagelliform hairs.
    Leaves
    Leaves alternate or spirally arranged sometimes opposite or whorled, subsessile or with petioles to c. 2 mm. long; lamina 1–3.3 x 0.4–1.2 cm., narrowly oblong-lanceolate to narrowly ovate, acute mucronulate at the apex, cuneate to rounded below, margins ± revolute, upper surface glabrous or thinly sparsely pilose-puberulous with nerves ± impressed, the lower surface paler and sparsely pilose especially on the nerves, glandular-punctate.
    Capitulum
    Capitula numerous, singly or in 2–10-capitulate clusters at the ends of branches, or capitulum-clusters ± corymbiformly cymose at the stem apex.
    Involucre
    Involucres 3–4 x 3–4.5 mm., campanulate to subglobose; florets exserted.
    Phyllaries
    Phyllaries several-seriate, purple and acute above, tomentellous to woolly outside; the outer phyllaries from c. 1 mm. long, ovate; the inner to c. 4 mm. long, narrowly oblong-lanceolate.
    Receptacle
    Receptacle shallowly alveolate.
    Corolla
    Corollas mauve, darker in the upper half, 5–6 mm. long, narrowly funnel-shaped, puberulous or thinly pilose outside at least on the lobes, glandular, the lobes purple-tipped.
    Fruits
    Achenes 1–1.5 mm. long, turbinate, truncate at the apex, 4–5-sided with obscure narrow ribs on the angles, rugose or transversely ridged on the faces between the ribs, glabrous or sparsely setulose, minutely brown gland-dotted; pappus of broad ± united shiny, white brownish or sometimes purplish scales, 0.5–1 mm. long and ± lacerate on the upper margin, occasionally scales ± free and alternating with 1–3 narrow paleaceous setae which ± exceed the scales in length.

    Images

    Distribution

    Other Data

    Ageratinastrum palustre Wild & G.V.Pope appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 1976 Richards, H.M. [16151], Zambia K000273362 holotype

    Bibliography

    First published in Kirkia 10(2): 326 (1977)

    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

    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