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  1. Family: Acanthaceae Juss.
    1. Genus: Acanthus L.
      1. Acanthus kulalensis Vollesen

        This species is accepted, and its native range is N. Kenya.

    [FTEA]

    Acanthaceae (part 1), Kaj Vollesen, Flora of Tropical East Africa, 2008

    Habit
    Shrub to 2.5 m tall; young stems densely puberulous and with scattered longer hairs.
    Leaves
    Leaves with petiole to 7 mm long; lamina ovate to elliptic in outline, largest 10–17 × 4–7.5 cm, deeply lobed with large triangular spine-tipped lobes, each lobe with 1–2 spines on both sides, apex acuminate, spine-tipped, base cuneate to truncate, beneath puberulous or densely so on midrib and larger veins, glabrous to puberulous on lamina, above puberulous on midrib, otherwise glabrous or with a few scattered hairs; stipule-like interpetiolar leaves present, with lamina up to 5 mm long, spiny.
    Inflorescences
    Cymes terminal or also axillary from uppermost axils, 3–14 cm long; rachis densely sericeous-tomentose, with several pairs of sterile bracts at base; bracts leathery, with 3–5 prominent longitudinal veins, straw-coloured, obovate, densely sericeous in basal part, sparsely so upwards, 2.3–3 cm long in middle of cyme, spine-tipped and with 12–25 large and small teeth per side, longest ± 7 mm, small teeth inserted on larger near their base, teeth densely hairy throughout with longest hairs 1–2 mm long; bracteoles linear-lanceolate, 2.3–3.1 cm long, with 5–7 teeth per side, longest ± 7 mm long.
    Calyx
    Calyx green with purple tips, thickened part yellow, sericeous or densely so with hairs to 3 mm long, conspicuously ciliate; dorsal and ventral sepals ovate or ovate-elliptic, dorsal 1–3-veined, 2.7–3.2 cm long, obtuse to acute and spine-tipped or with acuminate 2-toothed tip and with 1–8 lateral teeth per side, longest tooth ± 4 mm long, ventral sepal 2-veined, 2.3–2.7 cm long, with 2 triangular spine-tipped lobes ± 5 mm long and with 1–6 lateral teeth per side, longest tooth ± 3 mm long, lateral sepals 1-veined, ovate, 2–2.2 cm long, acuminate, without or with 1–2 small teeth per side.
    Corolla
    Corolla tube white, limb pinkish-mauve; tube 2–3 mm long below thickened rim which is 4–7 mm long and extended dorsally into a 2–7 mm long tooth; limb 3.5–5 × 3–3.8 cm, below puberulous, above sparsely puberulous; callus with broad central groove and two narrow lateral ridges.
    Filaments
    Filaments 1.8–2 cm long, 2 dorsal hairy on inside near base; anthers 4–4.5 mm long, glabrous or with long curly hairs on sides.
    Fruits
    Capsule and seed not seen.
    Distribution
    Range: Not known elsewhere Range: Kenya. Flora districts: K1 Range: Not known elsewhere
    Ecology
    Grassy glades in dry montane forest and on forest margins; 1950–2100 m
    Note
    Differs from A. polystachius in the long silky indumentum on bracts and calyx, the longer bract teeth, the longer sepals and in the long dorsal tooth on the thickened corolla rim. It also occurs a long way outside the distribution area of A. polystachius.

    Images

    Distribution

    Other Data

    Acanthus kulalensis Vollesen appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 2012 Luke, W.R.Q. [10818], Kenya K000913679 holotype
    Jan 1, 2012 Luke, W.R.Q. [10818], Kenya K000913680 isotype
    Luke, W. R. Q. [11655], Kenya K000469028

    Bibliography

    First published in Kew Bull. 62: 239 (2007)

    Accepted by

    • Vollesen, K. (2008). Flora of Tropical East Africa, Acanthaceae(1): 1-285.

    Literature

    Flora of Tropical East Africa

    • K.B. 62: 239 (2007).

    Sources

    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