Skip to main content
  1. Family: Acanthaceae Juss.
    1. Genus: Acanthopale C.B.Clarke
      1. Acanthopale aethiogermanica Ensermu

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

    [KBu]

    Kelbessa, E. 2009. Three new species of Acanthaceae from Ethiopia. Kew Bulletin 64: 57. DOI: https://doi.org/10.1007/s12225-009-9097-3

    Type
    Ethiopia, Kefa Region, JimmaAwraja, end of Belete Forest, 7°35′N, 36°40′E, 18 Aug. 1982, Puff & Ensermu K. 820818-7/4 (holotypus ETH; isotypi K, WU).
    Habit
    Shrub to 4 m high
    Stem
    Stems much branched, pubescent with descending non-glandular hairs; internodes up to 6 – 14 cm long
    Leaves
    Leaves anisophyllous; lamina 12 – 45 × 6 – 15 cm, broadly elliptic, broadest about the middle, margins entire to vaguely crenate, apex long-acuminate, base attenuate to decurrent, densely studded with cystoliths, pubescent or nearly glabrous; lateral veins 8 – 12 pairs; petiole 3 – 8 cm long, pubescent with descending hairs
    Spikelets
    Spikes axillary, with (1 –) 2 – 3 (– 4) flowers per node and the spike somewhat 1-sided
    Bracts
    Bracts 2, linear to linear-oblanceolate, 8 – 15 × 1 – 3 mm, sparsely pubescent (denser along midrib), ciliate along the margins in flower, covered with reddish glandular hairs in fruit, longer than bracteoles and calyx lobes Bracteoles 2, oblong-oblanceolate to linear-oblong, 7 – 12 × 2 – 3 mm, apex rounded, nearly glabrous except for the ciliate margins in flower, covered with reddish glandular hairs in fruit, about as long as calyx lobes
    Calyx
    Calyx with 5 unequal lobes, one lobe distinctly larger than others, 10 – 11 × 4 – 4.5 mm, oblique-elliptic with acute apex, the other lobes sub-equal, 7 – 10 × 2 – 3 mm, oblong or oblong-elliptic, apex rounded or truncate, nearly glabrous except for few hairs along the margin in flower, pubescent on their upper portion with reddish glandular and some non-glandular hairs in fruit
    Corolla
    Corolla white with purple streaks inside tube, 31 – 35 mm long; tube with lower cylindrical portion oblique, c- 4 mm long on one side and 6 – 7 mm long on the other side, c- 2.5 mm broad at the extreme base, glabrous outside, densely pilose inside; upper enlarged portion 22 – 23 mm long, 30 – 35 mm broad at the extreme apex, nearly glabrous; lobes equal, 6 – 8 × 12 – 14 mm, broader than long, apex rounded to retuse, pilose. Stamens 4, rarely 5 (see Chaffey 1143), similar in size; filaments 16 – 19 mm long, pilose in the lower half; anthers 5 – 6 mm long, glabrous, 2-thecous; thecae more or less parallel, without tail
    Ovary
    Ovary 3.7 – 4.5 mm long, partially enclosed within a 0.8 – 1.1 mm long disc, glabrous; style exserted beyond the corolla tube, 28 – 32 mm long, pubescent to near the apex, sparsely so at base; stigma 2-lobed, lower lobe 2 – 3 mm long, upper minute
    Fruits
    Capsule 14 – 16 × 5.6 – 6.5 mm, glabrous, 4-seeded
    Seeds
    Seeds 5.8 – 6.4 × 4.5 – 5 mm, ovoid, brown with grey hygroscopic hairs, which are denser along margins
    Distribution
    Acanthopaleaethio-germanica occurs in the Kefa, Arsi, Sidamo and Bale Regions in southern Ethiopia. Map 1.
    Ecology
    In moist forest clearings with Dracaena afromontana, Lobelia giberroa and Prunus africana, in wet tropical forest under heavy shade in valley, and in moist montane forest with Pouteriaadolfi-friederici, Olea welwitschii, Podocarpusfalcatus, Warburgiaugandensis, Filiciumdecipiens, Polysciasfulva, Syzygiumguineense subsp. afromontanum, Prunus africana, Croton macrostachyus, Ocotea kenyensis, Fagaropsisangolensis, Tecleanobilis, Veprisdainellii, Celtis spp., without or with much Coffea arabica in the understorey; on clay soil, or brown soil rich with humus; 1,600 – 2,300 (– 2,600 m).
    Conservation
    Acanthopaleaethio-germanica is a widespread taxon occurring in several forest patches in Ethiopia. It is distributed in both protected and unprotected and much disturbed forest patches. Although coffee is managed in some of the forest patches where the species have been collected, coffee management does not completely remove the other species that are associated with coffee; thus the survival of Acanthopaleaethio-germanica is considered not threatened. Therefore, the taxon is assessed as Least Concern (LC).
    Note
    Acanthopaleaethio-germanica is closely related to A. laxiflora (Lindau) C. B. Clarke, but it is differentiated from the latter by its calyx lobes which are unequal, one larger than the rest (vs all similar in A. laxiflora), by its stamens which are similar in length (vs didynamous), by its densely pubescent (vs glabrous filaments) and by its protruding style-stigma (vs included in A. laxiflora). The two species are also geographically isolated, the latter being restricted to Tanzania. Acanthopaleaethio-germanica also resembles A. pubescens (Lindau ex Engl.) C. B. Clarke, but the new species can easily be separated from the latter by its leaves which are broadly elliptic, broadest about the middle (vs ovate or ovate-elliptic and broadest near the base in A. pubescens), spikes axillary (vs borne on short axillary shoots), calyx lobes nearly glabrous except for the sparsely ciliate margins (vs pilose, at least along the margins with white hairs) and by its stamens which are similar in length and pubescent to near the apex (vs stamens didynamous and filaments glabrous in A. pubescens). The new species of Acanthopale has been named A. aethio-germanica in commemoration of the centenary of the diplomatic relations between Ethiopia and Germany.

    Images

    Distribution

    Native to:

    Ethiopia

    Other Data

    Acanthopale aethiogermanica Ensermu appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Puff, C. [820818-7/4], Ethiopia K000569566 isotype

    Bibliography

    First published in Kew Bull. 64: 58 (2009)

    Sources

    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 Bulletin
    Kew Bulletin
    http://creativecommons.org/licenses/by-nc-sa/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