1. Family: Salicaceae Mirb.
    1. Genus: Populus L.
      1. Populus ilicifolia (Engl.) Rouleau

        This species is accepted, and its native range is Central & E. Kenya to E. Tanzania (Ruvu river).

    [FTEA]

    Salicaceae, C.M. Wilmot-Dear. Flora of Tropical East Africa. 1985

    Habit
    Deciduous tree (7–) 15–27 m. high, when young columnar, later rounded or with open conical crown; younger branches pendulous; bark at first smooth, whitish or light brown, later dark red-brown or grey-brown, rough, longitudinally fissured, often deeply; woody twigs red-brown, glabrous, rough with many shallow longitudinal furrows and scattered small inconspicuous oval pale lenticels 0.2–0.3 mm. long; very young stems yellow-brown, glabrous or with sparse or abundant short fine ± erect hairs.
    Leaves
    Leaves of very varying shape with intermediates between two different forms:on juvenile or sucker growth very narrow, linear, narrowly ovate or narrow-elliptical, entire or variously serrate or dentate or shallowly few-lobed, 4–7.5 cm. long, 3–10 mm. wide, apex rounded or acute, tip mucronate, base cuneate, ± sessile or with petiole up to 6 mm. long; on mature growth leaves broad, rarely elliptical and shallowly 2–5-toothed, more often ovate or obovate and angular, 2–5-lobed, 4–7 × 4.5–5 cm., apex long-acute to truncate and lobed, extreme tip mucronate, base cuneate or ± rounded; both forms chartaceous, glabrous or with sparse, rarely abundant, short fine pale hairs above and beneath; primary veins alternate or subopposite, 4–7(–8) pairs, running into margin or lobe-tips or becoming indistinct, reticulation usually visible in mature leaves, all venation inconspicuous in juvenile form; petiole 2.5–4.5 cm. long.
    Stipules
    Stipules free, thinly membraneous, reddish, strap-like or obovate, up to 5 mm. long, 1.5 mm. wide, soon deciduous.
    Inflorescences
    Male inflorescences 1.7–2 cm. long, axillary; axis with short fine pale hairs more dense near base; flowers 6–9, spirally arranged; pedicels ± 1 mm. long, sparsely pubescent as axis; bract red-brown, thinly membranous, strap-like, ± spathulate, apically forked or lobed, 3–4(–5) mm. long, 1–1.5 mm. wide; disc reddish, membranous, deeply laciniate almost to centre into many strap-like lobes, each ± 1 mm. long. Female inflorescences 1–4 cm. long, terminal on short axillary branches bearing 1 or more leaves, 5–15-flowered; axis rarely once-branched; pedicels 3–5(–8) mm. long, often lengthening in fruit; bract reddish, thinly membranous, spathulate, apically dentate, 5.5–6 mm. long, 1.5 mm. wide; disc red-brown, membranous, divided into 6–8 free thin strap-like lobes 0.7–2 mm. long.
    Male
    Male inflorescences 1.7–2 cm. long, axillary; axis with short fine pale hairs more dense near base; flowers 6–9, spirally arranged; pedicels ± 1 mm. long, sparsely pubescent as axis; bract red-brown, thinly membranous, strap-like, ± spathulate, apically forked or lobed, 3–4(–5) mm. long, 1–1.5 mm. wide; disc reddish, membranous, deeply laciniate almost to centre into many strap-like lobes, each ± 1 mm. long. Stamens many (± 30); filaments up to 1 mm. long; anthers oblong, 1 mm. long, 0.4 mm. wide.
    Stamens
    Stamens many (± 30); filaments up to 1 mm. long; anthers oblong, 1 mm. long, 0.4 mm. wide.
    Female
    Female inflorescences 1–4 cm. long, terminal on short axillary branches bearing 1 or more leaves, 5–15-flowered; axis rarely once-branched; pedicels 3–5(–8) mm. long, often lengthening in fruit; bract reddish, thinly membranous, spathulate, apically dentate, 5.5–6 mm. long, 1.5 mm. wide; disc red-brown, membranous, divided into 6–8 free thin strap-like lobes 0.7–2 mm. long. Ovary ovoid, 3.5–5 mm. long, 1.5–2 mm. wide; style very short, ± 1 mm. long; stigmas 4, each 6–7 mm. long, 2–3-lobed; axis, pedicel, ovary and outer surface of stigmas with abundant fairly long ± adpressed hairs.
    Pistil
    Ovary ovoid, 3.5–5 mm. long, 1.5–2 mm. wide; style very short, ± 1 mm. long; stigmas 4, each 6–7 mm. long, 2–3-lobed; axis, pedicel, ovary and outer surface of stigmas with abundant fairly long ± adpressed hairs.
    Fruits
    Mature capsule ovoid, 7–15 mm. long, 4–8 mm. wide, with pedicel up to 7 mm., glabrous, rough with pale lenticels, longitudinally 4-furrowed, splitting along furrows into 2–4 valves.
    Seeds
    Seed ovoid, (0.5–)1–2 mm. long, (0.2–)0.5–0.8 mm. wide, with large tuft of long fine white hairs ± 6 times seed-length.
    Figures
    Fig. 2.
    Habitat
    Riverine forest, mudflats, sandbanks; often dominant or locally common; near sea-level to 1000 m.
    Distribution
    K1 K4 K7 not known elsewhere (see note below)

    Images

    Distribution

    Native to:

    Kenya, Tanzania

    Populus ilicifolia (Engl.) Rouleau appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Dec 15, 1987 Medley, K. [220], Kenya K000211172
    Oct 1, 1983 Hildebrandt, J.M. [2608], Kenya K000243566 isotype
    Greenway, P.J. [12902], Kenya K000211170
    Greenway, P.J. [12760], Kenya K000211169
    Gillett, J.B. [16991], Kenya K000211162
    Gillett, J.B. [19216], Kenya K000211166
    Gillett, J.B. [19912], Kenya K000211167
    Dyson, W.G. [605], Kenya K000211163
    Dyson, W.G. [603], Kenya K000211164
    Dyson, W.G. [604], Kenya K000211165
    Robertson, S.A. [6099], Kenya K000211174
    Lucas, G.L.L. [24], Kenya K000211183
    Faden, R.B. [436], Kenya K000211171
    Faden, R.B. [27], Kenya K000211173
    Irwin [419], Kenya K000211180
    Napper, D.M. [1258], Kenya K000211182
    Kibuwa, S.P. [2491], Kenya K000211168
    Paulo, S. [477], Kenya K000211181
    Ament, J.G. [288], Kenya K000211161
    Gwynne, M.D. [12593], Kenya K000211184
    Pratt, D.J. [508], Kenya K000211179
    Battiscombe, E. [207], Kenya Populus denhardtiorum K000211177
    Battiscombe, E. [207], Kenya Populus denhardtiorum K000211176
    Battiscombe, E. [207], Kenya Populus denhardtiorum K000211175
    Thomas, F. [49], Kenya Populus denhardtiorum K000211178 isosyntype

    First published in Rhodora 47: 362 (1945)

    Accepted by

    • Wilmot-Dear, C.M. (1985). Flora of Tropical East Africa, Salicaceae: 1-7.

    Literature

    Kew Backbone Distributions
    • Wilmot-Dear, C.M. (1985). Flora of Tropical East Africa, Salicaceae: 1-7.
    Flora of Tropical East Africa
    • Dale & Greenway, Kenya Trees and Shrubs p. 493 (1961).
    • Rouleau in Rhodora 47: 362 (1945).

    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 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