1. Family: Lamiaceae Martinov
    1. Genus: Rotheca Raf.
      1. Rotheca luembensis (De Wild.) R.Fern.

        This species is accepted, and its native range is Tanzania to S. Tropical Africa.

    [FZ]

    Flora Zambesiaca. Vol 8, Pt 7. Avicenniaceae, R. Fernandes. Nesogenaceae, M.A. Diniz. Verbenaceae, R. Fernandes. Lamiaceae, R. Fernandes. 2005.

    General
    Perennial herb or suffrutex 25–80(100) cm tall, from a long creeping woody rootstock
    Stem
    Stems few to many, erect, unbranched or occasionally somewhat branched, usually with a ± dense indumentum of spreading, ± rigid, short hairs Stems few to many, erect, unbranched or occasionally somewhat branched, usually with a ± dense indumentum of spreading, ± rigid, short hairs.
    Leaves
    Leaves in whorls of 3 or opposite, rarely in whorls of 4, sessile to shortly petiolate; internodes up to 10 cm long; lamina 4–18.5 × 1.2–6 cm, oblong-obovate, oblong-lanceolate, elliptic or obovate-cuneate, up to 5-times longer than wide but more usually 2.5-times longer than wide, widest above the middle, ± long-attenuate towards the base, obtuse to acute or shortly acuminate at the apex, entire to coarsely serrate-dentate in the upper 1/3, ± concolorous, usually not becoming dark on drying, pubescent on both surfaces with hairs similar to those of stems and branches but shorter, with longer hairs on the midrib beneath, the hairs becoming rigid at the base making the lamina ± scabridulous; petiole 1–2 mm long or absent Leaves in whorls of 3 or opposite, rarely in whorls of 4, sessile to shortly petiolate; internodes up to 10 cm long; lamina 4–18.5 × 1.2–6 cm, oblong-obovate, oblong-lanceolate, elliptic or obovate-cuneate, up to 5-times longer than wide but more usually 2.5-times longer than wide, widest above the middle, ± long-attenuate towards the base, obtuse to acute or shortly acuminate at the apex, entire to coarsely serrate-dentate in the upper 1/3, ± concolorous, usually not becoming dark on drying, pubescent on both surfaces with hairs similar to those of stems and branches but shorter, with longer hairs on the midrib beneath, the hairs becoming rigid at the base making the lamina ± scabridulous; petiole 1–2 mm long or absent.
    Inflorescences
    Inflorescence a terminal, pubescent panicle, 7–23 cm long, formed by opposite 2–5-flowered cymes, sometimes with 2–3 additional cymes in the axils of the uppermost leaves The uppermost cymes subtended by foliaceous sessile bracts; the lowermost bracts up to 6 × 2 cm Inflorescence a terminal, pubescent panicle, 7–23 cm long, formed by opposite 2–5-flowered cymes, sometimes with 2–3 additional cymes in the axils of the uppermost leaves.
    Peduncles
    Peduncles of the lowermost cymes up to 5.5 cm long Peduncles of the lowermost cymes up to 5.5 cm long.
    Calyx
    Calyx pale green, red in the upper part when fresh, red-purple on drying, (4)4.5–6 mm long and c. 7 mm in diameter, obconical-campanulate, subglabrous to ± appressed-hairy; lobes 3–4 mm wide at the base, rounded or oblong and obtuse, ciliate Calyx pale green, red in the upper part when fresh, red-purple on drying, (4)4.5–6 mm long and c. 7 mm in diameter, obconical-campanulate, subglabrous to ± appressed-hairy; lobes 3–4 mm wide at the base, rounded or oblong and obtuse, ciliate.
    Corolla
    Corolla variable in colour, green to greenish-white except for the median bright blue lobe, or pale blue, or pale blue and yellow-green, or white with the lateral lobes light green and the median lobe purple, or 4 lobes pale muddy blue and the median lobe royal-blue, or 4 lobes greenish-mauve and the median lobe violet, or green without and brownish within; corolla tube 5–6 mm long, corolla lobes ciliate; limb of corolla bud 5–6 mm in diameter, subspherical, glabrous or subglabrous to ± densely hairy Corolla variable in colour, green to greenish-white except for the median bright blue lobe, or pale blue, or pale blue and yellow-green, or white with the lateral lobes light green and the median lobe purple, or 4 lobes pale muddy blue and the median lobe royal-blue, or 4 lobes greenish-mauve and the median lobe violet, or green without and brownish within; corolla tube 5–6 mm long, corolla lobes ciliate; limb of corolla bud 5–6 mm in diameter, subspherical, glabrous or subglabrous to ± densely hairy.
    Anthers
    Anthers c. 2 mm long, yellow turning brown; filaments, style and stigma mauve to purple.
    Habit
    Perennial herb or suffrutex 25–80(100) cm tall, from a long creeping woody rootstock.
    Bracts
    The uppermost cymes subtended by foliaceous sessile bracts; the lowermost bracts up to 6 × 2 cm.
    Stamens
    Anthers c. 2 mm long, yellow turning brown; filaments mauve to purple.
    Style
    Style and stigma mauve to purple.

    Images

    Distribution

    Native to:

    Angola, Malawi, Mozambique, Tanzania, Zambia, Zaïre

    Rotheca luembensis (De Wild.) R.Fern. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Welwitsch [5725], Angola Clerodendrum luembense K001008626
    Couto, C. [284], Angola Clerodendrum luembense K001008625

    First published in Kew Bull. 55: 149 (2000)

    Accepted by

    • Fernandes, R. & Diniz, M.A. (2005). Avicenniaceae, Nesogenaceae, Verbenaceae and Lamiaceae (subfams, Viticoideae and Ajugoideae) Flora Zambesiaca 8(7): 1-161. Royal Botanic Gardens, Kew.
    • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Flora Zambesiaca
    • Mem. Soc. Brot. 30 : 39 (1998).
    • Phytologia 62 : 127 (1987) pro parte.
    • Bot. Jahrb. Syst. 68 : 84 (1936).
    Kew Backbone Distributions
    • Fernandes, R. & Diniz, M.A. (2005). Avicenniaceae, Nesogenaceae, Verbenaceae and Lamiaceae (subfams, Viticoideae and Ajugoideae) Flora Zambesiaca 8(7): 1-161. Royal Botanic Gardens, Kew.

    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 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