1. Family: Orchidaceae Juss.
    1. Genus: Aerangis Rchb.f.
      1. Aerangis luteoalba (Kraenzl.) Schltr.

        This species is accepted, and its native range is W. Central & E. Tropical Africa to Ethiopia.

    [FTEA]

    Orchidaceae, V. S. Summerhayes. Flora of Tropical East Africa. 1968

    Habit
    Stem 1–3 cm. long, often pendent with numerous thin flexuous roots which are relatively long for the size of the plant.
    Leaves
    Leaves 2–8, lying in one plane, linear-ligulate or linear-lanceolate, up to 15 cm. long, 6–15 mm. wide, sometimes falcate, unequally bilobed at the apex, the lobes rounded, the shorter lobe sometimes suppressed, fleshy and brittle in the rainy season becoming leathery in the dry season.
    Inflorescences
    Inflorescences arising from the stem below the leaves, arching or pendent racemes bearing few–25 flowers in the upper half or two-thirds, up to 35 cm. long; peduncle slender, terete, bearing 2–3 sheaths; rhachis similar, slightly zigzag; bracts spreading or slightly reflexed, ovate, acute, 3–4 mm. long.
    Flowers
    Flowers arranged in 2 rows all in the same plane, 7–20 mm. apart; perianth parts all spreading, white, cream, greenish, or yellowish white; column similar in colour, or bright red; pedicel with ovary slender, 1–2 cm. long.
    Calyx
    Sepals oblanceolate, acute, 10–15 mm. long, 3–7 mm. wide.
    Corolla
    Petals obovate or broadly oblanceolate, equalling or a little longer than the sepals, 5–10 mm. wide.
    Labellum
    Lip obovate or rhomboid, widest above the middle, acute, 15–20 mm. long, 7–15 mm. wide.
    Spur
    Spur slender, incurved, slightly thickened in the apical half, 2.3–4 cm. long.
    Column
    Column short and thick, 2–3 mm. long; androclinium slightly sloping with frilly margins; rostellum projecting straight downwards; pollinia ovoid; stipes considerably widened in the upper half; viscidium oval or round.
    Fruits
    Capsule 2–2.5 cm. long.

    Distribution

    Native to:

    Cabinda, Cameroon, Central African Repu, Congo, Ethiopia, Kenya, Tanzania, Uganda, Zaïre

    Aerangis luteoalba (Kraenzl.) Schltr. appears in other Kew resources:

    First published in Beih. Bot. Centralbl. 36(2): 118 (1918)

    Accepted by

    • la Croix, I. (2014). Aerangis. Exquisite African orchids to discover, identify and grow: 1-200. Tiber Press, Portland, Oregon.
    • Fischer, E., Rembold, K., Althof, A. & Obholzer, J. (2010). Annotated checklist of the vascular plants of Kakamega forest, Western province, Kenya Journal of East African Natural History 99: 129-226.
    • Govaerts, R. (2003). World Checklist of Monocotyledons Database in ACCESS: 1-71827. The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Govaerts, R. (1995). World Checklist of Seed Plants 1(1, 2): 1-483, 1-529. MIM, Deurne.

    Literature

    Kew Backbone Distributions
    • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
    Flora of Tropical East Africa
    • J. Stewart in Kew Bulletin 34: 309 (1979).
    • Schltr. in Beih. Bot. Centr. 36: 118 (1918).

    Sources

    Flora of Tropical East Africa
    Flora of Tropical East Africa
    http://creativecommons.org/licenses/by-nc-sa/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