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  1. Family: Orchidaceae Juss.
    1. Genus: Disa P.J.Bergius
      1. Disa rungweensis Schltr.

        This species is accepted, and its native range is SW. Tanzania to Malawi, Mpumalanga.

    [FZ]

    Orchidaceae, I. la Croix and P.J. Cribb. Flora Zambesiaca 11:1. 1995

    Habit
    Terrestrial herb perennating by testicular tubers. Plants 10–25 cm tall.
    Leaves
    Basal leaves 4–6, semi-erect, 1–3.5 cm long, narrowly elliptic, acute, undulate or crisped on the margins. Cauline leaves mostly sheathing, lanceolate, acute, grading into the floral bracts.
    Inflorescences
    Inflorescence lax, 2.5–4.5 cm long, 2–10-flowered.
    Bracts
    Floral bracts usually as tall as the flowers, ovate to lanceolate, acute to acuminate.
    Flowers
    Flowers variable in colour from greenish-white to pinky-mauve to brown, facing downwards.
    Calyx
    Dorsal sepal galeate; galea 2.5–3 mm long and 1.5–3 mm wide, rounded to obtuse, almost hemisphaerical. Lateral sepals c. 2.5 mm long, oblong to ovate, subacute.
    Spur
    Spur 2.5–3.2 mm long, cylindric, horizontal or ascending, up-curved at the apex and irregularly clavate.
    Corolla
    Petals erect, somewhat curved over the rostellum and partially included within the galea, 1.8–2 mm long, obliquely quadrate-obovate.
    Labellum
    Lip 1.3–1.5 mm long, narrowly oblong, rounded.
    Rostellum
    Rostellum low, flat; lateral lobes square, the central lobe almost obsolete.
    Anthers
    Anther horizontal with a massive connective.
    Stigma
    Stigma massive, pedicellate.
    Ovary
    Ovary 5–8 mm long.
    [FTEA]

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

    Habit
    A terrestrial herb 0.5–3.5 dm. high, glabrous except for the roots.
    Tubers
    Tubers ellipsoid or ovoid, 8–20 mm. long, 5–10 mm. in diameter, densely and shortly tomentose.
    Roots
    Roots slender, flexuous, pubescent.
    Stem
    Stem erect, slender, terete, leafy throughout its length.
    Leaves
    Leaves 10–15, the lowest sheath-like, the next 5–7 in a bunch just above the base of the stem, suberect or spreading, linear to oblong-lanceolate, acute, the largest 1.5–9 cm, long and 2–15 mm. broad, tinged reddish or purplish, the remainder erect, ± adpressed to the stem with only the tips spreading, lanceolate, acute, decreasing in size up the stem.
    Inflorescences
    Inflorescence narrowly cylindrical, 1.5–6.5 cm, long, 1–1.5 cm. in diameter, loosely to rather densely 3- to many-flowered.
    Bracts
    Bracts lanceolate, acuminate, 5–15 mm. long, the lower ones sometimes overtopping the flowers.
    Flowers
    Flowers suberect, greenish-white, pale pink, lilac or purple; pedicel with ovary straight, 5–8 mm. long.
    Calyx
    Dorsal sepal erect, elliptical or almost orbicular, very convex, spurred at the back towards the base, 3–4.5 mm. long and nearly as broad when spread out, the spur horizontal or curved upwards, narrow in the lower part, swollen at the apex, 2.5–3.5 mm. long; laterals projecting forwards, elliptical or oblong-elliptical, rounded, 2.5–3.5 mm. long, ± 2 mm. broad.
    Corolla
    Petals erect, inside the dorsal sepal, very obliquely quadrate-obovate from a narrow base, rounded at the top and much widened on the outer side, 2–3 mm. long, 1.5–2 mm. broad.
    Labellum
    Lip projecting forwards, linear-ligulate, rounded, ± 2 mm. long and 0.5 mm. broad.
    Column
    Column erect, very short; anther horizontal or nearly so, 0.75 mm. long; stigma in front of anther, ± orbicular or transversely elliptical, 0.6 mm. in diameter.
    Habitat
    Steep rocky slopes, among lava or pumice; 2400–3100 m.
    Distribution
    subsp. rhodesiaca in Rhodesia and Mozambique T7

    Images

    Distribution

    Native to:

    Malawi, Northern Provinces, Tanzania

    Other Data

    Disa rungweensis Schltr. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Aug 17, 1982 Croix, I.l.a. [326], Malawi K000283127
    May 13, 1974 Williamson, G. [363], Malawi K000283128
    Jan 1, 1915 Stolz, A. [2437], Tanzania K000077559 isotype
    Zambia 1800.056
    Richards, H.M. [14302], Tanzania 3818.000
    Richards, H.M. [14302], Tanzania K000283130
    Pawek, J. [9113], Malawi K000283132
    Thompson, G.W. [891], Tanzania K000283129
    Thompson, G.W. [969], Tanzania K000283131

    Bibliography

    First published in Bot. Jahrb. Syst. 53: 543 (1915)

    Accepted by

    • Govaerts, R. (2003). World Checklist of Monocotyledons Database in ACCESS: 1-71827. The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions

    • Johnson, S. & Bytebier, B. (2015). Orchids of South Africa. A field guide: 1-536. Struik nature, Cape Town, South Africa.

    Flora of Tropical East Africa

    • Mansf. in F. Fedde, Repertorium Speciorum Novarum Regni Vegetabilis Beih. 68: t. 38/151 (1932).
    • Schltr. in A. Engler, Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 53: 543 (1915).

    Sources

    Flora Zambesiaca
    Flora Zambesiaca
    http://creativecommons.org/licenses/by-nc-sa/3.0

    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