Disa walteri Schltr.

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

[FTEA]

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

Morphology General Habit
A terrestrial herb 2–5 dm. high, glabrous except for the roots.
Vegetative Multiplication Tubers
Tubers ellipsoid, ± 2 cm. long and 1.5 cm. in diameter, sparsely pubescent or tomentose.
Morphology Roots
Roots flexuous, slender, sparsely pubescent.
Morphology Stem
Fertile stem slender, somewhat flexuous, with several distant lanceolate acuminate sheaths.
Morphology Leaves
Leaves in a tuft on the sterile stem, 5–7, suberect, rather flexuous, narrowly linear, stiff, 17–24 cm. long, 1–3 mm. broad, with several very prominent veins and thickened margins; the vascular bundles of the old leaves remain as fibres.
Morphology Reproductive morphology Inflorescences
Inflorescence up to 6 cm. long, rather closely 1–9-flowered; bracts narrowly lanceolate, acuminate, 14–18 mm. long, longer than or equalling the pedicel with ovary.
Morphology Reproductive morphology Flowers
Flowers suberect, pink, madder-red or crimson, sometimes with a dark red spot at the base of the lip; pedicel with ovary almost straight, 11–14 mm. long.
Morphology Reproductive morphology Flowers Calyx
Dorsal sepal erect, hemispherical and very convex, almost orbicular from the front, without any distinct dorsal spur, 8–14 mm. long, 10–16 mm. broad, shortly apiculate; laterals spreading downwards, narrowly elliptical-oblong, obtuse, ± 1 cm. long and 5 mm. broad.
Morphology Reproductive morphology Flowers Corolla
Petals erect, inside the hood of the dorsal sepal, broadened and cordate at the base on the front margin, the upper part much curved forward and acute, somewhat widened above, ± 7 mm. long and 2 mm. broad.
Morphology Reproductive morphology Flowers Labellum
Lip projecting forwards, cuneate and entire at the base, ± obscurely 3-lobed below the middle, the margins of the lobes divided into numerous slender threads, altogether 2–2.5 cm. long and up to 12 mm. broad.
Morphology Reproductive morphology Flowers Column
Column very short; anther horizontal, ± 7.5 mm. long, viscidia of the pollinia 2, distinct; stigma in front of the anther, cushion-like, ± 2.5 mm. in diameter, rostellum 3-lobed, all the lobes linear, erect.
Habitat
Damp upland grassland and rock-clefts; 2200–2800 m.
Distribution
T7 not known elsewhere

Native to:

Tanzania

Disa walteri Schltr. appears in other Kew resources:

First published in Bot. Jahrb. Syst. 53: 544 (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

Flora of Tropical East Africa

  • Schltr. in A. Engler, Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 53: 544 (1915), in obs.

  • 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 2022. 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 2022. 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