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This genus is accepted, and its native range is Tropical & S. Africa, W. Indian Ocean.

[FTEA]

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

Morphology General Habit
Terrestrial herbs with tuberous roots
Morphology Stem
Stems unbranched, leafy
Morphology Leaves
Leaves scattered along the flowering stem or on separate sterile shoots
Morphology Reproductive morphology Inflorescences
Inflorescence terminal, 1- to many-flowered
Morphology Reproductive morphology Flowers
Flowers resupinate, variously coloured
Morphology Reproductive morphology Flowers Calyx
Sepals free, the dorsal erect, hooded or helmet-shaped, usually spurred, the laterals ± spreading
Morphology Reproductive morphology Flowers Corolla
Petals at the base ± adnate to the column, often included in the dorsal sepal, variable in shape
Morphology Reproductive morphology Flowers Labellum
Lip usually small and narrow, not spurred
Morphology Reproductive morphology Flowers Column
Column short; anther erect, horizontal or reflexed, the loculi parallel; pollinaria 2, each with sectile pollinium, caudicle and naked viscidium; stigmas united into a cushion below the rostellum, rostellum small, ± 3-lobed, the middle lobe small, folded, the side lobes short, fleshy, often adnate to the petals
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary twisted, almost terete
Morphology Reproductive morphology Fruits
Capsule cylindric, club-shaped or narrowly ellipsoid.

[FZ]

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

Morphology General Habit
Terrestrial herb with perennating tubers.
Vegetative Multiplication Tubers
Tubers testicular, rarely absent.
Morphology General
Sterile shoots produced occasionally, to 15 cm long with several basal sheaths and several erect conduplicate acute leaves to 40 cm long. Fertile shoots to 100 cm tall.
Morphology Leaves
Leaves radical, basal or cauline, linear to ovate, soft to rigid, lax to imbricate, monomorphic to dimorphic, green at flowering time, occasionally hysteranthous, conduplicate to flat, grading into the floral bracts or sharply distinct from the floral bracts.
Morphology Reproductive morphology Inflorescences
Inflorescence racemose with one to numerous flowers.
Morphology Reproductive morphology Flowers
Flowers not resupinate, resupinate or doubly resupinate, 4–80 mm in diameter, usually red or white, rarely blue or yellow or green.
Morphology Reproductive morphology Inflorescences Bracts
Bracts usually green, ovate, acute or acuminate, rarely dry and brown.
Morphology Reproductive morphology Flowers Calyx
Lateral sepals lanceolate to broadly ovate, rounded to acuminate, often keeled, patent, sometimes ascending or descending. Dorsal sepal erect, galeate, rarely cucullate or dish-shaped, usually ovate, rarely oblong or spathulate, with a spur which is obsolete to 8 cm long, slender or rarely massive, rarely flattened or with a dorsal or ventral groove, horizontal, descending or ascending.
Morphology Reproductive morphology Flowers Corolla
Petals lanceolate to square, erect or reflexed, acute or truncate, the apex curving over the anther or over the rostellum, or curved out of the galea, often with a complex plane shape.
Morphology Reproductive morphology Flowers Labellum
Lip usually lanceolate, rarely spathulate or broadly ovate, occasionally linear.
Morphology Reproductive morphology Flowers Column
Rostellum 3-lobed; lateral lobes erect, square or horn-like, flat or canaliculate, free or fused to the petals by a long keel; central lobe usually small, fleshy, rarely tall.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anther 2-celled, horizontal, ascending or pendent; viscidia usually separate, borne on the lateral rostellum arms.
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma pedicellate or sessile, the surface flat, concave or convex, tripulvinate with the rear cushion often smaller than the lateral cushions.

[FZ]

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

Morphology General Habit
Terrestrial herb, perennating by tubers.
Vegetative Multiplication Tubers
Tubers testicular.
Morphology Leaves Leaf sheaths
Basal sheaths hyaline, obtuse.
Morphology Leaves
Leaves cauline, usually imbricate; leaf bases sheathing; blades usually erect, elliptic to linear-lanceolate, the lowermost the largest, the upper grading into the floral bracts.
Morphology Reproductive morphology Inflorescences
Floral bracts often overtopping the flowers, ovate to lanceolate, acute to acuminate. Inflorescence dense to lax, cylindric to secund.
Morphology Reproductive morphology Flowers
Flowers resupinate, purplish, brown or green.
Morphology Reproductive morphology Flowers Calyx
Dorsal sepal shallowly galeate, 2.5–15 mm long, usually oblong, obtuse, usually with a spur pendent from the base of the galea; spur slender or clavate, obsolete to longer than the galea. Lateral sepals patent or reflexed, often shorter than the galea, usually oblong.
Morphology Reproductive morphology Flowers Corolla
Petals obliquely narrowly ovate-oblong, acute to bifid; the broad base enclosing the anther; the apex erect within the galea, or partially exserted from the galea.
Morphology Reproductive morphology Flowers Labellum
Lip patent to pendent, linear to elliptic, subfleshy.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anther horizontal to semi-pendent with a single large concrete viscidium and 2 cells.
Morphology Reproductive morphology Flowers Column
Rostellum simple with a deep notch containing the viscidium and with 2 often well developed lateral flanges flanking the anterior part of the anther.
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma equally or unequally tripulvinate, shortly stipitate to as tall as the rostellum.
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary usually twisted, 5–25 mm long.

[FZ]

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

Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anther horizontal or ± pendent, 2-celled with cells parallel; viscidia 2, separate or fused.
Morphology Reproductive morphology Flowers Column
Rostellum erect, lanceolate, acute, equally 3-lobed, rarely with the lateral lobes canaliculate and the central lobe absent.
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma horizontal, shortly pedicellate, the odd lobe smaller than the lateral lobes.
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary patent to ± spreading, 1–1.3 cm long.
Morphology General Habit
Terrestrial herb perennating by tubers.
Vegetative Multiplication Tubers
Tubers testicular, 1–6 cm long.
Morphology Stem
Stem erect, grasslike, 10–100 cm tall, base usually sheathed in old leaf fibres.
Morphology Leaves
Basal leaves 5–20, linear, flat or rolled, subsclerophyllous, produced during, before or after flowering; cauline leaves brown, scattered or imbricate on the stem, acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence lax, 1–30-flowered.
Morphology Reproductive morphology Inflorescences Bracts
Bracts dry, usually not as long as the flowers, ± broadly ovate, acuminate to setaceous.
Morphology Reproductive morphology Flowers
Flowers resupinate, usually blue or shades of blue, to white with pale blue veins, rarely purplish-red with green parts.
Morphology Reproductive morphology Flowers Perianth
Spur borne horizontally from the base of the galea, at length straight, decurved or curved upwards, rarely longer than the sepals, cylindrical or conical.
Morphology Reproductive morphology Flowers Calyx
Lateral sepals usually patent, 6–30 mm long, lanceolate to ovate, obtuse to acute. Dorsal sepal erect to angled forwards, generally galeate, rounded to acuminate, usually ovate in front view.
Morphology Reproductive morphology Flowers Corolla
Petals with a basal anticous lobe; lobe oblong-ovate, flanking the stigma; petal limb lower part linear or lorate, reflexed and flanking the anther; petal limb upper part lanceolate to expanded fan-like or more or less bifid, gently to abruptly curving upwards behind or near the apex of the anther.
Morphology Reproductive morphology Flowers Labellum
Lip ± dissected, rarely entire, usually ovate in outline, rarely spathulate, always specialized in some way.

Native to:

Angola, Burundi, Cameroon, Cape Provinces, Central African Repu, Congo, Ethiopia, Free State, Gabon, Guinea, Ivory Coast, Kenya, KwaZulu-Natal, Lesotho, Liberia, Madagascar, Malawi, Mozambique, Niger, Nigeria, Northern Provinces, Rwanda, Réunion, Sierra Leone, Sudan, Swaziland, Tanzania, Uganda, Yemen, Zambia, Zaïre, Zimbabwe

Introduced into:

South Australia, Tasmania, Victoria, Western Australia

Disa P.J.Bergius appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Zambia 17326.014
Zambia 33968.000
Zambia 34407.000
Holmes, W.D. [020 or 0143], Zambia 75902.000
Williamson, G. [725], Zambia 11887.015
Williamson, G. [632], Zambia 17326.010
Williamson, G. [652], Zambia 1800.068
Williamson, G. [713], Zambia 33139.000
Williamson, G. [659], Zambia 33144.000
Williamson, G. [307], Zambia 33162.000
Williamson, G. [682], Zambia 33167.000
Williamson, G. [624], Zambia 33754.000
Williamson, G. [184], Zambia 6049.372
Morze, G. [147], Zambia 31769.000
Holmes [14], Zambia 77386.000
Holmes [113 106 107] 77387.000
Roberts, D. [119 or 120], Madagascar 76704.000

First published in Descr. Pl. Cap.: 348 (1767)

Accepted by

  • Bytebier, B., Bellstedt, D.U. & Linder, H.P. (2008). A new phylogeny-based sectional classification for the large African orchid genus Disa Taxon 57: 1233-1251.
  • Govaerts, R. (2003). World Checklist of Monocotyledons Database in ACCESS: 1-71827. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Pridgeon, A.M., Cribb, P.J., Chase, M.C. & Rasmussen, F.N. (2001). Orchidoideae (Part 1) Genera Orchidacearum 2: 1-416. Oxford University Press, New York, Oxford.

Literature

Flora of West Tropical Africa

  • F.T.A. 7: 275.
  • Pl. Cap. 348, t. 4, fig. 7 (1767)

Flora Zambesiaca

  • Descr. Pl. Cap.: 348 (1767).

Flora of Tropical East Africa

  • Fl. Cap.: 348 (1767)

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.

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. 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 2021. 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

Kew Science Photographs
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