Tridactyle nigrescens Summerh.

This species is accepted, and its native range is E. DR Congo to E. Tropical Africa.

[FTEA]

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

Morphology General Habit
An epiphyte or lithophyte, with stems 13–30 cm. long, 1–1.5 mm. in diameter.
Morphology Roots
Roots 1–1.5 mm. in diameter, smooth.
Morphology Leaves
Leaves drying black, fleshy-coriaceous, conduplicate, reflexed or spreading, linear, unequally acutely bilobed at the apex, 3–6.5 cm. long, 1–2.5 mm. wide, articulated to 1 cm. long sheaths.
Morphology Reproductive morphology Inflorescences
Inflorescences 5–6 mm. long, 2–3-flowered; peduncle 1 mm. long; bracts ovate, amplexicaul, 0.5 mm. long.
Morphology Reproductive morphology Flowers
Flowers pale lime-green or dull yellow-orange, sweetly scented; pedicel and ovary 2.5–3 mm. long, sparsely lepidote.
Morphology Reproductive morphology Flowers Calyx
Dorsal sepal elliptic, obtuse, 3–3.5 mm. long, 1.6–2.1 mm. wide; lateral sepals oblong-ovate, obtuse, 3–3.5 mm. long, 1.7–2.3 mm. wide.
Morphology Reproductive morphology Flowers Corolla
Petals lanceolate, acute, 2.7–3.8 mm. long, 1–1.3 mm. wide.
Morphology Reproductive morphology Flowers Labellum
Lip 3-lobed at the apex, auriculate at the base, 2.6–4 mm. long, 2–2.2 mm. wide; side lobes longer than the mid-lobe, 3-lacerate at the apex; mid-lobe triangular.
Morphology Reproductive morphology Flowers Spur
Spur pendent, slightly inflated in middle, 6–7.5 mm. long.
Morphology Reproductive morphology Flowers Column
Column 1–1.3 mm. long.
Habitat
In dry sclerophyllous forest, woodland, riverine forest and on rocks above lake; 1150–2200 m.
Distribution
K3 T1 U2 U4

Native to:

Kenya, Tanzania, Uganda, Zaïre

Tridactyle nigrescens Summerh. appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Dec 5, 1947 Eggeling, W.J. [3722], Uganda K000306480 Unknown type material Yes
Dec 5, 1947 Eggeling, W.J. [3722], Uganda K000306481 Unknown type material Yes
Hendrichx, F.L., Congo, DRC 14963.000 No
Tanzania 14964.000 No
14966.000 No
24725.000 No
Tweedie, E.M. [3492], Kenya 31192.000 No
Kenya 3152.000 No
Jackson, T.H.E. [3492], Kenya 32368.000 No
Germain, R. [3602], Congo, DRC 8703.000 No
Tweedie, E.M. [557], Tanzania 8722.000 No

First published in Kew Bull. 3: 288 (1948)

Accepted by

  • Govaerts, R. (2003). World Checklist of Monocotyledons Database in ACCESS: 1-71827. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Szlachetko, D.L. & Mytnik-Ejsmont, J. (2021). Orchidaceae of West-Central Africa 3: 1-555. Koeltz Scientific books, Koenigsheim, Germany.

Literature

Kew Backbone Distributions

  • Szlachetko, D.L. & Mytnik-Ejsmont, J. (2021). Orchidaceae of West-Central Africa 3: 1-555. Koeltz Scientific books, Koenigsheim, Germany.

Flora of Tropical East Africa

  • Summerh. in Kew Bulletin 3: 288 (1948).

  • Flora of Tropical East Africa

    Flora of Tropical East Africa
    http://creativecommons.org/licenses/by-nc-sa/3.0

  • Herbarium Catalogue Specimens

    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 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