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This species is accepted, and its native range is E. DR Congo to Kenya.
A specimen from Kew's Herbarium

[FTEA]

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

Morphology General Habit
An epiphytic herb 4.5–28.5 cm. high.
Vegetative Multiplication Pseudobulbs
Pseudobulbs from a short creeping rhizome, loosely clustered, narrowly cylindric, 1.5–15.4 cm. long, 2.1–2.5 mm. in diameter, clothed in 2–3 membranous basal sheaths.
Morphology Leaves
Leaf elliptic to ovate, obtuse, auriculate at the base, coriaceous, 3–13 cm. long, 1–3.3 cm. broad, articulated 2 mm. above the apex of the pseudobulb.
Morphology Reproductive morphology Inflorescences
Inflorescence longer than the leaf, a 2–8 branched panicle, 6–17.5 cm. long, up to 60-flowered; peduncle slender to stout, up to 7.5 cm. long, ± sparsely pubescent, basal sheath membranous; bracts triangular-ovate, apiculate, amplexicaul, 1–2.5 mm. long.
Morphology Reproductive morphology Flowers
Flowers yellow or greenish yellow, spotted with magenta.
Morphology Reproductive morphology Flowers Calyx
Dorsal sepal oblong-lanceolate, apiculate, 4–5.4 mm. long, 2–2.5 mm. broad concave; lateral sepals obliquely triangular, 4–7.3 mm. long, 3.5–6 mm. broad; mentum ovoid, to 6 mm. high.
Morphology Reproductive morphology Flowers Corolla
Petals linear to spathulate, obtuse, 3.5–6 mm. long, 1.2–1.5 mm. broad.
Morphology Reproductive morphology Flowers Labellum
Lip very fleshy, sessile, distinctly 3-lobed, 4.4–7 mm. long, 2–6.5 mm. broad; side lobes erect, rounded below, triangular and acute above, fleshy; mid-lobe fleshy, linear, truncate, shortly apiculate behind, 2–2.8 mm. long, 0.9–1.5 mm. broad.
Morphology Reproductive morphology Flowers Column
Column subterete, 1–2.3 mm. long; foot 2.9–4 mm. long; pollinia subglobose.
Habitat
Montane forest or dry montane woodland; 2100 m.
Distribution
K3

Native to:

Kenya, Rwanda, Zaïre

Polystachya pachychila Summerh. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Sep 24, 1951 Tweedie [302], Congo, DRC K000242342 holotype
Finney, A., Congo, DRC 48535.000
Finney, A., Congo, DRC 48579.000
Mulder [s.n.], Rwanda 55960.000
Tweedie, E.M., Congo, DRC 9158.000 Unknown type material
Rwanda 74185.000

First published in Kew Bull. 8: 139 (1953)

Accepted by

  • Govaerts, R. (2003). World Checklist of Monocotyledons Database in ACCESS: 1-71827. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Mytnik-Ejsmont, J. (2011). A monograph of the subtribe Polystachyinae Schltr. (Orchidaceae): 1-400. Fundacja Rozwoju Uniwersytetu Gdanskiego.
  • Szlachetko, D.L. & Mytnik-Ejsmont, J. (2015). Orchidaceae of West-Central Africa 2: 1-300. Koeltz Scientific books, Koenigsheim, Germany.

Literature

Kew Backbone Distributions

  • Mytnik-Ejsmont, J. (2011). A monograph of the subtribe Polystachyinae Schltr. (Orchidaceae): 1-400. Fundacja Rozwoju Uniwersytetu Gdanskiego.

Flora of Tropical East Africa

  • Piers, Orch. E. Afr., ed. 2: 132 (1968).
  • Summerh. in Hook., Ic. Pl. 36, t. 3565 (1956).
  • Summerh. in Kew Bulletin 8: 139 (1953)

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 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