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This species is accepted, and its native range is Tanzania (Uluguru Mountains).
A specimen from Kew's Herbarium

[FTEA]

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

Morphology General Habit
An epiphytic herb, 22–34 cm. high.
Vegetative Multiplication Pseudobulbs
Pseudobulbs from a short rhizome, tightly clustered, narrowly ovoid-conical, slightly compressed, 2.5–5 cm. long, 1.3–2 cm. in diameter, clothed in 3–5 basal sheaths.
Morphology Leaves
Leaf lanceolate to oblanceolate, acute, cuneate below, coriaceous, 22–29 cm. long, 2.5–3.2 cm. broad, articulated 2–3.5 cm. above the pseudobulb apex.
Morphology Reproductive morphology Inflorescences
Inflorescence shorter than the leaf, racemose, 12–20 cm. long, up to 6 flowers borne successively; peduncle stout, 12–16 cm. long; basal sheath membranaceous; bracts spreading, ovate-triangular, acuminate, 8–10 mm. long.
Morphology Reproductive morphology Flowers
Flowers cream with a mauve-purple lip and yellow callus.
Morphology Reproductive morphology Flowers Calyx
Dorsal sepal oblong- ovate, apiculate, 25 mm. long, 8–9 mm. broad; lateral sepals obliquely triangular, falcate, 25 mm. long, 11–18 mm. broad; mentum broadly conical, rounded, 10–17 mm. high.
Morphology Reproductive morphology Flowers Corolla
Petals spreading, elliptic-spathulate, acute, 20 mm. long, 7–9 mm. broad.
Morphology Reproductive morphology Flowers Labellum
Lip strongly recurved in the middle, oblong, 3-lobed in the middle, 30 mm. long, 18 mm. broad, long-pubescent at the base; side lobes elliptic-ovate, papillose; mid-lobe oblong- triangular, shortly apiculate, 15 mm. long, 10 mm. broad; callus fleshy in basal half, obscurely 3-lobed in front.
Morphology Reproductive morphology Flowers Column
Column subterete, winged, 5 mm. long; foot 15 mm. long, pubescent below; pollinia subquadrate-globose.
Habitat
Rain-forest; 1450 m.
Distribution
not known elsewhere T6

Native to:

Tanzania

Polystachya porphyrochila J.Stewart appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Pocs, T. [6154/X], Tanzania K000242337
Jannerup, P.L. [0108], Tanzania K000390090
Jannerup, P.L. [0108], Tanzania K000390089

First published in Amer. Orchid Soc. Bull. 42: 592 (1973)

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.

Literature

Flora of Tropical East Africa

  • J. Stewart in Bull. Amer. Orch. Soc. 47: 592, fig. (1973).

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