Orchidaceae
Polystachya

Polystachya lukwangulensis P.J.Cribb

First published in Kew Bull. 32: 762 (1978)
This species is accepted
The native range of this species is Tanzania (Uluguru Mountains). It is a pseudobulbous epiphyte and grows primarily in the wet tropical biome.

Descriptions

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/179818/1591225

Conservation
DD - data deficient
[IUCN]

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

Morphology General Habit
An epiphytic plant to 10 cm. high.
Morphology Stem
Stems clustered, on a short ascending rhizome, pseudobulbous or obscurely pseudobulbous, with an obvious node in middle, conical or subpyriform, 1 cm. long, 0.45 cm. in diameter, about 4-leaved.
Morphology Leaves
Leaves suberect, distichous, spaced at 1 cm. intervals, obliquely angled, linear or slightly tapering towards apex, subacute or minutely unequally bilobed at apex, 6,3 cm. long, 0.85 cm. wide, articulated to an ancipitous sheathing base, 0.9–2.6 cm. long.
Morphology Reproductive morphology Inflorescences
Inflorescence erect, shorter than the leaves, ± 4-flowered, 4.5 cm. long; peduncle pubescent, subtended by an ancipitous acute sheath; bracts lanceolate, acuminate, 7 mm. long.
Morphology Reproductive morphology Flowers
Flowers pubescent on outer surface, with green tepals lined with red, lip whitish lined with red; pedicel and ovary densely pubescent.
Morphology Reproductive morphology Flowers Calyx
Dorsal sepal lanceolate, acute, 8 mm. long, 4 mm. wide; lateral sepals falcate-lanceolate, acute, 11 mm. long, 7 mm. wide, forming with the column-foot a broadly conical mentum 5 mm. high.
Morphology Reproductive morphology Flowers Corolla
Petals linear-lanceolate, slightly falcate, acute, 9 mm. long, 2 mm. wide.
Morphology Reproductive morphology Flowers Labellum
Lip shortly clawed, ecallose, papillose, 3-lobed just below the middle, 11 mm. long, 9 mm. wide; side lobes erect, falcately oblong, rounded at apex; mid-lobe subquadrate-orbicular, apiculate, margins undulate-erose.
Morphology Reproductive morphology Flowers Column
Column broad, 4.5 mm. long, white; stigma transversely oblong.
Figures
Fig. 81.
Habitat
In upland rain-forest; 2200 m.
Distribution
known only from the type T6
[FTEA]

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: threatened. Confidence: confident
[AERP]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • 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.
    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0