Orchidaceae
Polystachya

Polystachya moreauae P.J.Cribb & Podz.

First published in Kew Bull. 32: 698 (1978)
This species is accepted
The native range of this species is NE. Zambia. It is a pseudobulbous epiphyte or lithophyte and grows primarily in the seasonally dry tropical biome.

Descriptions

Orchidaceae, I. la Croix & P.J. Cribb. Flora Zambesiaca 11:2. 1998

Morphology General Habit
Epiphytic or lithophytic herb up to c. 24 cm tall; pseudobulbs clustered.
Vegetative Multiplication Pseudobulbs
Pseudobulbs up to 8.5 × 0.5 cm, narrowly cylindrical, 2-noded, covered with 3 loose tubular sheaths when young, 1-leafed.
Morphology Leaves
Leaf erect, 10–14.7 × 2–3 cm, oblanceolate to narrowly elliptic-oblong, obtuse, articulated to a basal sheath 9 mm long.
Morphology Reproductive morphology Inflorescences
Inflorescence (floral axis) slightly longer than the leaf, up to 15 cm long, unbranched or 1–2-branched, laxly several-flowered; peduncle and rhachis pubescent, subtended by a basal sheath.
Morphology Reproductive morphology Flowers
Flowers pale chrome-yellow, deeper yellow inside.
Morphology Reproductive morphology Flowers Calyx
Dorsal sepal 11 × 4 mm, oblong-ovate, acute; lateral sepals 12 × 9 mm, obliquely oblong-ovate, acuminate or apiculate.
Morphology Reproductive morphology Flowers Corolla
Petals 9 × 4–5 mm, spathulate, obtuse or apiculate, the edges slightly undulate.
Morphology Reproductive morphology Flowers Labellum
Lip 12 × 10–15 mm, 3-lobed in the middle with a central knob-like callus; mid-lobe ovate to suborbicular, apiculate; side lobes erect, semi-elliptic, rounded.
[FZ]

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 Zambesiaca

    • Flora Zambesiaca
    • 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/

  • 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