Orchidaceae
Habenaria

Habenaria macrotidion Summerh.

First published in Kew Bull. 16: 285 (1962)
This species is accepted
The native range of this species is Zambia. It is a tuberous geophyte and grows primarily in the seasonally dry tropical biome.

Descriptions

Orchidaceae, I. la Croix and P.J. Cribb. Flora Zambesiaca 11:1. 1995

Morphology General Habit
Terrestrial herb 40–55 cm tall; tubers c. 20 × 8 mm, ellipsoid.
Morphology Leaves
Leaves 6–8, the lowermost reduced to sheaths, the stem leaves 3–5, suberect, c. 16 × 1 cm, linear-lanceolate, acute, sheathing at the base; uppermost leaves becoming bract-like.
Morphology Reproductive morphology Inflorescences
Inflorescence 10–16 × 3.5–4 cm, laxly many-flowered; bracts less than half the length of pedicel and ovary.
Morphology Reproductive morphology Flowers
Flowers erect to spreading, pale green.
Morphology Reproductive morphology Flowers Pedicel and Ovary
Pedicel and ovary 17–23 mm long, slightly arched.
Morphology Reproductive morphology Flowers Calyx
Dorsal sepal reflexed, 5–6 × 3 mm, obovate, convex; lateral sepals deflexed, 7–8.5 × 5 mm, obliquely obovate.
Morphology Reproductive morphology Flowers Corolla
Petals 2-lobed almost to base; upper lobe erect, 5–6 × 0.5 mm, linear, densely papillose-ciliolate; lower lobe ± deflexed, 6–7.5 × 2–2.5 mm, lanceolate, acute, slightly fleshy and opaque, glabrous.
Morphology Reproductive morphology Flowers Labellum
Lip deflexed, 3-lobed with a basal claw 1.5–2 mm long; mid-lobe 9–10 × 0.5 mm, linear, obtuse; side lobes 5–6 × 0.3 mm, linear, acute; spur 8–10 mm long, pendent, only very slightly swollen in apical half.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anther erect, 3–4 mm high; canals c. 4 mm long, porrect, the tips upturned.
Morphology Reproductive morphology Flowers Labellum Auricle
Auricles c. 1.7 mm long, deeply 2-lobed, the lobes lanceolate-linear.
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigmatic arms porrect, 4–4.5 mm long; rostellum mid-lobe 2 mm long.
[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 2025. 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 2025. 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