Orchidaceae
Habenaria

Habenaria walleri Rchb.f.

First published in Otia Bot. Hamburg.: 98 (1881)
This species is accepted
The native range of this species is Tropical Africa. It is a tuberous geophyte and grows primarily in the seasonally dry tropical biome.

Descriptions

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: not threatened. Confidence: confident
[AERP]

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

Morphology General Habit
Robust terrestrial herb 40–80 cm tall; tubers 2–4 × 1–2 cm, ovoid or ellipsoid.
Morphology Stem
Stem leafy.
Morphology Leaves
Leaves 7–10, the lowest 1–2 sheath-like, the mid-stem leaves erect or semi-spreading, the largest 6–14 × 1–3.5 cm, lanceolate, acute; the upper ones bract-like.
Morphology Reproductive morphology Inflorescences
Inflorescence 8–28 × 7.5–10 cm, rather laxly 2 to several-flowered; bracts leafy, to 8 cm long, shorter than the pedicel and ovary.
Morphology Reproductive morphology Flowers
Flowers showy, scented, sepals green, petals and lip white.
Morphology Reproductive morphology Flowers Pedicel and Ovary
Pedicel c. 6.5 cm long, ovary 2.5–3 cm long, minutely hairy on ribs.
Morphology Reproductive morphology Flowers Calyx
Dorsal sepal erect, 11–16 × 10–11 mm, ovate, acute, convex; lateral sepals deflexed, c. 20 × 9 mm, obliquely semi-ovate.
Morphology Reproductive morphology Flowers Corolla
Petals 2-lobed almost to base; upper lobe 11–16 × 1.5–3 mm, linear, adnate to dorsal sepal; lower lobe deflexed, 20–32 × 3.5–5.5 mm, lanceolate, acute.
Morphology Reproductive morphology Flowers Labellum
Lip 3-lobed, with an undivided base c. 4 mm long; mid-lobe 15–28 × 2.5–6 mm, oblong, obtuse; side lobes 20–32 × 4–7 mm, the inner edge straight, the outer curved; the apex acute; spur 13–17 cm long, pendent, inflated in apical third.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anther erect, 7–9 mm high; canals 3–5 mm long.
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigmatic arms 8–12 mm long, porrect, club-shaped.
Morphology Reproductive morphology Flowers Rostellum
Rostellum mid-lobe 4 mm high, triangular, acute.
[FZ]

Orchidaceae, V. S. Summerhayes. Flora of West Tropical Africa 3:1. 1968

Morphology General Habit
A slender terrestrial herb 1-4 ft. high
Morphology Reproductive morphology Flowers
Flowers large, white, up to 12, in narrow racemes.
[FWTA]

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

  • Flora of West Tropical Africa

    • Flora of West Tropical 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 Vascular Plants 2026. 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 2026. 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