Orchidaceae
Eulophia

Eulophia angolensis (Rchb.f.) Summerh.

First published in Kew Bull. 13: 76 (1958)
This species is accepted
The native range of this species is Tropical & S. Africa. It is a rhizomatous 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, V. S. Summerhayes. Flora of West Tropical Africa 3:1. 1968

Morphology Leaves
Leaves narrowly lanceolate, 1-21/2 in. wide
Morphology Reproductive morphology Flowers
Flowers with reddish or brownish sepals and yellow petals and lip.
[FWTA]

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

Morphology General Habit
Terrestrial herb 60–210 cm tall.
Vegetative Multiplication Rhizomes
Perennating organs fleshy, subterranean, rhizomatous, stout, cylindric, many-noded, branching, 1–5 cm in diameter, with white roots, 2 mm in diameter, emerging all over surface.
Morphology Leaves
Leaves 2–4, 50–140 × 0.7–4.3 cm, linear-lanceolate, acuminate, plicate, erect.
Morphology Reproductive morphology Inflorescences
Inflorescence laxly many-flowered, rarely 1-branched; peduncle stout, 1–2 cm in diameter, bearing 5 acute to acuminate sheaths; rhachis 16–40 cm long; bracts 1–2.5 cm long, ovate, lanceolate or oblanceolate.
Morphology Reproductive morphology Flowers Pedicel and Ovary
Pedicel and ovary 14–30 mm long.
Morphology Reproductive morphology Flowers
Flowers spreading or subnutant; sepals purple-brown or yellow; petals and lip yellow.
Morphology Reproductive morphology Flowers Calyx
Dorsal sepal 16–27 × 5.3–7.5 mm, erect or reflexed, ligulate-spathulate, obtuse, concave towards apex, lateral sepals similar but suberect or reflexed, 16–25 × 5.3–7.5 mm.
Morphology Reproductive morphology Flowers Corolla
Petals 16–25.5 × 9.5–13.8 mm, parallel to and covering column, elliptic, rounded at apex.
Morphology Reproductive morphology Flowers Labellum
Lip 16–25 × 10–16 mm, 3-lobed, saccate at base; side-lobes elliptic, rounded; mid-lobe oblong or obovate, obtuse or rounded, undulate on margin; callus of 3 tall crenulate ridges, flexuous in front.
Morphology Reproductive morphology Flowers Column
Column 10–11 mm long; foot 3–4 mm long; anther-cap 2-horned at apex.
Morphology Reproductive morphology Fruits
Fruit pendent 3–4.5 cm long.
[FZ]

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

Morphology General Habit
A terrestrial herb 60–210 cm. tall.
Vegetative Multiplication Rhizomes
Perennating organs fleshy, subterranean, rhizomatous, stout, cylindric, many-noded, branching, 1–5 cm. diameter, with white, 2 mm. diameter roots emerging all over surface.
Morphology Leaves
Leaves 2–4, plicate, erect, linear-lanceolate, acuminate, 50–130 cm. long, 0.7–4.3 cm. wide.
Morphology Reproductive morphology Inflorescences
Inflorescence laxly many-flowered, rarely 1-branched; peduncle stout, 1–2 cm. diameter, bearing 5 acute to acuminate sheaths; rhachis 16–40 cm. long; bracts ovate, lanceolate or oblanceolate, 1–2.5 cm. long.
Morphology Reproductive morphology Flowers
Flowers spreading or subnutant; sepals purple-brown or yellow; petals and lip yellow; pedicel and ovary 14–21 mm. long.
Morphology Reproductive morphology Flowers Calyx
Dorsal sepal erect or reflexed, ligulate-spathulate, obtuse, concave towards apex, 16–27 mm. long, 5.3–7.5 mm. wide; lateral sepals similar but suberect or reflexed, 16–25 mm. long, 5.3–7.5 mm. wide.
Morphology Reproductive morphology Flowers Corolla
Petals parallel to and covering column, elliptic, rounded at apex, 16–25.5 mm. long, 9.5–13.8 mm. wide.
Morphology Reproductive morphology Flowers Labellum
Lip 3-lobed, saccate at base, 16–25 mm. long, 10–16 mm. wide; side lobes elliptic, rounded; mid-lobe oblong or obovate, obtuse or rounded, undulate on margin; callus of 3 tall crenulate ridges, flexuous in front.
Morphology Reproductive morphology Flowers Column
Column 10–11 mm. long; foot 3–4 mm. long; anther-cap 2-horned at apex.
Morphology Reproductive morphology Fruits
Fruit pendent, 3–4.5 cm. long.
Figures
Pl. 2. Fig. 93/1–9.
Habitat
In marshes, swamps and seasonally flooded grasslands often by lakes and rivers; sea-level to 2300 m.
Distribution
throughout tropical and South Africa from the Gambia to Natal K3 K4 K5 K6 K7 T1 T4 T6 T7 T8 U1 U2 U3 U4
[FTEA]

General Description

Terrestrial herb 60–210 cm tall.Perennating organs fleshy, subterranean, rhizomatous, stout, cylindric, many-noded, branching, 1–5 cm in diameter, with white roots, 2 mm in diameter, emerging all over surface.Leaves 2–4, 50–140 × 0.7–4.3 cm, linear-lanceolate, acuminate, plicate, erect.Inflorescence laxly many-flowered, rarely 1-branched; peduncle stout, 1–2 cm in diameter, bearing 5 acute to acuminate sheaths; rhachis 16–40 cm long; bracts 1–2.5 cm long, ovate, lanceolate or oblanceolate.Pedicel and ovary 14–30 mm long.Flowers spreading or subnutant; sepals purple-brown or yellow; petals and lip yellow.Dorsal sepal 16–27 × 5.3–7.5 mm, erect or reflexed, ligulate-spathulate, obtuse, concave towards apex, lateral sepals similar but suberect or reflexed, 16–25 × 5.3–7.5 mm.Petals 16–25.5 × 9.5–13.8 mm, parallel to and covering column, elliptic, rounded at apex.Lip 16–25 × 10–16 mm, 3-lobed, saccate at base; side-lobes elliptic, rounded; mid-lobe oblong or obovate, obtuse or rounded, undulate on margin; callus of 3 tall crenulate ridges, flexuous in front.Column 10–11 mm long; foot 3–4 mm long; anther-cap 2-horned at apex.Fruit pendent 3–4.5 cm long.

A terrestrial herb 60–210 cm. tall. Perennating organs fleshy, subterranean, rhizomatous, stout, cylindric, many-noded, branching, 1–5 cm. diameter, with white, 2 mm. diameter roots emerging all over surface. Leaves 2–4, plicate, erect, linear-lanceolate, acuminate, 50–130 cm. long, 0.7–4.3 cm. wide. Inflorescence laxly many-flowered, rarely 1-branched; peduncle stout, 1–2 cm. diameter, bearing 5 acute to acuminate sheaths; rhachis 16–40 cm. long; bracts ovate, lanceolate or oblanceolate, 1–2.5 cm. long. Flowers spreading or subnutant; sepals purple-brown or yellow; petals and lip yellow; pedicel and ovary 14–21 mm. long. Dorsal sepal erect or reflexed, ligulate-spathulate, obtuse, concave towards apex, 16–27 mm. long, 5.3–7.5 mm. wide; lateral sepals similar but suberect or reflexed, 16–25 mm. long, 5.3–7.5 mm. wide. Petals parallel to and covering column, elliptic, rounded at apex, 16–25.5 mm. long, 9.5–13.8 mm. wide. Lip 3-lobed, saccate at base, 16–25 mm. long, 10–16 mm. wide; side lobes elliptic, rounded; mid-lobe oblong or obovate, obtuse or rounded, undulate on margin; callus of 3 tall crenulate ridges, flexuous in front. Column 10–11 mm. long; foot 3–4 mm. long; anther-cap 2-horned at apex. Fruit pendent, 3–4.5 cm. long. PI. 2. Fig. 93/1–9.

Habitat

In marshes, swamps and seasonally flooded grasslands often by lakes and rivers; sea-level to 2300 m.

Swampy grassland, swamp forest margins, stream banks and seasonally flooded dambos, often with long grasses

[E-EM]

Common Names

English
Yellow water orchid

Sources

  • Angiosperm Extinction Risk Predictions v1

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

  • Eulophiinae: e-monocot.org

    • All Rights Reserved
    • http://creativecommons.org/licenses/by-nc-sa/3.0/

  • Flora Zambesiaca

    • Flora Zambesiaca
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Flora of Tropical East Africa

    • Flora of Tropical East Africa
    • 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

    • '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

  • Plants and People Africa

    • Common Names from Plants and People Africa http://www.plantsandpeopleafrica.com/
    • © Plants and People Africa http://www.plantsandpeopleafrica.com http://creativecommons.org/licenses/by/3.0/