Bignoniaceae
Rhigozum

Rhigozum zambesiacum Baker

First published in Bull. Misc. Inform. Kew 1894: 32 (1894)
This species is accepted
The native range of this species is Mozambique to S. Africa. It is a shrub or tree and grows primarily in the subtropical biome.

Descriptions

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/168994303/169318197

Conservation
LC - least concern
[IUCN]

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]

Bignoniaceae, M. A. Diniz. Flora Zambesiaca 8:3. 1988

Morphology General Habit
Spiny shrub or small tree up to 4 m. tall (reaching 7 m. outside Flora Zambesiaca area), with rigid spreading branches with smooth greyish-brown bark, with shallow longitudinal ridges.
Morphology Leaves
Leaves 13–40 mm. long, (2) 3–5-jugate, very rarely 1-jugate, solitary or clustered in small almost glabrous cushions situated below the spines; petiole 4–9 mm. long; rhachis winged; leaflets 5–9 (14) × 3–4.5(6) mm., ovate, obovate, elliptic or rounded, sometimes emarginate at the apex, narrowly tapering or broadly acute at the base, margins entire, sessile.
Morphology Reproductive morphology Flowers
Flowers solitary or clustered on the cushions; pedicels 2–5 mm. long.
Morphology Reproductive morphology Flowers Calyx
Calyx 3–5 mm. long, subglabrous, 5-lobed, usually pilose at the apex.
Morphology Reproductive morphology Flowers Corolla
Corolla golden-yellow, with the tube 10–17 mm. long, glabrous lower cylindrical part slightly exceeding the calyx; lobes 8–13 mm., subcircular, crenulate, margin ciliate, puberulous on the inner surface at the sinuses, becoming glabrous at last.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens adnate up to c. 8 mm. from the base of the corolla tube; filaments c.5 mm. long; anthers 4–5.5 mm. long, slightly apiculate, exerted from the corolla tube.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary c. 2mm. long; style 11–17 mm. long.
Morphology Reproductive morphology Fruits
Capsule 3.5–8 × 1.2–2 cm. beaked, pale brown.
Morphology Reproductive morphology Seeds
Seeds 1–1.3 × 1.7–2.2 cm., including the wings.
[FZ]

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/

  • 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 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