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Issue: Vol. 726 No. 3: 4 Nov. 2025
Type: Article
Published: 2025-11-04
DOI: 10.11646/phytotaxa.726.3.3
Page range: 155-164
Abstract views: 112
PDF downloaded: 135

Premna sebrabergensis (Lamiaceae, Premnoideae), a new species from Angola and Namibia

Independent Researcher, P.O. Box 21168, Windhoek, Namibia, H.G.W.J. Schweickerdt Herbarium, Department of Plant and Soil Sciences, University of Pretoria, Pretoria, 0002 South Africa, Ongava Research Centre, Private Bag 12041, Windhoek, Namibia
Babylonstoren Farm, Simondium, Western Cape, 7670 South Africa, University of the Western Cape, Private Bag X17, Bellville, 7535 South Africa
Ongava Research Centre, Private Bag 12041, Windhoek, Namibia
H.G.W.J. Schweickerdt Herbarium, Department of Plant and Soil Sciences, University of Pretoria, Pretoria, 0002 South Africa, South African National Biodiversity Institute, Private Bag X101, Pretoria, 0001 South Africa
Eudicots anorthosite Cunene Province Pondoland Centre of Endemism flora Kaokoveld Centre of Endemism Kunene Region taxonomy ultramafic rocks Zebra Mountains

Abstract

Premna sebrabergensis, hitherto misidentified in herbaria as Volkameria glabra (= Clerodendrum glabrum), is here described as a new species. It is a range-restricted species, only known from the Zebra Mountains in the Kaokoveld Centre of Endemism, in northwestern Namibia and southwestern Angola. It grows primarily in soils derived from anorthosite and gabbro of the Kunene Igneous Complex. Diagnostic characters for P. sebrabergensis include the pale green or yellow-green appearance of the plants, vegetative parts with an indumentum of simple antrorse-directed white trichomes and yellow glandular peltate scales, leaves usually ovate, often with elongated acuminate apex and flowers in paniculately arranged cymes. Based on IUCN Red List criteria, a provisional conservation assessment of Endangered (EN) is recommended for the new species.

References

  1. Adhikari, S., Marcelo Silva, J., Rajakaruna, N. & Siebert, S.J. (2022) Influence of land use and topography on distribution and bioaccumulation of potentially toxic metals in soil and plant leaves: a case study from Sekhukhuneland, South Africa. Science of the Total Environment 806: 150659. https://doi.org/10.1016/j.scitotenv.2021.150659
  2. Atlas of Namibia Team (2022) Atlas of Namibia: its land, water and life. Namibia Nature Foundation, Windhoek, 390 pp.
  3. Bachman, S., Moat, J., Hill, A.W., De la Torre, J. & Scott, B. (2011) Supporting Red List threat assessments with GeoCAT: geospatial conservation assessment tool. ZooKeys 150: 117–126. https://doi.org/10.3897/zookeys.150.2109
  4. Beentje, H. (2016) The Kew plant glossary: an illustrated dictionary of plant terms, 2nd ed. Kew Publishing, Kew, 184 pp.
  5. Ben Mahmoud, K., Mezzapesa, G.N., Abdelkefi, F. & Perrino, E.V. (2024) Nutritional value and functional properties of an underexploited Tunisian wild beet (Beta macrocarpa Guss.) in relation to soil characteristics. Euro-Mediterranean Journal for Environmental Integration 9: 705–720. https://doi.org/10.1007/s41207-024-00468-5
  6. Christenhusz, M.J.M., Fay, M.F. & Chase, M.W. (2017) Plants of the world: an illustrated encyclopedia of vascular plants. Kew Publishing, Kew and The University of Chicago Press, Chicago, 792 pp. https://doi.org/10.7208/chicago/9780226536705.001.0001
  7. Edwards, D. & Leistner, O.A. (1971) A degree reference system for citing biological records in southern Africa. Mitteilungen der Botanischen Staatssammlung München 10: 501–509. [https://biostor.org/reference/185348]
  8. Figueiredo, E. & Smith, G.F. (2008) Plants of Angola/Plantas de Angola. Strelitzia 22. South African National Biodiversity Institute, Pretoria, 279 pp. [https://www.sanbi.org/documents/plants-of-angola-strelitzia-22/]
  9. Germishuizen, G. & Meyer, N.L. (Eds) (2003) Plants of southern Africa: an annotated checklist. Strelitzia 14. National Botanical Institute, Pretoria, 1231 pp.
  10. Gürke, M. (1893) Verbenaceae africanae. In: Engler, A. (Ed.) Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 18 (1 & 2): 165–183. [https://www.biodiversitylibrary.org/page/203151]
  11. Gürke, M. (1903) Verbenaceae africanae. In: Engler, A. (Ed.) Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 33 (2): 292–300. [https://www.biodiversitylibrary.org/page/213101]
  12. Hewson, H.J. (2019) Plant indumentum: a handbook of terminology, revised ed. Australian Biological Resources Study, Commonwealth Department of the Environment and Energy, Australia, 47 pp.
  13. Hiern, W.P. (1900) Verbenaceae. Catalogue of the African plants collected by Dr. Friedrich Welwitsch in 1853–1861 1 (4): 827–847. [https://www.biodiversitylibrary.org/page/11447149]
  14. IUCN. (2012) IUCN red list categories and criteria: Version 3.1. 2nd edn. Gland, Switzerland and Cambridge U.K., iv + 32 pp. [https://portals.iucn.org/library/node/10315]
  15. IUCN Standards and Petitions Committee. (2024) Guidelines for Using the IUCN Red List Categories and Criteria. Version 16. Prepared by the Standards and Petitions Committee. [https://www.iucnredlist.org/documents/RedListGuidelines.pdf]
  16. Klotzsch, F. (1861) Nuculiferae Endlicher. In: Peters, W.C.H. (Ed.) Naturwissenschaftliche reise nach Mossambique: auf befehl seiner majestät des königs Friedrich Wilhelm IV, in den jahren 1842 bis 1848. 6 (1). Wilhelm C.H. Peters, Berlin, pp. 247–266. [https://www.biodiversitylibrary.org/page/36335691#page/250/mode/1up]
  17. Linnaeus, C. (1771) Mantissa Plantarum Altera. Generum editionis VI & specierum editionis II. Laurentii Salvii, Holmiae [Stockholm], 588 pp. https://doi.org/10.5962/bhl.title.11980
  18. Maier, W.D., Rasmussen, B., Fletcher, I.R., Li, C., Barnes, S.J. & Huhma, H. (2013) The Kunene Anorthosite Complex, Namibia, and its satellite intrusions: geochemistry, geochronology, and economic potential. Economic Geology 108 (5): 953–986. https://doi.org/10.2113/econgeo.108.5.953
  19. Meyer, E.H.F. (1838) Commentariorum de plantis Africae Australioris:quas per octo annos collegit observationibusque manuscriptis. Leopoldum Voss, Leipzig, 326 pp. [https://www.biodiversitylibrary.org/item/162#page/349/mode/1up]
  20. Miller, R. McG. & Schalk, K.E.L. (1980) Geological map of South West Africa/Namibia (1: 1000000). Geological Survey of the Republic of South Africa and South West Africa/Namibia, Windhoek, 4 sheets.
  21. Moldenke, H.N. (1953) Notes on new and noteworthy plants 15. Phytologia 4 (3): 173–184. [https://www.biodiversitylibrary.org/page/13054607]
  22. Perrino, E.V., Wagensommer, R.P., Mezzapesa, G.N. & Trani A. (2024) Stachys italica Mill.: synecology, functional compounds and potential use of an Italian endemic taxon. Planta 260: 138. https://doi.org/10.1007/s00425-024-04571-3
  23. POWO. (2025) Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Available from: http://powo.science.kew.org/ (accessed 2 June 2025)
  24. Satthaphorn, J., Paton, A.J., Sutthinon, P. & Leeratiwong, C. (2025) Endocarp morphology of Premna (Lamiaceae) in Thailand and its taxonomic significance. Plants 14 (11): 1706. https://doi.org/10.3390/plants14111706
  25. Siebert, S.J., Van Wyk, A.E. & Bredenkamp, G.J. (2001) Endemism in the flora of ultramafic areas of Sekhukhuneland, South Africa. South African Journal of Science 97: 529–532. [https://journals.co.za/doi/abs/10.10520/EJC97254]
  26. Swanepoel, W. (2015) Maerua sebrabergensis (Capparaceae), a new species from Namibia. Phytotaxa 207 (1): 123–128. https://doi.org/10.11646/phytotaxa.207.1.7
  27. Swanepoel, W. & Van Jaarsveld, E.J. (2019) Ocimum sebrabergensis (Lamiaceae), a new species from Namibia. Phytotaxa 405 (4): 203–209. https://doi.org/10.11646/phytotaxa.405.4.4
  28. Thiers, B. (2025) Index Herbariorum: A global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from: http://sweetgum.nybg.org/ih/ (accessed May 2025)
  29. Van Jaarsveld, E.J., Swanepoel, W. & Visagie, M. (2021) Carissa sebrabergensis. Flowering Plants of Africa 67: 150–157.
  30. Van Wyk, A.E. & Smith, G.F. (2001) Regions of floristic endemism in southern Africa: a review with emphasis on succulents. Umdaus Press, Hatfield, Pretoria, 199 pp.
  31. Yuan, Y.-W., Mabberley, D.J., Steane, D.A. & Olmstead, R.G. (2010) Further disintegration and redefinition of Clerodendrum (Lamiaceae): implications for the understanding of the evolution of an intriguing breeding strategy. Taxon 59 (1): 125–133. https://doi.org/10.1002/tax.591013

How to Cite

Swanepoel, W., van Jaarsveld, E.J., Becker, R.W. & van Wyk, A.E. (2025) Premna sebrabergensis (Lamiaceae, Premnoideae), a new species from Angola and Namibia. Phytotaxa 726 (3): 155–164. https://doi.org/10.11646/phytotaxa.726.3.3