Kew Bulletin

, 72:50 | Cite as

Ten new species and a new record for the genus Otholobium (Psoraleeae, Leguminosae) from South Africa

  • C. H. Stirton
  • A. M. Muasya


Ten new species of Otholobium from South Africa are described: O. accrescens C. H. Stirt. & Muasya, O. dreweae C. H. Stirt. & Muasya, O. lanceolatum C. H. Stirt. & Muasya, O. lucens C. H. Stirt. & Muasya, O. nitens C. H. Stirt. & Muasya, O. piliferum C. H. Stirt. & Muasya, O. prodiens C. H. Stirt. & Muasya, O. sabulosum C. H. Stirt. & Muasya, O. saxosum C. H. Stirt. & Muasya and O. spissum C. H. Stirt. & Muasya. One new record for South Africa is confirmed: O. foliosum (Oliv.) C. H. Stirt. subsp. gazense (Baker f.) Verdc. We provide conservation status assessments under the IUCN criteria and also adopt a scheme capturing various levels of rarity (Rabinowitz rarity code).

Key Words

conservation status Fabaceae Southern Africa taxonomy 



This research was funded over many years in part by: the Botanical Research Institute, Pretoria (South Africa, now SANBI); B. A. Krukoff Trust for Legume Research, Royal Botanic Gardens, Kew (U.K.); University of Natal (now University of KwaZulu-Natal), University of Cape Town; the Mellon Foundation; and the South African National Research Fund (NRF). We thank the Directors and staff of these organisations for their financial help and facilities, without which we would not have been able to do this work. The work is based in part on a Ph.D. by the first author at the University of Cape Town and subsequently on extensive fieldwork by both authors.

We are grateful to the Curators and staff of the following 35 herbaria (AA, BM, BOL, BRUX, CN, E, G, GRA, GRAZ, HER, ISC, K, L, LE, LINN, M, MEL, MO, NBG, NH, NU, NY, OXF, P, PRE, PRU, PRC, S, SAAS, SAM, STE, TUB, U, W, WAG) for the loan of their material.

Eight local collectors have been particularly helpful to us in resolving a number of critical species: Priscilla Drewe, Anne Bean, Jan Vlok, Mike Viviers, the late Tony Abbott, the late Ian Walters, and the late Ion and Sheila Williams. Without their help we would not have been able to see living material of as many of these rare species as we did. We are particularly grateful to the late Ellaphie Ward-Hilhorst and to Angela Beaumont (who prepared the majority of the line drawings in such an exacting and meticulous manner), the B.A. Krukoff Trust and the Royal Botanic Gardens, Kew for sponsoring the plates and for granting permission for them to be reproduced.

A number of people have been very helpful: the late Jana Žantovská for technical help, Brian Schrire, Gwilym Lewis, and the late Anthony Hall, for critical advice. We are also grateful to Priscilla Drewe and Tom Dunstan for photos of Otholobium thomii and O. dreweae and for sharing their observations of these species in the field. We are grateful to Jan & Annelies Vlok, Brian Schrire, Samson Chimphango, Meshak Dludlu, Simon Power, Oscar Dlodlo and the late Trevor Arnold, for help in the field.

This study was undertaken under a number of different permits from the Eastern Cape Parks Board; Cape Nature (AAA008-00035-0028; 029.2011: C. H. Stirton); Department of Environmental Affairs (K 135091); and the Provincial Administration of the Cape of Good Hope (102/1984; 222/1985; 323/1985; 72/1986). We are grateful to the various Environmental and conservation agencies for their permission to study material in situ on their properties.


  1. Baker, E. G. (1911). In: A. B. Rendle, E. G. Baker, S. Moore & A. Gepp, A contribution to our knowledge of the Flora of Gazaland: being an account of collections made by C. F. M. Swynnerton Esq., F.L.S. J. Linn. Soc., Bot. 40: 1 – 245.Google Scholar
  2. Bohnen, P. (1986). Flowering plants of the Southern Cape. Still Bay Trust.Google Scholar
  3. Dludlu, M., Stirton, C. H., Chimphango, S. B. M., Bello, A. & Muasya, A. M. (2013). Phylogenetic position of the southern African members of the tribe Psoraleeae based on molecular and morphological data. S. African J. Bot. 89: 150 – 155.CrossRefGoogle Scholar
  4. Egan, A. N. & Crandall, K. A. (2008). Incorporating gaps as phylogenetic characters across eight DNA regions: Ramifications for North American Psoraleeae (Leguminosae). Molec. Phylogenet. Evol. 46: 532 – 546.CrossRefPubMedGoogle Scholar
  5. Goldblatt, P. & Manning, J. (2000). Cape Plants: A Conspectus of the Cape Flora of South Africa. Strelitzia 9. National Botanical Institute, Pretoria.Google Scholar
  6. Grimes, J. W. (1990). A revision of the New World species of Psoraleeae (Leguminosae: Papilionoideae). Mem. New York Bot. Gard. 61: 1 – 113.Google Scholar
  7. IUCN (2001). IUCN Red List Categories and Criteria. Version 3.1. IUCN, Gland & Cambridge.Google Scholar
  8. Karron, J. D. (1987). A comparison of levels of genetic polymorphism and self-compatibility in geographically restricted and widespread plant congeners. Evol. Ecol. 1: 47 – 58.CrossRefGoogle Scholar
  9. Larsen, R., Holmern, T., Prager, S. D., Maliti, H. & Røskaft, E. (2009). Using the extended quarter degree grid cell system to unify mapping and sharing of biodiversity data. Afr. J. Ecol. 47: 382 – 392.CrossRefGoogle Scholar
  10. Leistner, O. A. & Morris, J. W. (1976). Southern African place names. Ann. Cape Prov. Mus. Nat. Hist. 12: 1 – 565.Google Scholar
  11. Manning, J. & Goldblatt, P. (2012). Plants of the Greater Cape Floristic Region 1: the Core. Strelitzia 29. South African National Biodiversity Institute, Pretoria.Google Scholar
  12. Mucina, L. & Rutherford, M. C. (eds). (2006). Vegetation map of South Africa, Lesotho and Swaziland. Strelitzia 19. South African National Biodiversity Institute, Pretoria.Google Scholar
  13. Ojeda, I., Francisco-Ortega, J. & Cronk, Q. C. B. (2009). Evolution of petal epidermal micromorphology in Leguminosae and its use as a marker of petal identity. Ann. Bot. 104: 1099 – 1110.CrossRefPubMedPubMedCentralGoogle Scholar
  14. Rabinowitz, D. (1981). Seven forms of rarity. In: H. Synge (ed.), The Biological Aspects of Rare Plant Conservation, pp. 205 – 217. Wiley Interscience, Chichester.Google Scholar
  15. Raimondo, D., von Staden, L., Foden, W., Victor, J. E., Helme, N. A., Turner, R. C., Kamundi, D. A. & Manyama, P. A. (2009). Red List of South African Plants. Strelitzia 25. South African National Biodiversity Institute, Pretoria.Google Scholar
  16. Stirton, C. H. (1981a). Psoraleeae. In: R. M. Polhill & P. H. Raven (eds), Advances in Legumes Systematics, Part 1: 337 – 343. Royal Botanic Gardens, Kew.Google Scholar
  17. ____ (1981b). Studies in the Leguminosae-Papilionoideae of southern Africa. Bothalia 13: 317 – 325.Google Scholar
  18. ____ (1982). A new species of Otholobium in South Africa. Bothalia. 14: 72 – 73.Google Scholar
  19. ____ (1983). Two new species of Otholobium (Fabaceae). J. S. African Bot. 49: 337 – 342.Google Scholar
  20. ____ (1986). Notes on the genus Otholobium (Papilionoideae, Fabaceae). S. African J. Bot. 52: 1 – 6.CrossRefGoogle Scholar
  21. ____ (1989). A revision of the genus Otholobium C. H. Stirt. (Psoraleeae, Leguminosae). Unpublished Ph.D. Dissertation, University of Cape Town.Google Scholar
  22. ____ (1991). Notes on the genus Otholobium (Psoraleeae, Fabaceae). 5. Four new species from Namaqualand, South Africa. S. African J. Bot. 57: 123 – 127.Google Scholar
  23. ____ (2005). Tribe Psoraleeae. In: G. Lewis, B. Schrire, B. Mackinder & M. Lock (eds), Legumes of the world, pp. 447 – 451. Royal Botanic Gardens, Kew.Google Scholar
  24. Verdcout, B. (2000). In: G. V. Pope, Flora Zambesiaca Vol. 3 Part 6. Leguminosae. Royal Botanic Gardens, Kew for the Flora Zambesiaca Managing Committee.Google Scholar
  25. von Staden, L., Raimondo, D. & Foden, W. (2009). Approach to Red List Assessments. In: D. Raimondo, L. von Staden, W. Foden, J. E. Victor, N. A. Helme, R. C. Turner, D. A. Kamundi & P. A. Manyama (eds), Red List of South African Plants. Strelitzia 25. South African National Biodiversity Institute, Pretoria.Google Scholar

Copyright information

© The Board of Trustees of the Royal Botanic Gardens, Kew 2017

Authors and Affiliations

  1. 1.Bolus Herbarium, Department of Biological SciencesUniversity of Cape TownRondeboschSouth Africa

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