1. Jodamus, N. (2001); Kirstenbosch; www.plantzafrica.com
2. Adams, T. (2001); Kirstenbosch; www.plantzafrica.com
3. Singh, Y. (2005); KwaZulu-Natal Herbarium; www.plantzafrica.com
4. Jamieson, H.G. (2001); Kirstenbosch Botanical Garden; www.plantzafrica.com
5. Notten, A. (2003); Kirstenbosch National Botanical Garden; www.plantzafrica.com
6. Forrester, J. (2009); Harold Porter National Botanical Garden; www.plantzafrica.com
7. Conservation International (Lead Author);J. Emmett Duffy (Topic Editor) "Biological diversity in the Cape Floristic Region". In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth August 22, 2008; Last revised Date August 22, 2008; Retrieved May 9, 2013 http://www.eoearth.org/article/Biological_diversity_in_the_Cape_Floristic_Region
8. World Wildlife Fund (Lead Author);C Michael Hogan (Contributing Author);Mark McGinley (Topic Editor) "Southern Africa bushveld". In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth March 17, 2007; Last revised Date February 1, 2013; Retrieved May 9, 2013 http://www.eoearth.org/article/Southern_Africa_bushveld?topic=49597
9. World Wildlife Fund (Lead Author);C Michael Hogan (Contributing Author);Mark McGinley (Topic Editor) "Nama Karoo". In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth August 20, 2008; Last revised Date February 18, 2013; Retrieved May 9, 2013 http://www.eoearth.org/article/Nama_Karoo?topic=49597
10. Conservation International (Lead Author);C Michael Hogan (Contributing Author);Mark McGinley (Topic Editor) "Biological diversity in the Succulent Karoo". In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth August 22, 2008; Last revised Date April 19, 2011; Retrieved May 9, 2013 http://www.eoearth.org/article/Biological_diversity_in_the_Succulent_Karoo
11. Essential Illustrated Wildlife Guide to Southern Africa; Sunbird Publishers (2010)
12. Manning, J. (2009); Field Guide to Wild Flowers of South Africa; Struik Nature Publishers
13. Van Oudtshoorn, F. (2012); Guide to Grasses of Southern Africa; Briza Publications
14. www.savetheflamingo.co.za
15. Voigt, W. and Pekeur, O. (2013); Kirstenbosch National Botanical Garden; www.plantzafrica.com
16. Olivier, I. and Reynolds, Y. (2002); Karoo Desert National Botanical Gardens; www.plantzafrica.com
17. Olivier, I. (2005); Karoo Desert National Botanical Gardens; www.plantzafrica.com
18. Welman, M. (2011); Pretoria National Herbarium; www.plantzafrica.com
19. Mazibuko, N. (2007); KwaZulu-Natal Herbarium; www.plantzafrica.com
20. Lithudzho, E. (2005); Pretoria National Botanical Garden; www.plantzafrica.com
2. Adams, T. (2001); Kirstenbosch; www.plantzafrica.com
3. Singh, Y. (2005); KwaZulu-Natal Herbarium; www.plantzafrica.com
4. Jamieson, H.G. (2001); Kirstenbosch Botanical Garden; www.plantzafrica.com
5. Notten, A. (2003); Kirstenbosch National Botanical Garden; www.plantzafrica.com
6. Forrester, J. (2009); Harold Porter National Botanical Garden; www.plantzafrica.com
7. Conservation International (Lead Author);J. Emmett Duffy (Topic Editor) "Biological diversity in the Cape Floristic Region". In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth August 22, 2008; Last revised Date August 22, 2008; Retrieved May 9, 2013 http://www.eoearth.org/article/Biological_diversity_in_the_Cape_Floristic_Region
8. World Wildlife Fund (Lead Author);C Michael Hogan (Contributing Author);Mark McGinley (Topic Editor) "Southern Africa bushveld". In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth March 17, 2007; Last revised Date February 1, 2013; Retrieved May 9, 2013 http://www.eoearth.org/article/Southern_Africa_bushveld?topic=49597
9. World Wildlife Fund (Lead Author);C Michael Hogan (Contributing Author);Mark McGinley (Topic Editor) "Nama Karoo". In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth August 20, 2008; Last revised Date February 18, 2013; Retrieved May 9, 2013 http://www.eoearth.org/article/Nama_Karoo?topic=49597
10. Conservation International (Lead Author);C Michael Hogan (Contributing Author);Mark McGinley (Topic Editor) "Biological diversity in the Succulent Karoo". In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth August 22, 2008; Last revised Date April 19, 2011; Retrieved May 9, 2013 http://www.eoearth.org/article/Biological_diversity_in_the_Succulent_Karoo
11. Essential Illustrated Wildlife Guide to Southern Africa; Sunbird Publishers (2010)
12. Manning, J. (2009); Field Guide to Wild Flowers of South Africa; Struik Nature Publishers
13. Van Oudtshoorn, F. (2012); Guide to Grasses of Southern Africa; Briza Publications
14. www.savetheflamingo.co.za
15. Voigt, W. and Pekeur, O. (2013); Kirstenbosch National Botanical Garden; www.plantzafrica.com
16. Olivier, I. and Reynolds, Y. (2002); Karoo Desert National Botanical Gardens; www.plantzafrica.com
17. Olivier, I. (2005); Karoo Desert National Botanical Gardens; www.plantzafrica.com
18. Welman, M. (2011); Pretoria National Herbarium; www.plantzafrica.com
19. Mazibuko, N. (2007); KwaZulu-Natal Herbarium; www.plantzafrica.com
20. Lithudzho, E. (2005); Pretoria National Botanical Garden; www.plantzafrica.com