A narrative review of the nutritional, medicinal, and ethnopharmacological properties of Grewia flava DC. (Malvaceae family).

Alfred Maroyi

doi:10.51168/3c51rb96

Autori

Alfred Maroyi Department of Biotechnology and Biological Sciences, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa.

DOI:

https://doi.org/10.51168/3c51rb96

Cuvinte cheie:

Indigenous knowledge systems, Malvaceae, materia medica, southern Africa, Tiliaceae

Rezumat

Grewia flava DC., commonly known as “velvet raisin” in southern Africa, is a wild plant species with high socio-economic potential. Its fruits are edible, and various organs of G. flava are used in traditional medicine. This study was undertaken aimed at reviewing nutritional, medicinal, and ethnopharmacological properties of G. flava. This study is based on literature obtained from scientific databases such as SpringerLink, PubMed, Scopus, Web of Science, Google Scholar, ScienceDirect, and SciELO, as well as literature obtained from pre-electronic sources such as books, book chapters, and other scientific publications obtained from the university library. This research showed that the fruit flesh and skin of G. flava are a good source of energy, classic nutrients, and minerals. The bark, fruits, leaves, roots, stems, and stem bark of G. flava are used as charm and ethnoveterinary medicine, and traditional medicine for sexually transmitted infections, burns, cough, diarrhoea, kidney problems, stomach problems, and tuberculosis. The species is characterized by alkaloids, flavonoids, phenols, saponins, glycosides, steroids, anthraquinones, fatty acids, fatty acid esters, terpenoids, tannins, and reducing sugars. The crude extracts of leaves, fruits, bark, roots, and twigs of G. flava and phytochemical compounds isolated from the species demonstrated antibacterial, antifungal, anti-inflammatory, antioxidant, antiparasitic, and cytotoxic activities. Future research involving G. flava should focus on detailed nutritional, phytochemical, pharmacological, and toxicological evaluations of the species.

Biografie autor

Alfred Maroyi, Department of Biotechnology and Biological Sciences, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa.

is a Professor of Botany in the Department of Biotechnology and Biological Sciences, University of Fort Hare

Referințe

1. Angiosperm Phylogeny Group (APG III). (2009). An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III. Botanical Journal of the Linnean Society, 161, 105-121. https://doi.org/10.1111/j.1095-8339.2009.00996.x

2. Anaemene, B. (2018). Health and diseases in Africa. In: Akanle, O., Adésìnà, J. (editors). The development of Africa: Social indicators research series volume 71. Springer, Cham, pp. 207-226. https://doi.org/10.1007/978-3-319-66242-8_12

3. Arnold, T.H., Prentice, C.A., Hawker, L.C., Snyman, E.E., Tomalin, M., Crouch, N.R., and Pottas-Bircher, C. (2002). Medicinal and magical plants of southern Africa: An annotated checklist. National Botanical Institute, Strelitzia 13, Pretoria.

4. Asong, J.A., Ndhlovu, P.T., Khosana, N.S., Aremu, A.O., and Otang-Mbeng, W. (2019). Medicinal plants used for skin-related diseases among the Batswanas in Ngaka Modiri Molema District Municipality, South Africa. South African Journal of Botany, 126, 11-20. https://doi.org/10.1016/j.sajb.2019.05.002

5. Badimo, D., Lepetu, J., and Teketay, D. (2015). Utilization of edible wild plants and their contribution to household income in Gweta village, central Botswana. African Journal of Food Science and Technology, 6, 220-228. https://doi.org/10.14303/ajfst.2015.074

6. Barry, A., Impouma, B., Wolfe, C.M., Campos, A., Richards, N.C., Kalu, A., Diallo, C.B., Barango, P., and Farham, B. (2025). Non-communicable diseases in the WHO African region: Analysis of risk factors, mortality, and responses based on WHO data. Scientific Reports, 15, 12288. https://doi.org/10.1038/s41598-025-97180-3

7. Bayer, C., and Kubitzki, K. (2003). Malvaceae. In: Kubitzki, K., and Bayer, C. (editors). Flowering plants, dicotyledons. Springer-Verlag, Berlin, pp. 225-311. https://doi.org/10.1007/978-3-662-07255-4_28

8. Bolten, C. (1998). Healing knowledge and cultural practices in a modern Tswana Village. BSc Honours Dissertation, Williams College, Williamstown, Massachusetts.

9. Boon, R. (2010). Pooley's trees of eastern South Africa. Flora and Fauna Publications Trust, Durban.

10. Bultosa, G., Molapisi, M., Tselaesele, N., Kobue-Lekalake, R., Desse Haki, G., Makhabu, S., Sekwati-Monang, B., Seifu, E., and Nthoiwa, G. (2020). Plant-based traditional foods and beverages of Ramotswa Village, Botswana. Journal of Ethnic Foods, 7, https://doi.org/10.1186/s42779-019-0041-3

11. Chakale, M.V., Asong, J.A., Struwig, M., Mwanza, M., and Aremu, A.O. (2022). Ethnoveterinary practices and ethnobotanical knowledge on plants used against cattle diseases among two communities in South Africa. Plants, 11, 1784. https://doi.org/10.3390/plants11131784

12. Chakale, M.V., Mwanza, M., and Aremu, A.O. (2021). Ethnoveterinary knowledge and biological evaluation of plants used for mitigating cattle diseases: A critical insight into the trends and patterns in South Africa. Frontiers in Veterinary Science, 8, 710884. https://doi.org/10.3389/fvets.2021.710884

13. Chakale, M.V., Lekhooa, M., and Aremu, A.O. (2024). South African medicinal plants used for health conditions affecting males: an ethnobotanical review. Journal of Herbal Medicine, 47, 100931. https://doi.org/10.1016/j.hermed.2024.100931

14. Chakale, M.V., Mooki, O., Nko, K.I., Sedupane, G., and Aremu, A.O. (2025). Batswana ethnobotany: An appraisal of the uses of botanicals for diverse purposes among local communities in Botswana and South Africa. South African Journal of Botany, 184, 1010-1050. https://doi.org/10.1016/j.sajb.2025.06.040

15. Chinsembu, K.C., and Hedimbi, M. (2010). An ethnobotanical survey of plants used to manage HIV/AIDS opportunistic infections in Katima Mulilo, Caprivi Region, Namibia. Journal of Ethnobiology and Ethnomedicine, 6, 25. https://doi.org/10.1186/1746-4269-6-25

16. Christenhusz, M.J.M., and Byng, J.W. (2016). The number of known plant species in the world and its annual increase. Phytotaxa, 261(3), 201-217. https://doi.org/10.11646/phytotaxa.261.3.1

17. Coin, G., Lekutlane, D., Masisi, K., Muzila, M., and Mazimba, O. (2024). Grewia flava twig extracts: phytochemical, antioxidant, and antimicrobial evaluations. Bulletin of the National Research Centre, 48, 75. https://doi.org/10.1186/s42269-024-01234-x

18. Dlamini, B. (1981). Swaziland flora: Their local names and uses. Ministry of Agriculture and Cooperatives: Forestry section, Mbabane.

19. Drummond, R.B. (1975). A list of trees, shrubs and woody climbers indigenous or naturalized in Rhodesia. Kirkia, 10(1), 229-286.

20. Festus, B. (2019). Grewia flava DC. Kirstenbosch National Botanical Garden. Available at: https://pza.sanbi.org/grewia-flava, accessed on 12 July 2026.

21. Germishuizen, G., and Meyer, N.L. (2003). Plants of southern Africa: An annotated checklist. Strelitzia 14, National Botanical Institute, Pretoria.

22. Ghanbari, S., Weiss, G., Liu, J., Eastin, I., Fathizadeh, O., and Moradi, G. (2022). Potentials and opportunities of wild edible forest fruits for rural households' economy in Arasbaran, Iran. Forests, 13(3), 453. https://doi.org/10.3390/f13030453

23. Gololo, S.S., Shai, L.J., Agyei, N.M., and Mogale, M.A. (2016a). Effect of seasonal changes on the quantity of phytochemicals in the leaves of three medicinal plants from Limpopo province, South Africa. Journal of Pharmacognosy and Phytotherapy, 8(9), 168-172. doi: 10.5897/JPP2016.0408.

24. Gololo, S.S., Mogale, M.A., Agyei, N.M., and Shai, L.J. (2016b). Phytochemical, antioxidant and antibacterial screening of the leaves of Barleria dinteri (Oberm), Grewia flava (DC) and Jatropha lagarinthoides (Sond). Journal of Chemical and Pharmaceutical Research, 8(10), 56-60.

25. Gololo, S.S., Mogale, M.A., Shai, L.J., Agyei, N.M., and Masoko, P. (2017). Effect of concoction extraction of the leaves of Barleria dinteri (Oberm), Grewia flava (DC), and Jatropha lagarinthoides (Sond) on inherent antioxidant and antibacterial activities. Research Journal of Medicinal Plants, 11(1), 14-18. https://doi.org/10.3923/rjmp.2017.14.18

26. Gomes, D.L., dos Ferreira, R.P.S., dos Santos, É.M.C., da Silva, R.R.V., and de Medeiros, P.M. (2020). Local criteria for the selection of wild food plants for consumption and sale in Alagoas, Brazil. Ethnobiology and Conservation, 9(10), 1-15. https://doi.org/10.15451/ec2020-04-9.10-1-15

27. Gwedla, N., De Beer, S., Seshoka, D., and Cilliers, S.S. (2025). The use of indigenous plants in home and health clinic gardens to engender urban rewilding in the urban and peri-urban areas of the North-West Province, South Africa. Cities and the Environment, 18(1), 9. https://doi.org/10.15365/1932-7048.1393

28. Hedberg, I., and Staugård, F. (1989). Traditional medicine in Botswana: Traditional medicinal plants. Ipeleng Publishers, Gaborone.

29. Heywood, V.H., Brummitt, R.K., Culham, M.A., and Seberg, R.G.O. (2007). Flowering plant families of the world. Firefly Books Ltd., Ontario.

30. Hyde, M.A., Wursten, B.T., Ballings, P., and Palgrave, C.M. (2026). Flora of Zimbabwe: Species information: Grewia flava DC. Available at: https://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=138430, accessed on 17 August 2026.

31. Karimi, N., and Hanes, M.M. (2024). Patterns of Grewia (Malvaceae) diversity across geographical scales in Africa and Madagascar. Annals of Botany, 133, 773-788. https://doi.org/10.1093/aob/mcae009

32. Khunoana, E.T., and McGaw, L.J. (2020). Ethnoveterinary medicinal plants used in South Africa. In: Abdalla, M.A., and McGaw, L.J. (editors). Ethnoveterinary medicine: Present and future concepts. Springer, Cham, pp. 211-250. https://doi.org/10.1007/978-3-030-32270-0_10

33. Koloka, O., and Moreki, J.C. (2011). Tanning hides and skins using vegetable tanning agents in Hukuntsi sub-district, Botswana. Journal of Agricultural Technology, 7(4), 915-922.

34. Lamola, S.M., Dzoyem, J.P., Botha, F., and Van Wyk, C. (2017). Antibacterial, free radical scavenging activity, and cytotoxicity of acetone extracts of Grewia flava. African Health Sciences, 17(3), 790-796. https://doi.org/10.4314/ahs.v17i3.22

35. Leffers, A. (2003). Gemsbok bean and Kalahari truffle. Gamsberg Macmillan, Windhoek.

36. Leistner, O.A. (2000). Seed plants of southern Africa: Families and genera. Strelitzia 10, National Botanical Institute, Pretoria.

37. Mainah, J. (2006). Socio-economic importance of Grewia flava to the people of Western parts of Kweneng district and factors affecting its spatial distribution in Botswana. Botswana Notes and Records, 38, 11-19.

38. Majinda, R.R.T., and Motswaledi, M.S. (1998). Antibiotic activity of selected Botswana Medicinal plants. Botswana Notes and Records, 30, 157-161.

39. Malan, J.S., and Owen-Smith, G.L. (1974). The ethnobotany of Kaokoland. Cimbebasia, 2, 131-178.

40. Mannheimer, C.A., and Curtis, B.A. (2009). Le Roux and Müller's field guide to the trees and shrubs of Namibia. Macmillan Education Namibia, Windhoek.

41. Mapaura, A., and Timberlake, J. (2004). A checklist of Zimbabwean vascular plants. Southern African Botanical Diversity Network Report No. 33, SABONET, Pretoria.

42. Maroyi, A. (2026). Phytochemistry and pharmacological properties of medicinal plants. Plants, 15, 1220. https://doi.org/10.3390/plants15081220

43. Mashungwa, N.G., Mogotsi, K.K., and Amosso, C. (2019). Grewia flava. In: Ulian, T., Flores, C., Lira, R., Mamatsharaga, A., Mogotsi, K.K., Muthoka, P., Ngwako, S., Nyamongo, D.O., Omondi, W., Sanogo, A.K., Sanogo, S., and Mattana, E. (editors). Wild plants for a sustainable future: 110 multipurpose species. Royal Botanic Gardens, Kew, Richmond, pp. 32-34.

44. Masisi, K., Masamba, R., Lashani, K., Li, C., Kwape, T.E., and Gaobotse, G. (2021). Antioxidant, cytotoxicity, and cytoprotective potential of extracts of Grewia flava and Grewia bicolor berries. Journal of Pharmacopuncture, 24(1), 24-31. https://doi.org/10.3831/KPI.2021.24.1.24

45. Matlala, M.E., Lubisi, N.P., Chauke, S., Kola, E., Ramarumo, L.J., and Ndhlovu, P.T. (2025). Plant species used to treat various ailments of the North-West Province, South Africa: A systematic review. Next Research, 2, 100446. https://doi.org/10.1016/j.nexres.2025.100446

46. McGaw, L.J., and Eloff, J.N. (2008). Ethnoveterinary use of southern African plants and scientific evaluation of their medicinal properties. Journal of Ethnopharmacology, 119, 559-574. https://doi.org/10.1016/j.jep.2008.06.013

47. McGaw, L.J., Famuyide, I.M., Khunoana, E.T., and Aremu, A.O. (2020). Ethnoveterinary botanical medicine in South Africa: A review of research from the last decade (2009 to 2019). Journal of Ethnopharmacology, 257, 112864. https://doi.org/10.1016/j.jep.2020.112864

48. Mmopelwa, G., Blignaut, J.N., and Hassan, R. (2009). Direct use values of selected vegetation resources in the Okavango Delta wetland. South African Journal of Economic and Management Sciences, 12(2), a279. https://doi.org/10.4102/sajems.v12i2.279

49. Mogale, M.M.P., Raimondo, D., and Van Wyk, B.-E. (2019). The ethnobotany of Central Sekhukhuneland, South Africa. South African Journal of Botany, 122, 90-119. https://doi.org/10.1016/j.sajb.2019.01.001

50. Molapisi, M.,·Tselaesele, N.,·Makhabu, S.,·Bultosa, G.,·Haki, G.D., Kobue Lekalake, R.,·Sekwati Monang, B.,·Seifu, E., and Phakama, T. (2024). Plant based traditional foods of Mogoditshane, Mmopane and Metsimotlhabe villages, Botswana: Nutritional and bioactive compounds potential, processing, values, and challenges. Discover Food, 4, 81. https://doi.org/10.1007/s44187-024-00164-x

51. Molebatsi, L.Y., Siebert, S.J., Cilliers, S.S., Lubbe, C.S., and Davoren, E. (2011). The Tswana tshimo: A homegarden system of useful plants with a particular layout and function. African Journal of Agricultural Research, 5(21), 2952-2963.

52. Mongalo, N.I., and Makhafola, T.J. (2018). Ethnobotanical knowledge of the lay people of Blouberg area (Pedi tribe), Limpopo Province, South Africa. Journal of Ethnobiology and Ethnomedicine, 14, 46. https://doi.org/10.1186/s13002-018-0245-4

53. Mongalo, N.I., and Raletsena, M.V. (2022). An inventory of South African medicinal plants used in the management of sexually transmitted and related opportunistic infections: An appraisal and some scientific evidence (1990-2020). Plants, 11, 3241. https://doi.org/10.3390/plants11233241

54. Mongalo, N.I., McGaw, L.J., Finnie, J.F., and Van Staden, J. (2017). Pharmacological properties of extracts from six South African medicinal plants used to treat sexually transmitted infections (STIs) and related infections. South African Journal of Botany, 112, 290-295. https://doi.org/10.1016/j.sajb.2017.05.031

55. Mongalo, N.I., McGaw, L.J., Finnie, J.F., and Van Staden, J. (2022). Isolation and characterization of antimicrobial and anti-inflammatory triterpenoids from the acetone extract of Grewia flava DC. (Malvaceae) roots. South African Journal of Botany, 149, 87-95. https://doi.org/10.1016/j.sajb.2022.05.048

56. Mpolokeng, T.G., Nqobile, A., Masondo, N.A., Chakale, M.V., and Aremu, A.O. (2026a). Plant-based remedies for livestock management: An ethnoveterinary assessment in selected rural areas of South Africa. South African Journal of Botany, 192, 484-500. https://doi.org/10.1016/j.sajb.2026.03.009

57. Mpolokeng, T.G., Shikwambana, N., Chakale, M.V., Asong, J.A., McGaw, L.J., Amoo, S.O., Masondo, N.A., and Aremu, A.O. (2026b). Alternative approaches and plant-based remedies for livestock health management among the Batswana of southern Africa: A review. Chemistry and Biodiversity, 23, e03248. https://doi.org/10.1002/cbdv.202503248

58. Mudau, H.S., Mokoboki, H.K., Ravhuhali, K.E., and Mkhize, Z. (2022). Effect of soil type: qualitative and quantitative analysis of phytochemicals in some browse species leaves found in savannah biome of South Africa. Molecules, 27, 1462. https://doi.org/10.3390/molecules27051462

59. Ndou, R.V., Materechera, S.A., Mwanza, M., Otang-Mbeng, W., and Ijane, M.F. (2023). Indigenous knowledge and use of medicinal plants for ethnoveterinary within the North West Province, South Africa. Frontiers in Veterinary Science, 10, 1273562. https://doi.org/10.3389/fvets.2023.1273562

60. Neelo, J., Kashe, K., Teketay, D., and Masamba, W. (2015). Ethnobotanical survey of woody plants in Shorobe and Xobe villages, northwest region of Botswana. Ethnobotany Research and Applications, 14, 367-379. https://doi.org/10.17348/era.14.0.367-379

61. Neudeck, L., Avelino, L., Bareetseng, P., Ngwenya, B.N., and Motsholapheko, M. (2012). The contribution of edible wild plants to food security, dietary diversity and income of households in Shorobe village, northern Botswana. Ethnobotany Research and Applications, 10, 449-462.

62. Nko, K.I., Mwinga, J.L., Asong, J.A., Venter, S.L., Amoo, S.O., and Aremu, A.O. (2025). Cultural perspectives, nutritional and health values of wild edible plants among the Batswana of southern Africa. In: Bvenura, C., and Kambizi, L. (editors). Food security and nutrition: Utilizing undervalued food plants. CRC Press, London, pp. 216-241. https://doi.org/10.1201/9781003469766-15

63. Ocho, D.L., Struik, P.C., and Price, L.L. (2026). An ethnobotanical study of (semi-)wild food plants in Konso, Ethiopia, with special emphasis on the use of pakanna (Amorphophallus spp.). Journal of Ethnobiology and Ethnomedicine, 22, 62. https://doi.org/10.1186/s13002-026-00897-2

64. Palgrave, C.K. (2002). Coates Palgrave trees of southern Africa. C Struik Publishers, Cape Town.

65. Palmer, E., and Pitman, N. (1972). Trees of southern Africa: Covering all known indigenous species in the Republic of South Africa, South-West Africa, Botswana, Lesotho, and Swaziland. Balkema, Cape Town.

66. Pitso, F.S., and Lebese, M.R. (2014). Traditional uses of wild edible plants in arid areas of South Africa. Journal of Human Ecology, 48, 23-31. https://doi.org/10.1080/09709274.2014.11906771

67. Plants of the World Online (POWO). (2026). Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew, Richmond, UK. Available at: https://powo.science. kew.org, accessed on 17 June 2026.

68. Pooley, E. (1993). Trees of Natal, Zululand and the Transkei. Natal Flora Publications Trust, Durban.

69. Pretorius, J.C., Magama, S., and Zietsman, P.C. (2003). Growth inhibition of plant pathogenic bacteria and fungi by extracts from selected South African plant species. South African Journal of Botany, 69, 186-192. https://doi.org/10.1016/S0254-6299(15)30344-6

70. Quattrocchi, U. (2012). CRC world dictionary of medicinal and poisonous plants: common names, scientific names, eponyms, synonyms, and etymology. CRC Press, Boca Raton.

71. Ravhuhali, K.E., Mlambo, V., Beyene, T.S., and Palamuleni, L.G. (2020). Effects of soil type on density of trees and nutritive value of tree leaves in selected communal areas of South Africa. South African Journal of Animal Science, 50, 88-98. https://doi.org/10.4314/sajas.v50i1.10

72. Retief, E., and Meyer, N.L. (2017). Plants of the Free State: Inventory and identification guide. Strelitzia 29, South African National Biodiversity Institute, Pretoria.

73. Roberts, M., and Roberts, S. (2017). Indigenous healing plants. Briza Publications, Pretoria.

74. Rodin, R.J. (1985). The ethnobotany of the Kwanyama Ovambos. Monographs in Systematic Botany from the Missouri Botanical Garden, 9, 132-133. https://doi.org/10.5962/bhl.title.149934

75. Roodt, V. (1998). Trees and shrubs of the Okavango Delta: Shell field guide series part I. Shell Oil Botswana, Gaborone.

76. Schmidt, E., Lotter, M., and McCleland, W. (2017). Trees and shrubs of Mpumalanga and Kruger National Park. Jacana Media, Johannesburg.

77. Shackleton, C.M., Cocks, M.L., Maroyi, A., Ntshanga, N., and Twine, W.C. (2025). The roles, significance and sustainability of plant non-timber forest product use in southern Africa: A review. South African Journal of Botany 184: 1386-1401. https://doi.org/10.1016/j.sajb.2025.07.029

78. Selogatwe, K.M., Asong, J.A., Struwig, M., Ndou, R.V., and Aremu, A.O. (2021). A review of ethnoveterinary knowledge, biological activities and secondary metabolites of medicinal woody plants used for managing animal health in South Africa. Veterinary Sciences. 2021, 8, 228. https://doi.org/10.3390/vetsci8100228

79. Semenya, K., and Machete, M. (2022). Ethnobotanical phenomenology of firewood plants used by Bapedi households in Senwabarwana village, South Africa, 2018- 2022. African Journal of Public Administration and Environmental Studies, 1, 83.

80. Semenya, S.S., and Maroyi, A. (2019a). Source of plants used by traditional healers for respiratory infections and related symptoms in the Limpopo Province. Journal of Biological Sciences, 19(2), 101-121. https://doi.org/10.3923/jbs.2019.101.121

81. Semenya, S.S., and Maroyi, A. (2019b). Ethnobotanical survey of plants used by Bapedi traditional healers to treat tuberculosis and its opportunistic infections in the Limpopo Province, South Africa. South African Journal of Botany, 122, 401-421. https://doi.org/10.1016/j.sajb.2018.10.010

82. Semenya, S.S., and Maroyi, A. (2019c). Source, harvesting, conservation status, threats, and management of indigenous plants used for respiratory infections and related symptoms in the Limpopo Province, South Africa. Biodiversitas Journal of Biological Diversity, 20(3), 789-810. https://doi.org/10.13057/biodiv/d200325

83. Semenya, S.S., and Maroyi, A. (2020). Ethnobotanical survey of plants used to treat respiratory infections and related symptoms in the Limpopo Province, South Africa. Journal of Herbal Medicine, 24, 100390. https://doi.org/10.1016/j.hermed.2020.100390

84. Setshogo, M.P. (2005). Preliminary checklist of the plants of Botswana. Southern African Botanical Diversity Network Report No. 37, SABONET, Pretoria.

85. Setshogo, M.P., and Venter, F. (2003). Trees of Botswana: Names and distribution. Southern African Botanical Diversity Network Report No. 18, SABONET, Pretoria.

86. Sileshi, G.W., Dagar, J.C., Akinnifesi, F.K., and Simon A. Mng'omba, S.A. (2023). Potentials of indigenous fruit trees in enhancing nutrition, income and biodiversity conservation in African agroforestry. In: Dagar, J.C., Gupta, S.R., and Sileshi, G.W. (editors). Agroforestry for sustainable intensification of agriculture in Asia and Africa, sustainable agriculture and food security. Springer, Chan, pp. 321-361. https://doi.org/10.1007/978-981-19-4602-8_11

87. Simpson, M.G. (2010). Plant systematics. Academic Press, Singapore. https://doi.org/10.1016/B978-0-12-374380-0.50001-4

88. Tibe, O., Sutherland, I.A., Lesperance, L., and Harding, D.R.K. (2013). The effect of purified condensed tannins of forage plants from Botswana on the free-living stages of gastrointestinal nematode parasites of livestock. Veterinary Parasitology, 197, 160-167. https://doi.org/10.1016/j.vetpar.2013.07.004

89. Tredgold, M.H. (1990). Food plants of Zimbabwe. Mambo Press, Gweru.

90. Van der Merwe, D., Swan, G.E., and Botha, C.J. (2001). Use of ethnoveterinary medicinal plants in cattle by Setswana-speaking people in the Madikwe area of the North-West Province. Journal of the South African Veterinary Association, 72(4), 189-196. https://doi.org/10.4102/jsava.v72i4.651

91. Van Wyk, B.-E. (2011). The potential of South African plants in the development of new food and beverage products. South African Journal of Botany, 77, 857-868. https://doi.org/10.1016/j.sajb.2011.08.003

92. Van Wyk, P. (2008). Field guide to the trees of the Kruger National Park. Struik Publishers, Cape Town.

93. Van Wyk, B.-E., and Gericke, N. (2018). People's plants: A guide to useful plants of southern Africa. Briza Publications, Pretoria.

94. Van Wyk, B., and Van Wyk, P. (2007). How to identify trees in southern Africa. Struik Nature, Cape Town.

95. Van Wyk, B., and Van Wyk, P. (2013). Field guide to trees of southern Africa. Struik Nature, Cape Town. https://doi.org/10.4081/pb.2012.br1

96. Venter, F., and Venter, J.-A. (2015). Making the most of indigenous trees. Briza Publications, Pretoria.

97. Watt, J.M., and Breyer-Brandwijk, M.G. (1962). The medicinal and poisonous plants of southern and eastern Africa: being an account of their medicinal and other uses, chemical composition, pharmacological effects and toxicology in man and animal. E & S. Livingstone Ltd., Edinburgh.

98. Wehmeyer, A.S. (1986). Edible wild plants of southern Africa: data on the nutrient contents of over 300 species. CSIR, Pretoria.

99. Welcome, A.K., and Van Wyk, B.‐E. (2020). Spatial patterns, availability and cultural preferences for edible plants in southern Africa. Journal of Biogeography, 47, 584-599. https://doi.org/10.1111/jbi.13743

100. Wild, H. (1963). Tiliaceae. In: Excel, A.W., Fernandes, A., Wild, H. (editors). Flora Zambesiaca. Royal Botanic Gardens, Kew, Richmond, pp. 63-91.

101. Wild, H. (1984). Tiliaceae. In: Leistner, O.A. (editor). Flora of Southern Africa 21(1). National Botanical Institute, Pretoria, pp. 1-44.