| Literature:
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Bridson, D., Troupin, G. & Verdcourt, B. (1985). Rubiaceae Flore du Rwanda Spermatophytes Volume III Pages 227 - 230. as Vangueria volkensii (Includes a picture).
Bridson, D.M. (1998). Rubiaceae, Part 2 Flora Zambesiaca 5(2) Page 255.
Burrows, J.E., Burrows, S.M., Lötter, M.C. & Schmidt, E. (2018). Trees and Shrubs Mozambique Publishing Print Matters (Pty), Cape Town. Page 936. (Includes a picture).
Mapaura, A. & Timberlake, J. (eds) (2004). A checklist of Zimbabwean vascular plants Southern African Botanical Diversity Network Report No. 33 Sabonet, Pretoria and Harare Page 74.
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