| Literature: | Bridson, D.M. & Verdcourt, B. (2003).  Rubiaceae, Part 3 Flora Zambesiaca 5(3)  Pages 578 - 579.    Burrows, J.E. & Willis, C.K. (eds) (2005).  Plants of the Nyika Plateau Southern African Botanical Diversity Network Report No. 31  SABONET, Pretoria Page 248.   Burrows, J.E., Burrows, S.M., Lötter, M.C. & Schmidt, E. (2018).  Trees and Shrubs Mozambique   Publishing Print Matters (Pty), Cape Town.  Page 993.   (Includes a picture). Ntore, S. & al. (2024).  Checklist of the vascular plants of Burundi    Page 224.   Strugnell, A.M. (2006).  A Checklist of the Spermatophytes of Mount Mulanje, Malawi Scripta Botanica Belgica 34  National Botanic Garden of Belgium Pages 165 - 166.    |