Cryptolepis oblongifolia Schltr.

Binns, B. (1968). A First Check List of the Herbaceous Flora of Malawi The Government Printer, Zomba, Malawi Page 20. as Ectadiopsis oblongifolia and E. producta

Bruce, E.A. (1946). Notes on Some Species of the Genus Cryptolepis R. Br.: I Kew Bulletin 1(1) Pages 46 - 48.

Bruyns, P.V. (2014). The Apocynaceae of Namibia Strelitzia 34 SANBI, Pretoria, South Africa Pages 21 - 22.

Burrows, J.E. & Willis, C.K. (eds) (2005). Plants of the Nyika Plateau Southern African Botanical Diversity Network Report No. 31 SABONET, Pretoria Page 70. (Includes a picture).

Chapano, C. & Mamuto, M. (2003). Plants of the Chimanimani District National Herbarium and Botanic Garden, Zimbabwe Page 23. As Ectadiopsis oblongifolia

Chapano, C. & Mugarisanwa, N.H. (2003). Plants of the Matobo District National Herbarium and Botanic Garden, Zimbabwe Page 14. As Ectadiopsis oblongifolia

Da Silva, M.C., Izidine, S. & Amude, A.B. (2004). A preliminary checklist of the vascular plants of Mozambique. Southern African Botanical Diversity Network Report No. 30 Sabonet, Pretoria Page 25. As Ectadiopsis oblongifolia

Fabian, A. & Germishuizen, G. (1997). Wild Flowers of Northern South Africa. Fernwood Press, Vlaeburg. Pages 310 - 311. (Includes a picture).

Goodier, R. & Phipps, J.B. (1961). A revised checklist of the vascular plants of the Chimanimani Mountains Kirkia 1 Page 62. as Ectadiopsis oblongifolia

Goyder, D.J., Gilbert, M.G. & Venter, H.J.T. (2020). Apocynaceae (Part 2) Flora Zambesiaca 7(2) Pages 8 - 11. (Includes a picture).

Joubert, L. (2007). A taxonomic study of Cryptolepis (Apocynaceae) in Southern Africa Faculty of Natural and Agricultural Sciences, Department of Plant Sciences (Botany) at the University of the Free State Bloemfontein Pages 133 - 137.

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 66. also as Cryptolepis producta

Phiri, P.S.M. (2005). A Checklist of Zambian Vascular Plants Southern African Botanical Diversity Network Report No. 32 Page 24. also as Cryptolepis producta

Pooley, E. (1998). A Field Guide to the Wild Flowers of KwaZulu-Natal and the Eastern Region. Natal Flora Publications Trust. Durban. Pages 300 - 301. (Includes a picture).

Setshogo, M.P. (2005). Preliminary checklist of the plants of Botswana. Sabonet Report no. 37. Sabonet, Pretoria and Gaborone Page 26.

Steedman, E.C. (1933). Some Trees, Shrubs and Lianes of Southern Rhodesia. Page 70.

Timberlake, J.R. & Childes, S.L. (2004). Biodiversity of the Four Corners Area: Technical Reviews Volume Two (Chapter 5-15) Appendix 5-1: Plant Checklist Occasional Publications in Biodiversity 15 Page 221. as Ectadiopsis oblongifolia

Van Wyk, B. & Malan, S. (1988). Field Guide to the Wild Flowers of the Witwatersrand and Pretoria Region Struik, Cape Town Pages 170 - 171. (Includes a picture).

Wursten, B., Timberlake, J. & Darbyshire, I. (2017). The Chimanimani Mountains: an updated checklist. Kirkia 19(1) Page 88.