Ocimum obovatum Benth.
subsp. obovatum
var. obovatum

Baumann, G. (2005). Photographic Guide to Wildflowers of Malawi Wildlife and Environmental Society of Malawi Pages 144 - 145. as Becium grandiflorum var. obovatum (Includes a picture).

Burrows, J.E. & Willis, C.K. (eds) (2005). Plants of the Nyika Plateau Southern African Botanical Diversity Network Report No. 31 SABONET, Pretoria Page 187.

Chapano, C. & Mamuto, M. (2003). Plants of the Chimanimani District National Herbarium and Botanic Garden, Zimbabwe Page 8. As Becium obovatum obovatum obovatum

Chapano, C. & Mugarisanwa, N.H. (2003). Plants of the Matobo District National Herbarium and Botanic Garden, Zimbabwe Page 6. As Becium obovatum obovatum obovatum

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 77. As Becium obovatum

Fabian, A. & Germishuizen, G. (1997). Wild Flowers of Northern South Africa. Fernwood Press, Vlaeburg. Pages 346 - 347. As Becium grandiflorum obovatum (Includes a picture).

Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22 SANBI, Pretoria Page 108.

Jacobsen, W.B.G. (1967). The influence of copper content of the soil on trees and shrubs of Molly South Hill, Mangula Kirkia 6(1) Pages 63 - 84. As Becium obovatum

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 56.

Ntore, S. & al. (2024). Checklist of the vascular plants of Burundi Page 149.

Paton, A.J. et al. (2013). Lamiaceae Flora Zambesiaca 8(8) Pages 130 - 132.

Phiri, P.S.M. (2005). A Checklist of Zambian Vascular Plants Southern African Botanical Diversity Network Report No. 32 Page 70.

Pooley, E. (1998). A Field Guide to the Wild Flowers of KwaZulu-Natal and the Eastern Region. Natal Flora Publications Trust. Durban. Pages 188 - 189. As Becium obovatum (Includes a picture).

Strugnell, A.M. (2006). A Checklist of the Spermatophytes of Mount Mulanje, Malawi Scripta Botanica Belgica 34 National Botanic Garden of Belgium Pages 111 - 112.

Troupin, G. & Ayobangira, F-X. (1985). Lamiaceae Flore du Rwanda Spermatophytes Volume III Page 304. As Becium obovatum (Includes a picture).

Van Wyk, B. & Malan, S. (1988). Field Guide to the Wild Flowers of the Witwatersrand and Pretoria Region Struik, Cape Town Pages 64 - 65. As Becium obovatum obovatum (Includes a picture).