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).

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.

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.

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).