Peperomia retusa (L.f.) A. Dietr.

1. Var. bachmannii (C.DC.) Düll: plant small; leaves mostly less than 1cm long; flower spike 5-15 mm long; peduncle 4-10 mm long;
2. Var. retusa: plant larger; leaves obovate, up to 15 mm long; spike up to 30 mm long; peduncle 5-15 mm long; creeping stems leafless.
3. Var. mannii (Hook.f.) Düll: plant larger; leaves ovate-elliptic, up to 30mm long; spike 20-50 mm long; peduncle more than 10 mm long; stems leafy throughout.

Burrows, J.E. & Willis, C.K. (eds) (2005). Plants of the Nyika Plateau Southern African Botanical Diversity Network Report No. 31 SABONET, Pretoria Page 224. as Peperomia retusa bachmannii and Peperomia retusa mannii

Diniz, M.A. (1996). Piperaceae of the Flora Zambesiaca area Kirkia 16(1) Pages 78 - 80.

Diniz, M.A. (1997). Piperaceae Flora Zambesiaca 9(2) Pages 33 - 35.

Dowsett-Lemaire, F. (1989). The flora and phytogeography of the evergreen forests of Malawi. I: Afromontane and mid-altitude forests; Bull. Jard. Bot. Nat. Belg. 59(1/2) Page 28.

Fabian, A. & Germishuizen, G. (1997). Wild Flowers of Northern South Africa. Fernwood Press, Vlaeburg. Pages 120 - 121. (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 67. as P. retusa bachmannii, P. retusa retusa and P. retusa mannii

Mathieu, G. (2001-2010). The Internet Peperomia Reference Published on the internet: http://www.peperomia.net/

Phiri, P.S.M. (2005). A Checklist of Zambian Vascular Plants Southern African Botanical Diversity Network Report No. 32 Page 83.

Pooley, E. (1998). A Field Guide to the Wild Flowers of KwaZulu-Natal and the Eastern Region. Natal Flora Publications Trust. Durban. Pages 524 - 525. (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 143 - 144.