Zimbabwe botany
Aloe and Cactus Zimbabwe http://www.zarnet.ac.zw/zsa/aloe.html
Flora of Zimbabwe http://www.zimbabweflora.co.zw/

Regional botany
Sabonet http://www.sabonet.org

South Africa:
SA Botany on the net (a compilation of sites)
http://www.botany.uwc.ac.za/gavin/Pop_articles/popart05.htm
Flora of Southern Africa
http://www.nbi.ac.za/products/publications/florasa.htm
Protea Atlas Project http://protea.worldonline.co.za/default.htm
Botanical Society of SA http://www.botanicalsociety.org.za/

Botanical Institutions
National Herbarium and Bot anic Garden, Harare
http://www.nationalherbarium.org.zw/
Kew Gardens http://www.kew.org/
NBI, Pretoria http://www.nbi.ac.za/pretoria/mainpage.htm
Kirstenbosch Botanic Garden http://www.nbi.ac.za/kirstenbosch/mainpage.htm
Missouri Botanic Garden http://www.mobot.org/

Environment/conservation
Biodiversity Foundation http://www.biodiversityfoundation.org/
Zambezi Society http://www.zamsoc.org/
Wild life Society of SA http://www.wildlifesociety.org.za/