South African government website - for information post 1994 - bills, acts, white and green papers, statistics, links to departments (at the home page click on the 'Documents' option).
Department of Environmental Affairs
Sabinet Legal - provides access to current and retrospective national government gazettes and post 1994 provincial legislation. Netlaw provides access to the msot recent versions of statutes currently in force along with regulations.
There are various online sites providing information about South African biomes:
South Africa's biomes. Provides maps
PlantZa Africa.com. Provides maps