Published in Journal of South African botany, in 1971, in volume 37, issue 1, pages 53-56

Published in Journal of South African botany, in 1971, in volume 37, issue 1, pages 57-70

Published in Journal of South African botany, in 1971, in volume 37, issue 1, pages 71-72

Published in Journal of South African Botany, in 1971, in volume 37, issue 2, pages 75-101

Published in Journal of South African botany, in 1971, in volume 37, issue 1, pages 1-30

Published in Journal of South African botany, in 1971, in volume 37, issue 1, pages 31-35

Published in Journal of South African Botany, in 1971, in volume 37, issue 2, pages 127-133

Published in Journal of South African Botany, in 1971, in volume 37, issue 2, pages 135-136

Published in Journal of South African Botany, in 1971, in volume 37, issue 3, pages 139-142

Published in Journal of South African Botany, in 1971, in volume 37, issue 3, pages 157-167

Published in Journal of South African Botany, in 1971, in volume 37, issue 3, pages 169-176

Published in Journal of South African Botany, in 1971, in volume 37, issue 3, pages 177-182

Published in Journal of South African botany, in 1971, in volume 37, issue 1, pages 37-40

Published in Journal of South African botany, in 1971, in volume 37, issue 1, pages 41-51

Published in Journal of South African Botany, in 1971, in volume 37, issue 2, pages 103-108

Published in Journal of South African Botany, in 1971, in volume 37, issue 2, pages 109-125

Published in Journal of South African Botany, in 1971, in volume 37, issue 3, pages 147-156

Published in Journal of South African Botany, in 1971, in volume 37, issue 3, pages 143-146

Published in Journal of South African Botany, in 1971, in volume 37, issue 4, pages 291-304

Published in Journal of South African Botany, in 1971, in volume 37, issue 4, pages 305-315

Published in Journal of South African Botany, in 1971, in volume 37, issue 4, pages 317-460

Published in Journal of South African Botany, in 1971, in volume 37, issue 3, pages 189-198

Published in Journal of South African Botany, in 1971, in volume 37, issue 3, pages 199-212

Published in Journal of South African Botany, in 1971, in volume 37, issue 3, pages 213-218

Published in Journal of South African Botany, in 1971, in volume 37, issue 3, pages 245-246

Published in Journal of South African Botany, in 1971, in volume 37, issue 4, pages 249-266

Published in Journal of South African Botany, in 1971, in volume 37, issue 4, pages 267-268

Published in Journal of South African Botany, in 1971, in volume 37, issue 3, pages 219-227

Published in Journal of South African Botany, in 1971, in volume 37, issue 3, pages 229-235

Published in Journal of South African Botany, in 1971, in volume 37, issue 4, pages 281-289

Published in Journal of South African Botany, in 1971, in volume 37, issue 3, pages 237-243

Published in Journal of South African Botany, in 1971, in volume 37, issue 4, pages 269-279

Published in Journal of South African Botany, in 1971, in volume 37, issue 3, pages 183-187

Published in Journal of South African botany, in 1971, in volume 37, issue 4, pages 461-462

Published in Journal of South African botany, in 1971, in volume 37, issue 1