Perold, S. M., Botanical Research Institute. Department of Agriculture and Water Supply, South Africa

• Vol 19, No 1 (1989) - Original Research
  Studies in the genus Riccia (Marchantiales) from southern Africa. 11. Riccia montana and R. alboporosa, a further two new white-scaled species of the group ‘Squamatae’
  Abstract  PDF
• Vol 19, No 2 (1989) - Original Research
  Studies in the genus Riccia (Marchantiales) from southern Africa. 14. R. concava section Pilifer
  Abstract  PDF
• Vol 18, No 1 (1988) - Original Research
  Studies in the genus Riccia (Marchantiales) from southern Africa. 8. R. campbelliana (subgenus Riccia), newly recorded for the region
  Abstract  PDF
• Vol 18, No 1 (1988) - Original Research
  Studies in the genus Riccia (Marchantiales) from southern Africa. 9. R. nigrella and the status of R. capensis
  Abstract  PDF
• Vol 16, No 2 (1986) - Original Research
  Studies in the genus Riccia (Marchantiales) from southern Africa. 4. Three endemic species, R. natalensis, R. microciliata sp. nov. and R. mammifera sp. nov.
  Abstract  PDF