1. Plant form: An illustrated guide to flowering plant morphology;Bell,1991
2. Contributions to our knowledge of the anatomy of South African poisonous plants;Breyer-Brandwijk;S. Afr. J. Sci.,1934
3. The poisonous principle and histology of Gloriosa virescens Lindl;Burden;J Pharm. Pharmac.,1955
4. The monocotyledons: a comparative study;Dahlgren,1982
5. The families of monocotyledons;Dahlgren,1985