LIST OF LITERATURE QUOTED
- Baker , J. G. 1877 . Handbook of Fern Allies ,
- Guppy , H. B. 1914 . “Notes on the Native Plants of the Azores” in Kew Bulletin
- Marloth , R. 1913 . The Flora of South Africa , i
- Osborn , T. G. B. 1922 . “Some Observations on Isoeres Drummondii, A.Br.” . Annals of Botany , xxxvi : 41
- Pfeiffer , N. E. 1922 . Monograph of the Isoetaceae ,
- Ridgway , R. 1912 . Color Standards and Color Nomenclature ,
- Sim , T. R. 1906 . Trans. S. Afr. Phil. Soc. , xvi, pt. 3
- Sim , T. R. 1915 . The Ferns of South Africa ,