CHAPTER XXVI.
| HYDROPTERIDEAE | I. II. | Marsiliaceae. Salviniaceae. |
The unsatisfactory and meagre records in regard to the past history of these heterosporous Filicales render superfluous more than a brief reference to the recent species.
| HYDROPTERIDEAE | I. II. | Marsiliaceae. Salviniaceae. |
The unsatisfactory and meagre records in regard to the past history of these heterosporous Filicales render superfluous more than a brief reference to the recent species.