Helminthostachys zeylanica
- Citations total:
- 2
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| details | Recent | Nd | Knox,E.M. The spores of Pteridophyta, with observations on microspores in Coals of Carboniferous age. | 1939 | |
| details | Recent | Australia | Playford,G. et al. Spores. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) | 1996 |