Regnellidium
| Regnellidium | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae |
| Division: | Pteridophyta |
| Class: | Polypodiopsida / Pteridopsida (disputed) |
| Order: | Salviniales |
| Family: | Marsileaceae |
| Genus: | Regnellidium |
| Species | |
|
Regnellidium diphyllum Lindm. | |
Regnellidium is a monotypic genus of ferns of family Marsileaceae.
The single living species, Regnellidium diphyllum, Two-leaf Water Fern, is native to South Eastern Brazil and adjacent regions of Argentina. It resembles its relatives from the genus Marsilea, but has 2-lobed leaves (rather than 4). This fern is sometimes grown in aquaria. It is the only non-flowering plant that produces latex.
A fossil assigned to the species Regnellidium upatoiensis has been found in Cretaceous deposits of the eastern United States.
References
- Lupia, R.; Schneider, H.; Moeser, G. M.; Pryer, K. M.; Crane, P. R. (2000). "Marsileaceae Sporocarps and Spores from the Late Cretaceous of Georgia, U.S.A". International Journal of Plant Sciences 161 (6): 975–988. doi:10.1086/317567.
- Mabberley, D. J. (1997). The Plant-Book. Cambridge University Press.