Regnellidium
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Regnellidium is a monotypic genus of ferns of family Marsileaceae.
Regnellidium diphyllum
Marsileaceae
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Marsileaceae is a small family of heterosporous aquatic and semi-aquatic ferns, though at first sight they do not physically resemble other ferns. The group is commonly known as the "pillwort family"
Regnellidium
…Regnellidium is a monotypic genus of ferns of family Marsileaceae. The single living species, Regnellidium diphyllum, the two-leaf waterfern, is native to southeastern Brazil and adjacent regions of Argentina. It…
Illustration Pilularia globulifera 0
Leaves of the Hawaiian species Marsilea villosa
The European species Pilularia globulifera bearing sporocarps
An African species of Marsilea with floating leaves