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Regnellidium is a
monotypic genus of
ferns of
family Marsileaceae. The
single living species,
Regnellidium diphyllum, the two-leaf
water fern, is native...
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Pilularia Regnellidium...
- some
species occasionally produce six
leaflets per leaf. A
second genus Regnellidium includes a
single living species that
grows only in
southern Brazil and...
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Pilularia Regnellidium...
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Selaginella (spike-mosses),
Pteridium aquilinum (bracken fern),
Marsilea and
Regnellidium (aquatic ferns), and the
enigmatic fossil group Gigantopteridales. In...
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perfoliatus Proserpinaca palustris Ranunculus aquatilis Ranunculus limosella Regnellidium diphyllum Riccia fluitans (Crystalwort)
Ricciocarpos natans Rorippa aquatica...
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regalis Parablechnum wattsii, syn.
Blechnum wattsii, or hard
water fern
Regnellidium diphyllum, or two-leaf
water fern
Salvinia molesta, or
giant water fern...
- The
paleoflora was
known for its
aquatic components,
Paleoazolla and
Regnellidium. However,
recent paleobotanical discoveries at the Cañadón del Irupé...
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Regnellia Barb.Rodr. (a
synonym of
Bletia Ruiz & Pav. Orchidaceae,),
Regnellidium Lindm. (Marsileaceae,) and
Neoregnellia (family Malvaceae,) as well as...
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heterosporous ferns are
aquatic or semi-aquatic,
including the
genera Marsilea,
Regnellidium, Pilularia, Salvinia, and Azolla.
Heterospory also
occurs in the lycopods...
