Search results
Results from the WOW.Com Content Network
Sceptridium biternatum, the southern grapefern or sparse-lobe grape fern , is a perennial fern in the family Ophioglossaceae, occurring in eastern North America.It occurs in "low woods, in hardwood and pine forests, in fields, and on roadsides."
Holts said Azolla, also known as "duck fern" or "mosquito fern,” is a genus of plants that can be found worldwide. "It likes slow, quiet ponds. It doesn't like a lot of wind or a lot of current ...
The fern crown group, consisting of the leptosporangiates and eusporangiates, is estimated to have originated in the late Silurian period 423.2 million years ago, [4] but Polypodiales, the group that makes up 80% of living fern diversity, did not appear and diversify until the Cretaceous, contemporaneous with the rise of flowering plants that ...
Sceptridium is a genus of seedless vascular plants in the family Ophioglossaceae, [1] closely allied to (and often included as a subgenus [2] of) the genus Botrychium (the moonworts and grapeferns). It is also closely related to the genus Botrypus (the rattlesnake fern, often treated as the subgenus Osmundopteris under Botrychium ).
The young opening fronds of many species are usually tinged with red. Blechnaceae is a family of ferns in the order Polypodiales , with a cosmopolitan distribution . Its status as a family and the number of genera included have both varied considerably.
The term "fern ally" included under Pteridophyta generally refers to vascular spore-bearing plants that are not ferns, including lycopods, horsetails, whisk ferns and water ferns (Marsileaceae, Salviniaceae and Ceratopteris). This is not a natural grouping but rather a convenient term for non-fern, and is also discouraged, as is eusporangiate ...
Adiantum lunulatum. Pteridaceae is a family of ferns in the order Polypodiales, [2] including some 1150 known species in ca 45 genera [3] (depending on taxonomic opinions), divided over five subfamilies. [4]
Below are lists of extant fern families and subfamilies using the classification scheme proposed by the Pteridophyte Phylogeny Group in 2016 (PPG I). [1] The scheme is based on molecular phylogenetic studies, and also draws on earlier classifications, [1] particularly those by Smith et al. (2006), [2] Chase and Reveal (2009), [3] and Christenhusz et al. (2011). [4]