phegopteris การใช้

• Genetic analysis has shown the " Phegopteris " genus to be a sister clade to the rest of the thelypteroid ferns.
• There is either no frond sori are mostly reniform in shape and have indusia, except for the " Phegopteris " group.
• The same genetic studies show that the traditional genus " Phegopteris " is, in fact, a clearly segregate group that diverges at the very base of the family tree.
• In fact, this particular clade also includes the genera " Pseudophegopteris " and " Macrothelypteris ", which are here included in the larger genus " Phegopteris ".
• However, recent genetic evidence clearly shows that the genera " Macrothelypteris " and " Pseudophegopteris ", as well as other clade, and so are now included as " Phegopteris " species.
• An intermediate position is to place the bulk in " Thelypteris " ( which can then be divided into subgenera and sections corresponding to the genera of other authors ) but to separate out " Phegopteris " and " Macrothelypteris ".
• However, molecular data shows an affinity between a group of species which are sometimes classified in " Macrothelypteris ", " Phegopteris ", and allied genera, so it is common to remove this species from " Thelypteris " and classify it as " Macrothelypteris torresiana ".