probably hybrid with Nephrolepis exalta (ie Nephrolepis X averyi  Nauman (Davalliaceae)

Giant sword fern

hybridized with wild boston fern

                                    1780 2006

frond tapers at top and bottom but petals are well separated unlike overlapping on exalata, there is space between pinnae and pinnae taper  to point;. See discussion on website  http://fig.cox.miami.edu/~scofield/sofl_plants/fern_nephrolepis_x_averyi.html by Doug Scofield

                                                                                    1780 2006

the serrations do not alternate perfectly, large and small, like on biserrata

This specimen was collected on NE fence line in c1998, placed in pot. Remaining specimens disappeared.

See also for discussion:

http://www.corkscrew.audubon.org/Wildlife/FernID/Pinnate.html - Giant Sword Fern

native

Nephrolepis cordifolia  (L.) Presl (Davalliaceae)

Tuberous Sword Fern - Exotic

place holder