Claim: The Acrostichum is a vascular plant group with over 10,000 species in the Polypodiales order and Acrostichum genus.
Evidence: Acrostichum is a fern genus in the Parkerioideae subfamily of the Pteridaceae. Order: Polypodiales Genus: Acrostichum
L. The group includes about 10,560 known extant species.