Polypodiineae

Polypodiineae
Common Polypody,
Polypodium vulgare
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Division: Polypodiophyta
Class: Polypodiopsida
Order: Polypodiales
Suborder: Polypodiineae
Dumort.[1]
Families[1]

Polypodiineae is a suborder of ferns in the order Polypodiales. It is equivalent to the clade eupolypods I in earlier systems,[1][2] and to the very broadly defined family Polypodiaceae in the classification of Christenhusz & Chase (2014).[3] It probably diverged from the suborder Aspleniineae (eupolypods II) during the mid-Cretaceous. The divergence is supported by both molecular data and an often overlooked morphological characteristic which lies in the vasculature of the petiole. Most species that make up the suborder have three vascular bundles. The only exceptions are the grammitid ferns which have one, and the genus Hypodematium which has two. This differs from eupolypods II which mostly have two vascular bundles (except the well-nested blechnoid ferns which generally have at least three).[4]

  1. ^ a b c Cite error: The named reference PPGI was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Smith-2006 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference ChriChas14 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Sudhir-2009 was invoked but never defined (see the help page).