Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Sphaeropteris:

"

Sphaeropteris is now separated from the other genera in the family Cyatheaceae primarily on the basis of molecular phylogenetic studies.[2] However, the scales on the stalks (petioles) provide a morphological distinction. Sphaeropteris has scales without distinct margins, whereas the other genera have scales with distinct margins.[3][4]