Cor. 53. Corwin Bluffs.
Birisia is a combination of foliage like this plus fertile foliage but because the foliage is similar to Samylina's material (Samylina, 1972) we suggest that it is useful for phytostratigraphic purposes to assign this specimen to Birisia acutata. Samylina's material came from the Albian Bourkemuss Flora.