Among the oldest records of Angiosperm macrofossils are "Montsechia" from the Barremian aged Las Hoyas beds of Spain and "Archaefructus" from the Barremian-Aptian boundary Yixian Formation in China. Tricolpate pollen distinctive of eudicots first appears in the Late Barremian, while the earliest remains of monocots are known from the Aptian. The oldest known fossils of grasses are from the Albian, with the family having diversified into modern groups by the end of the Cretaceous. The oldest large angiosperm trees are known from the Turonian (c. 90 Ma) of New Jersey, with the trunk having a preserved diameter of and an estimated height of .