- ... that seeds of the extinct tree Eucommia montana are found from British Columbia to Colorado?
- ... that the extinct fern Wessiea is known from Miocene fossils found at the "Ho ho" locality in Yakima County, Washington?
- ... that the extinct Eocene maples Acer hillsi and Acer stewarti are distinguished by how inflated the nut is?
- Paleontology in Vermont
- ... that the extinct arum family plants Petrocardium and Montrichardia aquatica are known only from the Paleocene Cerrejón Formation rainforest in Colombia?