Royal Tyrrell Museum of Palaeontology
The second species is known from ironstones of the Campanian age Horseshoe Canyon Formation, Alberta, recovered at the "Fred's site" locality. The fossils, housed in the Royal Tyrrell Museum of Palaeontology, were dissolved from the ironstone and embedded into a bioplastic for study. After embedding, the fossils were acid peeled by paleobotanists Rudolph Serbet and Gar W. Rothwell for study in thin section slides. Serbert and Rothell published the description of "W. oroszii" in a 2006 article. The specific epithet "oroszii" is a patronym honoring s Alfred Orosz, paleontologist for the Royal Tyrrell Museum, and discoverer of the species type locality.