(1963)  Page(s) 99, 104, 106.  
 
p. 99: Leo Lesquereux in 1883 described the first American rose from the Oligocene Florissant beds in Colorado, naming it Rosa hilliae. Subsequently, many apparently different forms were discovered in the United States and elsewhere, and a deluge of new species names were applied. Chaney (1927, p. 123) suggested that Rosa hilliae be made a form species by incorporating the following undoubtedly identical forms: Rosa wilmattae Cockerell (leaf), R. scudderi Knowlton (leaf), R. inquirenda Knowlton (calyx), and R. ruskiniana Cockerell (bud). MacGinitie (1953, p. 121), in his ‘‘Fossil plants of the Florissant beds in Colorado", concurred by upholding the synonymy. Nevertheless, new species names appear in literature with scant regard for morphological or variational similarity to the American form species.

p. 104: Rosa hilliae (figs. 1-6; 11-14 ; 50-59) from the Oligo-Miocene, as the priority type of the American group, should include the Miocene R. miocenica Axelrod, the Oligocene R.? inguirenda Knowlton, R. scudderi Knowlton, and the Paleo-Eocene R. cetera Hollick and R. confirmata Hollick from Alaska.....

p. 106: There is unanimous agreement that Rosa wilmattae Cockerell (1908) (fig. 7) and R. scudderi Knowlton (1916) (fig. 8), both from Florissant, are identical with R. hilliae. The fossil record of the Oligocene Ruby paper shales fully confirms this conclusion. R.? inquirenda Knowlton (1916) (fig. 9) represents a pentamerous calyx which is doubtfully assigned to Rosa. Since this specimen is a Florissant fossil, as is Lesquereux's R. hilliae the calyx, if it is of a rose, should be properly assigned to R. hilliae. The same reasoning applies to the bud impression of R. ruskiniana Cockerell (1908) (fig. 10), also from the Florissant