At this time, nearly all major physiognomic foliage types can be found. There also appear to be strong latitudinal gradients in leaf types established by the Mid-Cenomanian. Arctic megafloras are dominated by broadleaved deciduous forests, the distribution of which was probably controlled by winter darkness and possibly freezing temperatures. Cenomanian to Coniacian assemblages show a rich and diverse conifer assemblage in which there is evidence for increasing diversity of angiosperms. Palms first appear in the Santonian in eastern North America and extend their range into higher middle latitudes and other monocots have been documented.
Fern pollen is abundant, but at a reduced diversity than in lower latitudes.
Southern Laurasian - warm, temperate to subtropical. Southern Gondwana - warm temperate to subtropical climate. Podocarp bisaccate pollen abundant, pteridophyte diversity. Northern Western Interior and Pacific Coast supported subhumid, broad-leaved evergreen forest living under seasonally wet conditions. Higher diversity of vines, some species with drip tips.