16 
and Fort Union of the United States, where also both genera are repre- 
sented by characteristic material, so that the Estevan plants thus far 
discovered lack precise stratigraphic significance. 
Nineteen species are recorded from the Ravenscrag beds. Two of 
these have been discovered in the Estevan and all except the Ginkgo (?) 
stones, the fruit tentatively referred to Paliurus (?), and the new species 
of Cercocarpus and Leguminosites represent rather widespread types common 
in the Lance (ten of the forms), Fort Union (thirteen of the forms), Paskapoo 
(seven of the forms), or equivalent horizons. It would appear that the 
Ravenscrag beds are properly correlated with the Fort Union as it is now 
delimited in Montana and elsewhere in the United States. Evidently 
further collecting from the Ravenscrag beds will yield a large flora. 
Botanically it may be noted that tiiere are nineteen genera and fifteen 
families in thirteen or fourteen orders contained in the present collections 
from Cypress hills, including representatives of the Bryophyta, ArthnophyUi, 
Ginkgophyta, Coniferophyta, and Angiospermophyta. No Monocotyledons 
have been discovered. 
So far as they go they have the same ecological significance as the 
corresponding larger floras of the same age to the southward, in indicating 
a distinctly temperate flora of probably northern origin and possibly 
Holarctic in distribution, certainly at least common to North America 
and northeastern Asia. 
Table of Distribution 
Estevan 
Ravenscrag 
Lance 
Ft. Union 
Paskapoo 
Pre-Lance 
Post-Ft. Union 
Wilcox 
Raton 
Post- Laramie 
Black Buttes 
Hanna 
formation 
Edmonton 
AI archantitea sp 
X 
Equiaetum ap 
X 
Equiaetum rhizome 
? 
X 
Ginkgo adiantoidea 
X 
X 
X 
X 
X 
X 
X 
Ginkgo ? stones 
X 
X 
Taxodium dubium 
X 
X 
X 
X 
X 
X 
X 
X 
Sequoia nordenakioldi 
? 
X 
X 
X 
X 
X 
X 
Juglans nigella 
X 
X 
X 
X 
X 
Ficus mburnifolia 
X 
X 
Ariatolochia crassifolia 
X 
X 
X 
X 
Trochodendroides cuneata 
X 
X 
X 
X 
“ speciosa 
X 
X 
X 
X 
" sp 
X 
Cercocarpus ravenscragensis 
X 
Leguminositea williamsi 
X 
Celaatrus wardii 
X 
X 
X 
** tanrinensia 
X 
X 
X 
X 
Enonymua splendens 
X 
X 
X 
Rhamnites knowltoni 
X 
X 
X 
Paliurus (?) sp 
X 
Trapa microphylla 
X 
X 
X 
X 
X 
X 
Viburnum finale 
X 
X 
“ limpidum 
X 
X 
A peibopsia discolor 
X 
X 
X 
X 
Phyllites aquatictta 
X 
