FLORA OF THE CHEYENNE SANDSTONE OF KANSAS. 
incurved and sometimes disappearing some dis- 
tance above the point of insertion. To judge 
by the lack of petiolules and the generally com- 
plete character of the material it does not ap- 
pear that the leaflets were normally shed, and 
this is also indicated by the concrescence of 
the terminal leaflets.. The leaves are cori- 
aceous and appear to have been stiff and strict in 
habit. The rachis is stout and expanded prox- 
imad. The midribs are excessively stout and 
prominent on the lower surface. The seconda- 
ries are relatively thin, straight, and subpar- |’ 
allel. They vary from camptodrome to cras- 
pedodrome. 
leaf and sometimes in the apex they are camp- 
todrome. In many specimens one secondary 
runs to each marginal tooth, although in other 
specimens the camptodrome habit is retained 
and a short branch enters the marginal tooth. 
All these features are indicated in the accom- 
panying figures. The tertiary venation is 
usually obsolete, as the matrix is prevailingly 
coarse. Occasionally percurrent nervilles are 
seen. In specimens with broadly winged stripe 
the venation of the leaf is continued in these 
wings. 
This handsome species is represented by a 
large amount of material, which is fortunate, 
as it would be almost impossible to correlate 
fragmentary material. It is clearly -a, repre- 
sentative of the genus Sapindopsis and would 
well merit the specific name of variabilis had 
that not already been used for the type of the 
_ genus, which came from the Patapsco forma- 
tion of Maryland and Virginia. 
In the Patapsco formation the genus Sapin- 
dopsis may be totally absent from a locality 
or present in the greatest abundance, and this 
is equally true of the Cheyenne sandstone. of 
Kansas, indicating possibly a gregarious habit. 
Various species of existing Sapindaceae 
show similarities to the present species in form, 
venation, and variation. All the previously 
described species of Sapindopsis had entire 
margins,-and no trace of toothed margins has 
been found in the material from the Atlantic 
Coastal Plain. The existing genus Matayba 
Aublet, with which I originally compared 
Sapindopsis, has leaves with both entire and 
dentate margins, and the general features 
of Sapindopsis are shared by other tropical 
American genera of Sapindaceae. The genus 
Matayba comprises about two score existing 
In the entire basal part of the | 
217 
species and is closely related to Cupania, also 
exclusively American in the existing flora— 
in fact, all the genera of the tribe Cupanieae 
lomatorrhizae as segregated by Radlkofer are 
confined to the warmer regions of the Western 
Hemisphere. 
Occurrence: Localities 2221, 2224, 2229, 
2230, 7406, Medicine Lodge Creek, in draw 3. 
miles above Belvidere (Cheyenne sandstone 
No. 8 of Hill); collected by Ward and Vaughan, 
October 18, 1896 (unnumbered). 
Order MALVALES. 
Family STERCULIACEAE.. 
Genus STERCULIA Linné. 
Sterculia towneri (Lesquereux) Berry. 
Plate LVII, figure 1; Plate LX; Plate LXTI, figure 1. 
Aralia towneri Lesquereux, U. 8. Geol. and Geog. Survey 
Terr. Bull., vol. 1, p. 394, 1875 [1876]; Ann. Rept. 
for 1874, p. 349, pl. 4, fig. 1, 1876; Cretaceous and 
Tertiary floras, p. 62, pl. 6, fig. 4, 1883; Flora of the ' 
Dakota group, p. 132, pl. 23, figs. 3, 4; pl. 31, fig. 1; 
1892. 
Sterculia draket Cummings, Texas Geol. Survey Third 
Ann. Rept., p. 210, fig. 8, 1892. 
Knowlton, in Hill, Am. Jour. Sci., 4th ser., vol. 1, 
p. 213, 1895. 
Sterculia snowti- Lesquereux, Flora of the Dakota group, 
p. 183, pl. 30, fig. 5; pl. 31, figs. 2, 3; pl. 32, figs. 1-4, 
1892. . 
Hollick, U. 8. Geol. Survey Mon. 50, p. 94, pl. 34, 
fig. 20, 1907. ne 
Aralia towneri Hollick, New York Agad. Sci. Trans., 
vol. 16, p. 132, pl. 14, figs. 11, 12, 1897. 
Berry, New York Bot. Garden Bull., vol. 3, p. 92, 
1903. 
I have long thought that the Aralia towneri 
and Sterculia snowit of Lesquereux represented 
a single species but have never had a chance to 
test this belief until I received the present 
collections from the Cheyenne sandstone, 
in which this is one of the most abundant 
forms. It shows considerable variation in 
size but obviously represents a single botanic 
species. Unfortunately the name towneri ante- 
dates snowti by some 15 years, so that the latter, 
which is much the better known of the two, 
becomes a synonym. 
‘From the large amount of material now 
available the species may be described as 
follows: 
Leaves of variable and often very large size, 
palmately two: to seven lobed. The lobes are 
prevailingly conical and acuminate, occa- 
