FLORA OF THE CHEYENNE SANDSTONE OF KANSAS, 
whole with the outer margins broadly decur- 
rent and joining the lamina of the leaflet next 
below at the point of junction of its inner 
margin with the rachis. Certain specimens 
show all the leaflets petiolate, a feature largely 
emphasized in a specimen from Stump Neck, 
Md., figured by me in 1911, showing three | 
terminal leaflets with petioles 3 to 4 centi- 
meters in length. 
The leaflets in this species are much more 
commonly petiolate and lacking in the winged 
rachis than those in S.:variabilis, in this par- 
ticular closely resembling the leaflets of the 
modern Matayba apetala, in which the rachial 
wings are vestigial. Leaf substance thick and 
leathery; epidermis firm and glossy. Leaflets 
commonly subopposite, often markedly so, 
forming an acute angle with the rachis. Mid- 
ribs stout and prominent below. Secondaries 
slender, seen only-on the under surface of the 
leaflets and even there made out with diffi- 
culty, eight to ten pairs, branching from the 
midrib at a rather wide angle, especially in the 
central part of the leaf; the angle is more 
acute basally, curving upward ultimately to 
jom a short branch of the secondary next 
above. ‘Tertiaries fine, forming lax subrhom- 
bic areolae where visible. . 
This species is very common at certain 
localities in the Patapsco formation of Mary- 
land and Virginia, although at other outcrops 
of this same formation it has not been detected. 
The grounds for the separation of this 
species from S. variabilis are slight, as both are 
variable and the larger forms of S. variabilis 
are quite as large as the smaller forms of 
8. magnifolia. In _ the Patapsco formation 
the two species are found in association at all 
the localities where either. occurs, and the 
smaller species is usually the more common, 
as if the larger species represented its occa- 
sional more robust forms. On the other 
hand, 8. magnifolia has not been detected in 
the abundant remains referred to S. variabilis 
found at Oak Creek, Wyo., and there is com- 
monly considerable disparity in size between 
the two. There are certain other differences 
which appear to be constant. 
folia, with less numerous and somewhat more 
suspicion. 
These are the 
thicker, relatively longer leaflets of S. magni- |, 
* 215 
ascending secondaries, which are not connected 
distad by relatively flat arches. 
The form recorded from the Cheyenne sand- 
stone as Rhus uddeni Lesquereux belongs to 
this species, and I am convinced that this is true 
of Lesquereux’s type material recorded from 
the Dakota sandstone and collected, according 
to J. A. Udden, “from the west slope of ‘the 
Smoky Hill Buttes near Salemburg post office, 
Saline County, Kans.’’ There are a number 
of other species described by Lesquereux in 
the “Flora of the Dakota, group” which, 
although I do not feel justified in transferring 
them to Sapindopsis, are open to more or less 
These are Aralia masoni Lesque- 
reux,”* collected 10 miles northeast of Delphos, 
Kans., which might represent the terminal 
part of a Sapindopsis leaf; Laurus angusta 
Heer,?° which is a fragment from Ellsworth 
County, Kans., that in both form and venation 
agrees with Sa vaneioper: Leguminosites hymeno- 
phyllus Lesquereux,®° which is somewhat less 
similar to the known species of Sapindopsis; 
Sapindus diversifolius Lesquereux,"* from Ells- 
worth County, Kans., which is ‘also less similar 
to the known species of Sapindopsis; and Rhus 
powelliana Lesquereux,” obtained near Fort 
Harker, Kans., which differs from Sapindopsis 
in the subordinate lobing and small leaflets 
developed at the base of the proximal lateral 
leaflets, in these features resembling Rhus, but 
which is sufficiently like Sapindopsis to be 
open to more or less suspicion. 
This species has been found in the Cheyenne 
sandstone at the black hills near Belvidere 
(773); Osage Rock, Belvidere (2217, 2232, 
7406); Stokes Hill 100 yards south of National 
Corral (2219); Stokes Hill (2220); Thompson 
Creek near the flume, 2 miles northwest of 
Belvidere (2221); near Medicine Lodge Creek, 
2 miles west of Belvidere (2224); left bank of - 
middle branch of Champion (Wildcat) Draw, 
half a mile south of Belvidere (2229); shale 
along right branch of Champion (Wildcat) 
Draw (2228); and right bank of middle branch 
of Champion (Wildcat) Draw (2231). 
38 Lesquereux, Leo, U.S. Geol. Survey Mon. 17, p. 133, pl. 15, fig. 4, 1892. 
2 Idem, p. 93, pl. 16, fig. 7. 
30 Idem, p. isa, pl. 55, figs. 7-9. 
“ alIdem, p. 158, pl. 64, fig. 18. © 
32. dem, p. 155, pl. 56, figs. 4, 5. 
