216 
Sapindopsis brevifolia Fontaine. 
Plate LV, figure 1; Plate LIX, figure 1. 
Sapinddpsis brevifolia Fontaine, U. 8. Geol. Survey Mon. 
15, p. 300, pl. 153, fig. 4; pl. 155, figs. 1, 7; pl. 163, 
fig. 3, 1890; in Ward, U.S. Geol. Survey Mon. 48, 
pp. 481, 482, 528, 1906. 
Berry, U. 8. Nat. Mus. Proc., vol. 38, p. 644; Mary- 
land Geol. Survey, Lower Cretaceous, p. 473, pl. 87, 
figs. 2-5, 1911. 
Leaves odd-pinnate, the terminal leaflet 
considerably larger than the lateral leaflets, of 
which but two pairs are known. These are 
opposite. Leaflets somewhat crowded so that 
their margins often overlap, with subacute 
tips, varying in length from 2 to 5 centimeters 
and in width from 0.8 to 1.6 centimeters, aver- 
aging about 3 centimeterslong by 1.3 centime- 
ters wide. Inequilateral toward the base and 
showing considerable variation in decurrence, 
even among the few.specimens known; in 
some the rachis is conspicuously winged; in 
others the leaflets are all petioled, the whole 
having the aspect of some member of the 
Leguminoseae. Midribs stout; secondaries as- 
cending, camptodrome, seen with difficulty, 
as the leaf texture is coriaceous. 
This is a poorly marked species of infre- 
quent occurrence at. the same localities where. 
the other species of this genus occur and may 
simply represent a variant of S..variabilis; 
in fact, there is no reason for considering it to 
represent a distinct botanic species, and the’ 
name is retained temporarily simply. as a 
geologic convenience, to be eventually 
dropped entirely. 
The Cheyenne sandstone localities are i 
miles northwest of Belvidere (2218), 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); Osage 
Rock, Belvidere (2232). 
Sapindopsis belviderensis Berry, n. sp. 
Plates XLIX-LIV. 
Leaves of variable size, pinnately compound, 
ranging in length (in the collected material) 
from 8 to 19 centimeters and in maximum 
width from 4.5 to 14 centimeters. These leaves 
are prevailingly odd-pinnate, but a few are 
even-pinnate. In addition to the odd terminal 
leaflet generally present there are invariably 
SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1921. 
three pairs of lateral leaflets, which are gener- 
ally opposite but sometimes subopposite. 
These usually decrease regularly i in size from 
the distal to the proximal pair. In some speci- 
mens the terminal leaflet is equilateral, but 
all the other leaflets are inequilateral, often 
markedly so. All except the terminal leaflet 
are invariably sessile, the latter being sepa- 
rated from the distal laterals in some of the 
larger leaves by a considerable interval of ra- 
chis. Generally, however, the terminal and 
upper laterals are confluent in the rachial re- 
gion to form what, if it were broken away from 
the balance of the leaf, would be considered to 
represent a palmately trilobate leaf such as is 
commonly referred to the genus Aralia. The 
sinuses may be rather broad, narrowly rounded, 
or pointed. The leaflets vary greatly in size, 
shape, and marginal characters but agree in 
being obtuse, generally abruptly and almost 
truncately mucronate pointed. The leaflets 
range in form from narrowly spatulate to 
broadly ovate or obovate. The margins are in- 
variably toothed, but there is great variation in 
the amount and degree to which the teeth are 
developed. Proximally the margins are entire 
for a greater or less distance. Above this en- 
tire portion the teeth, which are remote and 
rather evenly spaced, may be small. and ser- 
rate or very prominent and dentate. Were 
‘not all sorts of gradations present one might 
well doubt that they pertained to the same 
plants. The accompanying illustrations show 
these variations much better than they can be 
described. - The lateral proximal margins of 
the terminal pair of leaflets, except in a single 
specimen, are decurrent on the rachis, extend- 
ing downward to the point of insertion of the 
next lower pair of leaflets and often contin- 
uous with the distal margins of these. This 
rachial wing may be broad and triangular, a 
form which, as the terminal leaflets are the 
largest, gives the leaf a curious unsymmetrical 
or artificial appearance. In other specimens 
the wings are narrow and become reduced to 
mere marginal hems. In the middle pair of 
lateral leaflets the proximal margins are only 
slightly if at all decurrent, and generally they 
are not decurrent. No decurrence has been 
observed in the lower lateral leaflets, but they 
as well as the middle pair have the proximal 
side of the. base fuller than the distal side, the 
former being generally rounded and the latter 
~~ 
