104 THE FLORA OF THE AMBOY CLAYS. 
CELASTROPHYLLUM GRANDIFOLIUM Newb. n. sp. 
Pl. XTX, fie. 8; Pl. XX, figs: 1-4: 
Leaves large, 15°™ to 25™ long, petiolate, lanceolate in outline, rounded 
or subacute at summit, rounded or rarely wedge-shaped at base; margins 
above the base undulate or closely serrate, entire near the base; nervation 
regular, midrib strong, secondary nerves numerous, emerging at an angle 
of 45°, anastomosing and forming a network near the margin; tertiary 
generally at a right angle, ° 
nerve branches leaving the secondary nerves 
dividing the intervening spaces Into a coarse quadrangular reticulation. 
The normal appearance of these leaves is well shown on Pl. XXJ, 
but of the large number which haye been collected some are rounded at 
base and summit, and the margins are almost entire, being slightly undu- 
late in some parts. Such leaves resemble those of some species of Juglans, 
and one of these is shown on Pl. XIX, fig. 8, but they shade into the 
normal form in such a way that they can not be separated. 
These leaves are much like those described by Lesquereux under the 
name of Celastrophyllum ensifolium (Cret Fl, p. 108, Pl. XXI, figs. 2, 3), 
which were found in the Dakota group of Kansas, and it is quite possible 
they are specifically identical; but they are represented as being more cori- 
aceous in texture, having a much stronger nervation, and a base abruptly 
narrowed, with a concave curve; the summit truncated or ‘broadly deltoid- 
pointed.” If these characters should be found to be constant in the Kansas 
leaves they would plainly separate the species, for in those under consid- 
eration the summit is always gradually narrowed and broadly or narrowly 
rounded; the texture also seems to have been much lighter. 
Among the foreign Cretaceous species of Celastrophyllum, this may 
be compared with ©. lanceolatum Ett. (Xreideflora von Niederschoena, p. 
260, Pl. II, fig. 9). But the single figure given by Ettingshausen shows 
the margins to be set with coarse, acute serrations, such as are only very 
exceptionally seen on the margins of our leaves. In other respects the 
resemblance is close, and with more material we may find that the species 
should be united. 
Heer, in his Flora Fossilis Arctica (Vol. VII, p. 40, Pl. LXIV, fig. 9a; 
Pl. LXY, figs. 7, 8), gives figures of three imperfect leaves which he refers to 
