CRETACEOUS FLORA. 19 



Dewalquea. Saplnd s] 



The leaflet is also related, though in a less degree, to D. greenlandica Heer, a species 

 found at divers localities and stages of the Cretaceous of Greenland. 



Hab. North side of the Big Cottonwood river, near New Ulm, Minnesota. 

 Mm. Reg. No. 5158. 



JUGLANS DEBEYANA (Heer) Lesqx. 



PLATE B. FIG. 7. 



Pvpulus debeyana Heer, Phillites du Nebraska, p. 14, Pl.l,f.l. Newby., Ext. Fl., p. 17, Illustr. PI. IV, 

 f. ,;. Jugluns(?) debeyana Lx., Cret. FL, p. 110, PI. XXIII, f. 1-5. 



Leaves coriaceous, entire, ovate, obtuse or with a short obtuse point ; rounded subcordate 

 at the base or narrowed by a curve and slightly decurring to the petiole ; medial nerve thick ; 

 secondaries numerous, open, camptodrome, generally separated by short tertiaries ; areola- 

 tion reticulate. 



This species is not rare in the red sandstone of Kansas and Nebraska. Prof. 

 Heer, who had seen a single large specimen with the surface somewhat effaced, 

 referred it with doubt to the genus Populus. The nervation is indeed too different, 

 and, as seen from a large number of specimens, some of which are figured, Cret. PI. 

 /. c., the leaves, rarely large, cordate at base and long petioled, are more generally 

 small or of various sizes, 4 to 12 cm. long. 3| to 7 cm. broad, narrowed to the base 

 and often inclined on one side like leaflets of compound leaves. For this reason I 

 referred them to Jualans. The nervation is peculiar, the secondaries close, parallel 

 at an angle of 50 to 60 are camptodrome abruptly curving and forming arches 

 along, but not quite near the borders, separated by short tertiaries which, by anas- 

 tomosing on both sides with secondaries and irregularly dividing in the middle, form 

 a quadrangular very distinct reticulation more analogous to that of some species 

 of Juglans, like J. latifolia Heer, Fl. Tert. Helv., Ill, p. 88, PI. CXXIX, f. 3, 6, 9. 



Hub. North side of the Big Cottonwood river, near New Ulm, Minnesota. 



Mus. Beg. No. 5373. 



i 



SAPINDUS MORRISONI Lesqx. 



PLATE A, FIGS. 11. I'.'. 



Cret. and Tert. FL, PL XVI, f. 1, .'. 



Leaflets subcoriaceous, short petioled, lanceolate, acuminate, unequally narrowed in a 

 curve to a short petiole and slightly decurring to it ; lateral nerves alternate, close, parallel, 

 curving in passing to the borders, camptodrome. 



The leaves vary in width and are sometimes ovate, as in fig. 12, sometimes, also, 

 nearly linear in the middle, as in fig. 11, but always unequal at the base. 



