92 THE FLORA OF THE DAKOTA GROUP. 



Laurus prote^folia Lesq. 



Cret. and Tert. Fl., p. 52, PI. iii, Figs. 9, 10 ; PI. xvi, Fig. 6. Haydeu's Aun. Rept., 

 1874, p. 342, PI. V, Figs. 1, 2. 



Laurus Holl^ Heer. 

 PI. XII, Fig. 8. 



Fl. Foss. Arct., vol. 6, 2 Abth. p. 76, PI. xxxiii, Fig. 13 ; PI. XLiv, Fig. 5b; PI. XLV, 

 Fig, 3 ; vol. 7, p. 30, PI. LXI, Fig. 3. 



Leaves coriaceous, broadly lanceolate, entire ; primary nerve narrow ; 

 secondaries distant, at an acute angle of divergence, arcuate. 



The leaf, which is about 12"'" long, is nearly 4™ broad in the middle, 

 and narrowed in an outside curve to the base, declining to a short petiole 

 13"°"' long. Of the leaves of this species Heer remarks that they are much 

 like those of L. phdoma and L. Odini, but differ from the first by being 

 broader, with secondaries more distant, and that in L. Odini the leaves are 

 broadest below the middle. The difference in the width of the leaves of 

 L. HoUce and L. pliitonia is still more marked . in the American specimens in 

 comparing the Kansas leaf with those of PI. XIII, Figs. 5 and 6. The 

 secondaries are a little more distinctly marked on the leaf from Kansas 

 than upon those from Greenland. They are indeed very distant, but sep- 

 . arated by very thin tertiaries, which are either totally obsolete or only 

 perceivable near the point of attachment to the median nerve, the angle of 

 divergence from the midrib being about 40°. The affinity of the Kansas 

 leaf with that of L. cretacea Ett. (Kreideflora von Niederschoena, PI. ii. 

 Fig. 13) is distinct. This has the nervation better preserved than any of 

 those of L. IIoU(e, showing strong, distant secondaries separated hj thinner 

 ones. The only appreciable difference is in the width of the leaves. 



Habitat : Ellsworth County, Kansas. No. 865 of the collection of the 

 museum of the University of Kansas. Collected by E. P. West. 



Laubus antecedens, sp. nov. 

 PI. XI, Fig. 3. 



Leaf membranaceous, lanceolate, gradually tapering to the apex, 

 narrowed to the base, not decurrent, somewhat curved to one side, entire, 

 irregularly undulate ; median nerve thick ; secondaries oblique, curved, 

 parallel, but of unequal thickness and distance, camptodrome. 



The leaf is 11"'" long, 2..^)''"' broad below the middle, slightly inequi- 

 lateral by the partial contraction of the borders on one side, and is not 



