FLORA OF THE DAKOTA GROUP. 73 



which appear somewhal closer. As the veins are very indistinct the refer- 

 ence is somewhat uncertain. 



Hab. — Near Morrison, Colorado. A. Lakes. Specimen Nos. 13 and 

 13« of the Museum Comp. Zool., of Cambridge. 



Magnolia tenuifolia, Lesqx. 

 "U. S. Geol. Rep./' vi, p 9i, pi. xxi, fig. 1. 



Magnolia obovata, Newby. 



" Later Ext. Fl.," p. 15; "Illnstr.," pi. ii, fig. 2; iv, fig. 4. 



Leaves large, obovate, entire, thick and smooth, pointed and slightly decurrent on 

 the petiole; nervation strong; midrib straight and extending to the summit ; lateral 

 nerves pinnate, set at somewhat unequal distances, straight and parallel below, forked 

 and inosculating above, forming a festoon parallel with the margin; terminal nerves 

 forming an irregular network of polygonal and relatively large areoles. (Newby.) 



Hal. — Blackbird Hills, Nebraska. Dr. Hayden. 



Magnolia species. 



Plate XI, Fig. 6. 



A flattened immature receptacle or carpile of a Magnolia. The short- 

 pediceled cone is oblong-obtuse, covered with short obtuse carpels. 

 Hab. — Near Morrison, Colorado. //. C. BecJcwith. 



LIRIODENDRON, Linn. 



Liriodcndron Meekii, Heer. 

 " Phyll. Cr£t. du Neb.," p. 21, pi. iv, figs. 3, 4. 



Leaves panduriform, emarginate at the top, bilobate; lobes obtuse; secondary 

 veins branching. (Heer.) 



Hab. — Tekamah, Nebraska. Professor Capellini. 



Liriodcndron primaevnm, Newby. 



"Later Ext. FL," p. 12; "Ilhistr.," pi. vi, figs. 6, 7. 



Leaves threelobed, upper lobe emarginate, all the lobes rounded; nervation del- 

 icate, medial nerve straight or slightly curved, terminating in the sinus of the superior 

 lobe; secondary nerves gently arching upward, simple or forked near the extremities, 

 a few more delicate ones alternating with the stronger. (Ny.) 



From comparison of specimens received from Greenland, Professor 

 Heer considers this species, as also the leaves described as Leguminosites 

 Marcouanus, Heer, and Phyllites obcordatus, Heer (Newby., "Illustr.,'' pi. 

 v, figs. 2, 3), as identical with the preceding species. 



