94 THE LATER EXTINCT FLORAS OF NORTH AMERICA. 



Order MAGNOLIACE^. 



Magnolia alteenans Heeri 

 PI. V, fig. 6. 



Nouv. Mem. Soc. Helv. Sci. Nat., Vol. XXII (1866), p. 20, PI. Ill, figs. 2-4; IV, 

 figs. 1, 2. 



Note. — So identified, provisionally, by Dr. Newberry, as indicated by memo- 

 randum on margin of plate. Locality probably Blackbird Hill, Nebraska. — A. H. 



Magnolia elliptica Newb. n. sp. 



PI. XII, fig. 1. 



Leaf 6 inches long by 3£ inches broad, elliptical in outline, rounded 

 at the base, acute at the summit; midrib strong and straight; lateral 

 nerves numerous, strong, nearly simple, arched upward, parallel, inoscu- 

 lating near margin (camptodrome). 



Collected by Dr. F. V. Hayden. 



Among described species, this approaches nearest to M. Hilgardiana 

 Lesq. of the Tertiary of the Mississippi, but is shorter, broader, more 

 rounded at the base, and more abruptly pointed at the summit. 



There is some doubt in regard to the age of the strata from which this 

 plant was derived, and it is possible that it is tertiary and is but a phase 

 or variety of the species with which it has been compared. 



Formation and locality: Tertiary (Eocene?). Tongue River, Montana. 



Magnolia obovata Newb. 



Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 15. 



"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; tertiary nerves forming an irregular 

 network of polygonal and relatively large areoles." 



Note. — As may be seen by comparing the descriptions, this species is mani- 

 festly identical with the one described by Dr. Newberry under the name Nyssa 

 vetusta (see p. 125 of this monograph), and inasmuch as the latter name has priority 



