170 MESOZOIC FLORAS OF UNITED STATES. 



Genus GINKGO Kaempfer. 



Ginkgo digitata (Brongniart) Heer." 



PI. XLIV, Figs. 5, 6. 



Several specimens of a Ginkgo occur in the collection of Mr. Dumars, 

 which in general character agree well enough with Ginkgo digitata to 

 be placed in this species. The leaf represented in PL XLIV, Fig. 5, 

 probably had a somewhat different form from that now shown. It 

 is mutilated at the summit and slightly distorted at base. The free 

 ends of the lobes appear truncated, iDut this may be due to the removal 

 of the tips in splitting the rock. This leaf has four divisions and evi- 

 dently had originally no more. They are irregular in width, and three 

 of them are considerably wider than the lobes of the leaf collected by 

 Mr. Woolfe and figured by Lesquereux in his paper, pi. xvi, fig. 6. This 

 leaf is also less deeply divided and a portion of a stout petiole is shown. 

 Another specimen, more imperfect than these, gives a transition from 

 the one to the other. This is shown in PI. XLIV, Fig. 6. 



Ginkgo Huttoni (Sternberg) Heer.'' 



1888. Ginkgo multinervis Heer. Lesquereux: Proc. U. S. Nat. Mus., Vol. XI, p. 31, 

 pi. xvi, fig. 6. 



One specimen probably belonging to this species occurs in Mr. 

 Woolfe's collection. Lesquereux identified it with Ginkgo multinervis 

 Heer from the Cenomanian beds of Atane, Greenland. It has three 

 almost entire partitions, with a fragment of a fourth on the right side. 

 It is, however, obviously incomplete on this side and had at least one 

 more lobe. The leaf is divided almost to the base, and the divisions 

 are obtuse at the free ends, elliptical in form, and narrow to a wedge 

 shape at the base. The dimensions of this specimen agree very well 

 with those of G. Huttoni. 



Ginkgo Huttoni magnifolia Fontaine?'' 

 PI. XLIV, Figs. 7, 8. 



In Mr. Dumars's collection there are several imprints of fragments 

 of very large Ginkgo leaves that must have much surpassed in size any 



n For the full synonymy of this species see pp. 121-122. — L. F. W. 

 b For synonynay of this species see p. 123. — L. F. W. 

 « See p. 124. 



