168 MESOZOIC FLORAS OF UNITED STATES. 



Order GINKGOALES. 



Family GINKGOACEiE. 

 Genus BAIERA Friedrich Braun. 

 Baiera geacilis (Bean) Bunbury. 



PL XLIV, Fig. 2. 



1843. ScTiizoftei'is gracilis Bean in Morris: Cat. Brit. Foss., p. 20 (from Bean's manu- 

 script) . 



1849. Baiera sp. Brongn. : Tableau, p. .38 (fide Bunbury: Quart. Journ. Geol. Soc. 

 London, Vol. VII, p. 182). 



1851. Baiera gracilis (Bean) Bunbiu-y: Quart. Journ. Geol. Soc. London, Vol. VII, 

 p. 182, pi. xii, fig. 3. 



1865. Cyclopteris gracilis (Bean) Zign.: Osserv. sulle Felci Foss. deU'Oolite, p. 22. 



1878. Schisopteris digitata Willn. [non (Brongn.) Gein.] in Saporta: Plantes Juras- 

 siques. Vol. Ill, pp. 277, 279. 



1902. Baiera gracilis (Bean) Bunb. Schrader: Bull. Geol. Soc. Am., Vol. XIII, 

 p. 245. 



In the collection made by Mr. Schrader there is a single specimen 

 that agrees exactly with Baiera gracilis (Bean) Bunb. It shows a por- 

 tion of a long petiole which bears at its summit two equal segments. 

 These divide dichotomously into several narrow laminae, which are 

 preserved for only a portion of their length. The specimen shows espe- 

 cially a striking resemblance to the figure of this Baiera given by Seward 

 in his Jurassic Flora of the Yorkshire Coast, pi. ix, fig. 5. It resembles 

 B. Muensteriana (Presl) Heer of the Rhetic formation, and Seward 

 points out the resemlDlance of some of the forms of B. gracilis to that 

 plant. 



Genus GINKGODIUM Yokoyama. 



GiNKGODiUM ? ALASKENSE Fontaine. 



PI. XLF^, Figs. 3, 4. 



1888. Baiera palmata Heer. Lesquereux: Proc. U. S. Nat. Mus., Vol. XI, p. 31, 

 pi. xvi, fig. 5. 



Two fragments of peculiar leaves occur in the collections, one in 

 the collection of Mr. Woolfe and one in that of Mr. Dumars. The speci- 

 men found by Mr. Woolfe was determined by Lesquereux as Baiera 



