358 



ANNUAL REPORT SMITHSONIAN INSTITUTION, 1918. 



have extended beyond the known range of Ginkgo in South America, 

 South Africa, and New Zealand. It is evidently a waning type 

 during the Upper Cretaceous and becomes entirely extinct before 

 the close of that period. Ginkgo, on the other hand, has been found 



Fig. 22. — Views of different species of Baiera. 



1. Baiera muensteriana Heer. Kinetic of Baireuth (after Schenk): 



1. leaf. 



la. unripe microsporophylls. 



lb. ripe microsporophylls. • 



2. Baiera raymondi Renault. 1'ermian of France (after Zeiller). 



3. Baiera angustiloba Heer. Jurrassic of Siberia (after llccr). 



4. Baiera pulchella Heer. Jurassic of Amur Land (after Heer). 



5. Baiera microsporophylls. Upper Triassic of Switzerland (after Leuthardt). 



6. Baierafurcata Heer. Upper Triassic of Switzerland (after Leuthardt). 



7. Baiera foliosa Fontaine, x 5. Lower Cretaceous of Virginia (after Berry). 

 S. Same, showing short shoot (after Berry). 



in the Tertiary of Greenland, North America, Europe, and Asia, the 

 characteristic Ginkgo adiantioides being abundant and scarcely dis- 

 tinguishable from the still existing species. The latter, long thought 

 to be extinct except as preserved by cultivation in the temple gardens 

 of China and Japan, has recently been reported in a wild state in 



