GINKGOALES. . loi 



Jurassic. It continued into the Cretaceous, but is much reduced 

 in numbers and importance, a single form occuring in the Lower 

 Cretaceous. 



Occurrence. — Woodbridge. 



Collections. — N. Y. Botanical Garden. 



Genus CZEKANOWSKIA Heer. . 

 (Fl. Foss. Arct., vol. IV, ab. ii, 1876, p. 70.) 



CzEKAXOWSKIA CAPILLARIS Newb. 



Czekanozvskia capillaris Newb., Fl. Amboy Clays, 61. pi. 9, f. 

 14-16, 1896. 

 Smith, Geol. Coastal Plain in Ala., 348, 1894 (Nomen 

 nudum.) 



Description. — Leaves linear or capillary, long and slender, un- 

 divided ( ?) or dichtomously forked. Length 8 cm. to 10 cm. 

 Judging by the extremely poor material at our command they 

 grew in bundles and were apparently caducous. 



The genus was established by Heer in 1876. and its relations 

 have caused considerable discussion, some authors comparing it 

 wdth Isoetes. Both Schenk and Seward, from the stomatal char- 

 acter, place the genus among the G}aTinosperms. Among the 

 latter it falls most naturally in the order Ginkgoales, although 

 this relationship is disputed in some quarters. It is essentially 

 a Jurassic type, appearing, however, in the Rhaetic and surviving 

 as late as the Upper Cretaceous, apparently becoming extinct m 

 the Cenomanian, the European Czekanozvskia nervosa Heer, 

 which is recorded by Fontaine^ from the Lower Cretaceous of 

 the Black Hills, ranging from the Aptian through the Albian 

 into the Cenomanian of Portugal. 



Occurrence. — W^'oodbridge. 



Collections. — N. Y. Botanical Garden. 



' Fontaine, Ann, Rept. U. S. Geol. Surv. 19th, pt. 2, 1899, p. 685. pi. i&j. f. 

 I, 2. 



