no THE RARITAN FLORA. 



could have been derived. It would seem that the conclusion is 

 reasonable that these are the nonnal leaves of the earliest known 

 Comptonias, and that the modern seedling leaves are truly ata- 

 vistic. 



The remains of this species are scanty, the Raritan occurrence 

 being based on a single specimen, and all are very similar to the 

 contemporaneous Comptonia antiqua Nilsson, described about 

 seventy-five years ago from Sweden. 



Occurrence. — Sayreville. 



Collections. — N. Y. Botanical Garden. 



Order JUGLANDALES. 



Family JUGLANDACE^. 



Genus JUGLANS Linne. 

 (Sp. PI, 1753, P- 997-) 

 JUGLANS ARCTICA Heer. 



Juglans arctica Heer, Fl. Foss. Arct., vol. 6, Ab. 2:71, pi. 40, f. 



.2; pi. 41, f. 4c; pi. 42, f. 1-3; pi. 43, f. 3, 1882. 

 Lesq., Fl. Dak. Group, 68, pi. 19, f. 3; pi. 39, f. 5> 1892- 

 Newb., Fl. Amboy Clays, 62, pi. 20, f. .2, 1896. 

 Hollick, Ann. N. Y. Acad. Sci., vol. 11 : 58, pi. 3, f. 7, 1898. 

 Berry, Ann. Rep. State Geo'l. (N. J.) for 1905; 139, pi. 21, 



f. I, 1906; Bull. Torrey Club, vol. 33: 170, 1906. 

 HoUick, U. S. Geol. Survey. Mon. 50:54, pi. 9, f. 6-8, 



1907. 

 Ficiis afavina Hollick, Trans. N. Y. Acad. Sci., vol. 11 : 103; pL 



4, f. 5, 1902. 



Description. — "I mice ovali, 34 mm. longa, 17 mm. lata; foliis 

 magnis, foliolis ovalibus, basi insequilateralibus, integerrimis*, 

 nervo medio valido, nervis secundariis angulo semirecto egre- 

 dientibus, curvatis." Heer, 1882. 



The leaves of this species vary considerably in size and outline, 

 which might be expected in the present genus. Heer's type ma- 



