848 SYSTEMATIC PALEONTOLOGY 



Description. Leaves of variable size and form, in general ovate to 

 lanceolate in outline, with a sharply pointed apex and decurrent base. 

 Length ranging from 9 cm. to 15 cm. Maximum width, usually in the 

 middle part of the leaf, ranging from 2 cm. to 5 cm. Petiole stout. 

 Midrib stout and slightly nexuous, prominent. Secondaries numerous, 

 camptodrome, their angle of divergence and subsequent course dependent 

 on the shape of the individual leaves ; in general they diverge at an acute 

 angle and are ascending. Texture coriaceous. 



These leaves exhibit a wide range of variation, some forms being 

 entire and lanceolate, with the margins but slightly undulate. Usually 

 these undulations are pronounced, one or more on either one or both sides 

 of the lamina becoming emphasized to form a pronounced constriction. 

 These sinuses are sometimes rounded, more often they are sharply pointed 

 and extend about half-way to the midrib. These constrictions may be in 

 the apical, median or basal region. Usually they are above the middle 

 and divide the leaf into a lower ovate portion and an upper linear- 

 lanceolate portion. 



This species, which is the type of the genus, was described by Velenovsky 

 (in Bohemian) in 1889 from the Cenomanian of Vyserovic, Bohemia, and 

 compared with existing species of Croton, some of which it greatly 

 resembles. It remained the only species until recently when the writer 

 described 1 the closely related Crotonophyllum pandurceformis from the 

 Middendorf beds of South Carolina and the Tuscaloosa formation of 

 Alabama. A previously described form which while much smaller is 

 otherwise quite similar to the widest Maryland specimen is Cinnamomum 

 membmnaceum (Lesquereux) Hollick. 2 



The genus is also represented in the Lower Eocene flora of the Mis- 

 sissippi embayment. 



Occurrence. MAGOTHY FORMATION. Grove Point, Cecil County. 



Collection. Maryland Geological Survey. 



1 Berry, Prof. Paper U. S. Geol. Survey, No. 84, p. 48, pi. vii, figs. 5-10, 1914. 

 3 Hollick, Mon. U. S. Geol. Survey, vol. 1, 1907, p. 75, pi. xxix, figs. 5, 6. 



