416 Berry: MEsOozoIC FLORA OF ATLANTIC COASTAL PLAIN 
While it may be considered probable that from a biologic 
viewpoint the forms mentioned in the foregoing paragraphs, as 
well as others not cited, represent the variations of a single species 
of Upper Cretaceous tree, or at least represent the leaves of closely 
affiliated species, it seems best from the viewpoint of systematic, 
and especially stratigraphic, paleobotany, that most of the dif- 
ferentiations instituted by Lesquereux be perpetuated. Conse- 
quently the present species is limited to the typical materia! as 
defined and illustrated by the original describer. 
Falling within these limits are a number of unrecorded speci- 
mens occurring in the Raritan formation of Maryland. 
OccURRENCE: Bull Mountain and Shannon Hill, Cecil County, 
Md.; East Washington Heights, District of Columbia. 
CoLLections: Maryland Geological Survey, U. S. National 
Museum. 
Araliopsis cretacea dentata (Lesq.) 
Sassafras (Araliopsis) cretaceum dentatum Lesq. Ann. Rept. U. S. 
Geol. and Geogr. Surv. Terr. 1874: 344. 1876. Cret. Fl. pl. 
TH fete. 
DESCRIPTION: This variety may be ie Car ne from the type 
by its usually smaller size and by its dentate m 
OcCURRENCE: A characteristic specimen is ane in the col- 
lections from the Raritan formation at Bull Mountain, Cecil 
County, Md. 
Araliopsis cretacea salisburiaefolia (Lesq.) 
Populites salisburiaefolia Lesq. Amer. Jour. Sci. II. 46:94. 1868. 
Sassafras obtusus Lesq. Fifth Ann. Rept. U. S. Geol. Surv. Terr. 
(Hayden) 1871: 303. 1872. 
Sassafras obtusus Lesq. Sixth Ann. Rept. U. S. Geol. Surv. Terr. 
(Hayden) 1872: 424. 1873. 
Sassafras obtusum Lesq. Cret. Fl. 81. pl. 13. f. 2-4. 1874. 
Sassafras (Araliopsis) cretaceum obtusum Lesq. Cret. Fl. 80. pl. 12. 
f.3; pl. 13.f.1. 1874. Mon.U.S.Geol. Surv. 17: 102. 1892. 
Cissites obtusum Lesq. Eighth Ann. Rept. U. S. Geol. Surv. Test. 
(Hayden) 1874: 354. 1876. 
Sassafras (Araliopsis) obtusum Lesq. Cret. and Tert. Fl. 56. 1883. 
Cissites salisburiaefolius Lesq. Cret. and Tert. Fl. 66. 1883. 
