438 BOTANICAL GAZETTE [December 



<** 



reduced terminal lobe. It may be Platanoid, Cissoid, or Aralioid, 

 but is hardly a Sassafras leaf. If the reference of leaves from 

 the Cheyenne sandstone to this species be correct, it had a con- 

 siderable range in time, extending from the Lower into the 

 Upper Cretaceous. 



Sassafras cretaceum recurvatum Newb. — Three to five- 



lobed subcoriaceous leaves ; primaries branching from the mid- 

 rib in the decurrent base, borders undulate ; resembling the 

 Araliaceae in the tendency to become five-lobed, Newberry's 

 and Lesquereux's figures ^^ agree with each other and differ from 

 those of 5. cretaceum^ of which Newberry considers them a 

 variety in the craspedodrome venation, and the tendency of 

 the lobes to become sub-lobate or undulatory, a tendency quite 

 pronounced in Lesquereux's specimens cited. Lesquereux's 

 third figure '7 differs in being distinctly trilobate with campto- 

 drome venation, and greatly resembles in outline the leaves 

 which he refers to 5. cretaceum. It also resembles his S. mira- 

 bile, being, however, fuller in its basal half. The typical forms 

 of this species '^ are closely related to some of the forms of 

 Platanus latior and P. Heerii in the undulate margins and the 

 strong development of the secondary branches from the 

 midrib '9 and undoubtedly should be referred to Platanus. 



Sassa-fras Leconteanum Lesq. — This name embraces leaves 

 from the Dakota Group at Fort Harker, and remains doubtfully 

 ascribed to Nanaimo, Vancouver island. Schimper^** says of 

 them, *'Lauraceae, but doubtful Sassafras." Lesquereux*^ says 

 their '* relation is with the European Tertiary Benzoin, and the 

 existing Nectandra and Lindera." While modern opinion places 

 them in the genus Persea, I am disposed to follow Heer in con- 

 sidering them a species of Magnolia; they are certainly not 

 Sassafras. 



Sassafras acutilobum Lesq.— The leaves from the Amboy 



'^Cret YVpL 10. figs. 4-3. '^ Cret. Fl. //. 10. fig. 3. 



*8Newberry, Later Ext. Fl. N. A.,//, g.fig 2, and Lesquereux, Cret. Fi. //• ^o, 



'9 Compare with Cret. Fl. //. y.fig. 2; pL 8. fig. 4; pL g.fig. /. 



2Q 



Pal. Veg. 2 : 836. »>Cret. Fl. p. 75. 



