No. 501] THE FLORISSANT EXPEDITION OF 1908 581 



dish in color, with the petiolules provided with small hut 

 very distinct recurved prickles. The leaflets are about 

 48 mm. long and 24 broad, with a cordate base, and the 

 margin with broad rounded teeth or pronounced crena- 

 tions, each about 2.25 mm. long. The principal lateral 

 veins, leaving the midrib at an angle of perhaps 50°, are 

 about seven in number on each side, and are only moder- 

 ately curved. The petiolules differ greatly in length, 

 from 26 to 5 mm., and bear a moderate number of irregu- 

 larly-placed prickles, these being about 2 mm. long. 



Mr. D. M. Andrews, of Boulder, suggested to me that 

 this fossil was Araliaceous, and upon looking the matter 

 up, I felt satisfied that this must be correct. I sent a 

 photograph to Dr. N. L. Britton, who kindly replied: 

 "There is no doubt that the photograph that you send 

 represents some species of Araliaceap, but I am not per- 

 sonally acquainted with anything quite like it. A good 

 many of the woody Araliaceoe have prickles." From the 

 leaf alone, the restricted genus must remain somewhat 

 doubtful, but it may be permissible to refer the plant to 

 Panax, under the name Panax andreivsii n. sp. 



