no. 2074. STUDIES ON FOSSIL FLORA— BERRY. 301 



Order UMBELLALES. 



Family CORNACEAE. 



Genus NYSSA Linnaeus. 



NYSSA SYLVATICA Marsh. 



Leaves of this species, which apparently has not hitherto been 

 recorded from the Pleistocene, were collected at Hickman. In the 

 existing flora it is often confused with Nyssa Mflora Walter, and the 

 latter species is of frequent occurrence in the late Pleistocene (Talbot 

 formation and its equivalents) from New Jersey southward. Nyssa 

 sylvatica is a low woods and swamp type ranging from Maine and 

 Michigan southward to Florida and Texas. 



Order ERICALES. 

 Family ERICACEAE. 



Genus XOLISMA Rafinesque. 



XOLISMA LIGUSTRINA (Linnaeus) Britton. 



Plate 12, fig. 1. 



Xolisma ligustrina (Linnaeus) Britton, Hollick, Md. Geol. Surv., PH. and 

 Pleist., p. 236, 1906, pi. 69, fig. 6.— Berry, Journ. Geol. vol. 15, 1907, p. 346; 

 Amer. Nat., vol. 41, 1907, p. 696, pi. 2, fig. 6; Amer. Journ. Sci, ser. 4, vol. 29, 

 1910, p. 398. 



This species, represented by leaves in the Hickman Bluff, has been 

 previously recorded from the late Pleistocene of Maryland, North 

 Carolina, and Alabama. In the existing flora it is an inhabitant of 

 swamps and wet places ranging from New England to Florida and 

 west to Arkansas, so that its fossil occurrence at Hickman is north of 

 its present northern limit in the Mississippi Valley. 



Order GENTIANALES. 



Family OLEACEAE. 

 Genus FRAXINUS Linnaeus. 



FRAXINUS AMERICANA Linnaeus. 



This species has apparently not been found before in the fossil 

 state. It is represented by leaves at the Hickman Bluff. In the 

 existing flora it ranges from Nova Scotia to Minnesota and southward 

 to Florida and Texas. Its habitat is rich, usually moist woodland near 

 streams, and it is said to reach its maximum size in the bottom lands 

 of the lower Ohio River. 



