[berry-johnston] pleistocene INTERGLACIAL DEPOSITS 139 



in the existing flora of the western part of North America. The 

 fossil appears to be most like the modern Arctostaphylos manzanita 

 Parry, a chaparral shrub of the Coast ranges of California and a 

 member of the flora of the Upper Sonoran Zone. 



Kalmia glauca Ait 



Fig. 7 



The modern form is a low shrub of the humid transition zone of 

 the Columbian region, and grows in bogs from Alaska to Labrador, 

 and southward to New Jersey on the Atlantic coast ; to Michigan and 

 Colorado in the Interior; and along the Sierra Nevada to California 

 on the Pacific coast. 



Chamaedaphne calyculata (Linné) Moench 



Fig. 8 



These fossil leaves were coriaceous with re volute margins. In 

 the existing flora the species is a shrub, 2 to 4 feet tall, an inhabitant 

 of bogs and swamps from Newfoundland to Alaska, and ranging 

 southward to the mountains of Georgia in the east; to Illinois and 

 Michigan in the Interior; and to British Columbia on the Pacific coast. 



Vaccinium ovalifolium J. E. Smith 



Fig. 9 



The modern form is a shrub, from 3 to 12 feet tall, of shaded 

 woodlands. It occurs from Quebec to Michigan, Oregon, and Alaska, 

 and is also found in Japan. This range suggests that the species is 

 one of considerable antiquity, since the present day means of dispersal 

 would not permit the exchange of Temperate Zone forms between 

 Asia and North America. 



