THE SEQUOIAS OR BIG TREES 49 



lithographs against the background of dove-colored clay. This 

 species, which is known as Sequoia Reichenhachi, had cones almost 

 exactly like those of the living Cahforhia big tree, and the foliage 

 was somewhat similar. It was a very wideranging form both in 

 this country and Europe, and is considered to have been the source, 

 in part at least, of the amber which is so common in the Cretaceous 

 of the Atlantic Coastal Plain, 



A number of other fossil species of sequoia show an equally wide 

 range. One of these has an appearance so much like its descendent 

 the existing redwood that I have not figured the fossil, which is 



Fig. 7. Cone-bearing Twig of a Widespread Cretaceous Big Tree, 

 Sequoia REiciiENBAcm (About § Natural Size) 



known as Sequoia Langsdorfii. Its leafy two-ranked twigs and 

 small cones have been found almost everywhere throughout the 

 Northern Hemisphere where plants beds occur, and it ranges pretty 

 well through Tertiary time, its range, both chronologically and 

 geographically being greater than that of any other known sequoia. 

 Another very abundant Tertiary form, also widely spread is Sequoia 

 CouUsii, which is shown in the accompanying illustration. It is 

 of especial interest because of its pecuhar foliage, and also from 

 the fact that only recently has it been definitely proved to be a 

 true sequoia in the face of considerable botanical differences of 

 opinion. 



