SEQUOIA SEMPERVIREINS. 17I 



In order to be sure that this was a universal and not a 

 local characteristic, it was necessary to examine many 

 trees in different localities. Besides the trees in Sequoia 

 Canon, I examined trees in Santa Cruz County, at Wright's 

 and at Boulder Creek, and in Sonoma County at Duncan's 

 Mills. At Boulder Creek the woodchoppers were at work 

 destroying the forest, and I had an opportunity to exam- 

 ine many trees from the topmost to the lowest branches. 

 Fine specimens were sent from Mendocino, Humboldt 

 and Sonoma counties, in response to a request for branches 

 from different trees and different parts of the same tree, 

 also information concerning the size and location of the 

 trees from which the specimens were obtained. With- 

 out any exception, the large trees — two, three or more 

 feet in diameter — possessed heteromorphic foliage. Many 

 small trees, a foot or so in diameter, were seen that had 

 only the broad distichous leaves. There are always scale 

 like leaves on young upper shoots; but on young trees 

 they afterwards generally expand into the broad leaves. 

 (Plate XV, fig. 2.) 



From all these observations I conclude that all large 

 trees of Sequoia senipervirens have the upper foliage quite 

 different from the lower, with intermediate forms. This 

 is not true of Sequoia gigantea, so far as my observation 

 goes. 



Among the forty or more fossil species of Sequoia de- 

 scribed from the Northern Hemisphere it is interesting to 

 note that the foliage of several species has been found to 

 be heteromorphic. Of Sequoia biforniis, Lesquereux, the 

 author, says: "This species apparently bears two kinds 

 of leaves even upon the same specimens, either long 2 

 cm. and very narrow linear, less than i mm. wide; or 

 shorter and broader, decreasing gradually from the base 

 to the point, linear -lanceolate nearly i;^ mm. wide and 



