( x 97) 



with J^. berbcridifolia Liebm. In the latter supposition he 

 was led astray by Alphonse DeCandolle, who cites Wright's 

 no. 1868 as belonging to that species. DeCandolle had not 

 seen the type of Liebman's ££. berbcridifolia, which was 

 collected by Thomas Coulter; he had seen a specimen col- 

 lected by Fremont, but if this was the one mentioned by 

 Liebman or not, is impossible to say ; DeCandolle himself 

 saw the discrepancies, and points out the differences between 

 Liebman's description and Wright's specimens. ££. turbi- 

 nella is evidently the same as J%_. berberidifolia A. DC, in 

 part; but scarcely as that of Liebman. j^. turbinella is re- 

 lated to J^. pungens, differing in the small, flat, thicker leaves, 

 fulvous when young, in age only sparingly stellate-puber- 

 ulent beneath ; they are spiny-toothed as in J^. pun gens but 

 only 1-3 cm. long. The fruit is also different; the cup is 

 very shallow, somewhat turbinate or depressed-hemispher- 

 ical, about 8 mm. in diameter; the acorn is much elongated 

 for its size, 15-20 mm. long and tapering at the apex. The 

 only figures in Sargent's Silva that can be referred to this 

 species are that of a fruit, viz., PL 393, Fig. 8, and the leaves 

 on PI. 385, Fig. 10-12. 



Sargent's ££. undulata contains therefore seven species all 

 as distinct as his own J^. Arizonica and J^. Tourney i and sev- 

 eral much easier to distinguish, for 4L- Arizonica as far as 

 leaf-form is concerned grades into J^. reticulata on one hand 

 and J^_. grisea on the other, and J^. Tourney i is hard to sepa- 

 rate from J^. dumosa. 



The remaining species of the region, viz., J^. oblongi folia, 

 ^ Arizonica, J^. reticulata, £>. Toumeyi, Q Emoryi, Jj>. 

 hypoleuca and Jt>. chrysolcpis have been treated much better. 

 I think, however, that the varieties under the latter are dis- 

 tinct species and that the Arizona-New Mexico plant is dis- 

 tinct from those of California. 



Professor Greene's treatment of the oaks was in my opinion 

 much more logical, notwithstanding the fact that at the ti 

 the West American Oaks was written the western oaks were 

 much less known than now and perhaps not one-fourth the 



