(226) 



Illustrations: PL 32. f. 6; Garden & Forest, 8: pi. 

 13, 14; Sargent, Silva N. Am.//. 391. 



26. Quercus turbinella Greene, West Am. Oaks 1 : 37 



& 2 : 59. 1889-90. 



jgiiercus berbcridifolia A. DC. Prod. 16 2 : 36, in part. 

 1864. Scarcely Liebm. 



Jgiiercus Emoryi Torr. Mex. Bound. Surv. 206, in part. 

 1859. Engelm. Wheeler's Rep. 6 : 250. 1878. 



J^iiercus undulata o Wrightii Engelm. Trans. St. Louis 

 Acad. 3: 282, in part (?). 1876. 



jgitercus undulata Sargent, Silva 8: 75, in part. 1895. 



A shrub 1-3 m. high. Bark of the stems and branches 

 dark brown or dark gray, that of the young branchlets covered 

 with a white stellate pubescence and when young with ful- 

 vous tomentum : petioles 2-3 mm. long : leaf-blades oblong, 

 elliptic, oval or rarely ovate, 1-3 cm. long, obtuse or cordate 

 at the base, acute at the apex, usually sinuate-dentate with 

 spinulose-tipped teeth, when unfolding covered with a fulvous 

 tomentum ; upper surface in age light bluish green and shin- 

 ing ; lower surface strongly reticulate, fulvous, stellate-pu- 

 bescent, or when very old occasionally glabrous : cup hemi- 

 spheric, usually more or less turbinate at the base, 8-10 mm. 

 in diameter; scales deltoid-ovate, obtuse, moderately corky- 

 thickened on the back especially those at the base ; acorn 

 elongated-ovoid, acute, 15-20 mm. long, 8 mm. in diameter. 



Professor Sargent refers J^. turbinella partly to J<>. undu- 

 lata and partly to J^. dumosa, from both of which the species 

 is easily separated by the fulvous tomentum, the turbinate 

 cup and the small elongated-ovoid acorn. The type of J^. 

 turbinella matches exactly Wright's no. 1868. The latter 

 was a part of Jt>. berbcridifolia in DeCandolle's Prodromus, 

 but it is scarcely J^. berberidifolia of Liebman, for there are 

 several discrepancies. Liebman's figure illustrates a plant 

 with larger leaves and his description states that the leaves 

 are " subtus pruinoso-glauscentia " and that the cups are " de- 

 presso-hemisphaerica." DeCandolle also points out these 

 discrepancies ; he had evidently not studied Liebman's type or 

 any authentic specimen and does not claim to have done so. 



