Plate XII. 



Figure I of this plate represents Quercus dumosa^ apparently the variety bullata of 

 Englemann. The specimen was furnished by Professor Davidson, and is said to have been 

 brought from San Rafael. 



Figure 2, figure 3 probably belonging with it, is of Quercus Douglasu \n a somewhat 

 anomalous condition as to the large winter buds, the scales of which are in five ranks, 

 making the bud not indistinctly pentagonal. The specimen was obtained near Antioch, 

 in the month of October. If the acorns (fig. 3) belong here, they are very small for the 

 species. Dr. Kellogg has recorded, in pencil on the back of his drawing, a doubt as to its 

 being Q. Douglasii. One might guess, from the plate, that the buds were those of some 

 evergreen oak, swollen by the influences of spring. The type specimens, however, indicate 

 nothing of the kind. The label bears the date " Oct ;" and I ought, in justice to the whole 

 subject, to say that in the dried specimen the buds are rather broader, and a mere trifle 

 shorter than the drawing indicates. 



Figure 4 is a leaf-bearing twig of quite normal Q. Douglasu; and 5, probably a some- 

 what aberrant form of the same species, the leaves being more cuneate at base, and more 

 obovate in outline than usual. 



