71 



p 



ADDITIONAL NOTES. 



QuERCUs Kelloggii, Newberry. In the various descriptions of this oak nothing is 

 said of any pubescense. This silence is the equivalent of saying that the twigs and foliage, 

 in their mature state at least, are glabrous ; but they are not always so. On the southern 

 slope of Mt. St. Helena, in September, 1888, I observed certain young trees of this species, 

 whose foliage, certainly at that date quite mature, was cinereous or perhaps more nearly 

 hoary, with a white tomentum. 



In respect to the outline and lobing of the leaves, the species exhibits many diversities, 

 as also in the size of the acorns and the depth of the cup ; and in some parts of California 

 good amateur observers recognize what they suppose to be two distinct oaks different in 

 habit as well as in leaf-outline growing promiscuously, but which botanists call alike Q. 

 Kelloggii. Very probably several varieties may have to be distinguished and supplied 

 with names. 



QuERCUS MoREHus, Kellogg. At page 47 preceding I have said that Q. Kelloggii 

 does not occur in the range of hills lying back of Oakland and Berkeley ; and that having 

 found Q. Morehus in these hills, the probability of its being a hybrid between Q. Kelloggii 

 and Q. Wislizeni \% reduced to a minimum. 



A further exploration of the more northerly continuation of the Berkeley Hills has 

 now brought to light a plentiful growth of Q. Kelloggii on the banks of the upper part of 

 San Pablo Creek ; and this at a distance of not more than two miles from where I had 

 formerly found Q. Morehus and Q. Wislizeni growing in stunted condition, and forming 

 thickets side by side. I have also discovered near the San Pablo habitat of Q. Kelloggii.^ 

 one large tree of Q. Morehus. I have also noted that the leaves are scarcely found quite 

 the same in shape on any two trees of the species last mentioned. I therefore conclude it 

 must be of the nature of a hybrid. By its persistent leaves it seems as if it partook more 

 of the nature of its evergreen than of its deciduous parent. 



