54 BOTANICAL GAZETTE [JANUARY 
of Q. Phellos, but did not go wide enough to show duplicates of those 
of the other parent as described and figured by Dr. Britron (Bull. 
Torr. Bot. Club 9:13. 1882). The acorns likewise ranged from the 
form near that of Q. Phellos toward Q. marylandica, but included 
none that might be mistaken for the latter. The bark of the vari- 
ous individuals, on the other hand, seemed most like O. marylandica, 
although much variation was apparent (fig. 4). 
During the visit of 1905 acorns were 
found on trees of some of the types only, 
and material capable of germination was 
obtained from three of them. When these 
were at the end of the first year’s growth, 
which began in the propagating houses 
in January 1906 and ended in September, 
it was seen that the progenies of the three 
parents, selected for their dissimilarity, were 
fairly identical; and while a wide range of 
variability was found, this range did not 
exceed the limits of similar fluctuations 
offered by other species of oaks which are 
known to be unified hereditary strains. 
Over a hundred plantlets were carried 
through the first season, but no leaf-forms 
were exhibited which might be taken to 
; simulate either of the supposed ancestors, 
taken from tree at Cliffwood, ‘ . 
i. fy Moe which inate wee although a comparative culture of seedlings 
taken for cultures.— x}. of these might have brought some resem- 
blances to light. The advanced stages, 
however, may modify this aspect of the progeny materially. Some of 
the trees examined bore only imperfect acorns, and the proportions 
incapable of germination taken from all of the individuals was 
large. This and other facts suggests a more widely unbalanced 
cross than in the case of Bartram’s oak, and it is quite possible that 
the dissimilarity may be so great that a finely graded series or @ 
total series may be impossible in the actual combinations effected. 
As the facts now stand, however, the observations have not given 
any actual proof of a hybridization, although in view of the above 
Fic. 4.—Leaf of Q. Rudkini 
