PAPERS ON BOTANY 



115 



usnall}^ large and hairy, the foliage and fruiting cups are 

 as they should be in cllipsoidalis. So far as I can see now, 

 therefore, Miss Marshall's tree must be taken for velutina 

 and Dr. Pepoon's for ellipsoidalis. 



On the other hand, among the many specimens collected 

 by Mr. Bebb about Fountaindale are three sheets in the 

 Field Museum which reall}'^ appears to represent a hybrid. 

 Their leaves are of the hard texture, moderate size and 

 rather rounded outline with deep open sinuses that are 

 frequently found in Q. coccinea, and they are glabrous 

 except for axillary domatia beneath. The rather large 

 fruit, with acorns 15 mm., and cups over 20 mm. in 



Distribution of Jack Oak 



diameter, might pass for that of coccinea. But the buds, 

 much larger than in ellipsoidalis (as much as 3X7 mm.) 

 though not larger than in coccinea, are rusty-hairy as in 

 velutina as in which they may be somewhat prismatic, thus 

 differing from ellipsoidalis and the related but not associ- 

 ated coccinea. For this hybrid, represented by sheets 5766 

 (Bebh, 16), 6129 {Behh, Jfl', "Westfleld Woods") and 

 204583, in the herbarium of the Field Museum, I have pro- 

 posed* the name X^. palaeoUthicola. 



Specimens that I have examined show the distribution 

 of Qiiercus ellipsoidalis in its various forms to be as indi- 

 cated on the accompanyig sketch-map and in the following 

 tabulation : — 



*Proc. Amer. Philosoph. Soc. 56 : 50. pi. 1. 1917. 



