EI^ISHA MITCHELL SCIENTIFIC SOCIETY. 91 



such forms were seen; all small trees with the bark 

 and g"eneral aspect of cinerea. By December 1 the 

 leaves have turned a lig-ht brown and are niostl}^ per- 

 sistent. The deep, nearly sessile cup, enclosing' nearly 

 one half of the nut, is top shaped and acute at base. 

 The laro'e, obtuse, pubescent scales are appressed or 

 usually so. The cup is strong-ly spreading- just below 

 the margfin. The nut is about one third larg-er than 

 that of cinerea, oval, pubescent; the persistent base of 

 the style is prominent. Only one tree was found 

 in fruit and its nuts were mostly imperfect. 



The character of the pubescence on leaves, twig's and 

 fruit, the oval and entire form of a few of the leaves and 

 the g-eneral appearance of the tree indicate cinerea as 

 one parent. The other parent is one of the long"-peti- 

 oled leaved black oaks. Rubra, which probably does 

 not occur, or rareh% where this was found, would be 

 excluded b}^ the deep cup. The shape of the leaf 

 points to cuneata, but neither nut, cup or bud ag^rees in 

 any particular. The forms of nut and cup are clearly 

 toward those of tinctoria or coccinea, and especially' 

 does the thick wall of the cup and the ang-le made b}' 

 the outer surface just below the marg-in indicate one of 

 these species. I am inclined to say tinctoria. 



O. zinerca x Q. nigra. — The leaves are 3 to 4 inches 

 long", 2 to 3 inches broad, usually broadest at the upper 

 end. In shape the\' vary from elliptical to ovate, rarel}^ 

 slightly three lobed at the summit. The oval leaves 

 are acute at base and usualh' acute at the summit. The 

 others vary from rounded to cordate at base. Old 

 leaves are smooth above except on the midrib which is 

 covered with the close septate, stellate, brownish- 

 gfray pubescence of cinerea; below they are covered 

 with a down of the same color. There is a dis- 



