75 



7a. Carya ovalis variety obcordala (Muhlenberg) Sargent. 

 "The fruit varies from subglobose to short-oblong or to slightly obo- 

 vate, showing a tendency to pass into that of the other varieties of 

 the species. It varies from 2-3 cm. in diameter, and the involucre, 

 which is from 2-5 mm. thick, splits freely to the base or nearly to the 

 base by narrowly winged sutures, one of them rarely extending only 

 to the middle of the fruit. The nut is usually much compressed, often 

 broadest above the middle, slightly angled sometimes to below the 

 middle, rounded at the base and much compressed, often broadest 

 above the middle, slightly angled sometimes to below the middle, 

 rounded at the base and rounded and often more or less obcordate at 

 the apex." 



7b. Carya ovalis variety odorata (Marshall) Sargent. "The 

 name may have been given by Maishall to this variety on account 

 of the strong resinous odor of the inner surface of the fresh involucre 

 of the fruit, which I have not noticed m that of the other forms. The 

 fruit is subglobose oi sometimes slightly longer than broad, flattened 

 and usually from 1.3-1.5 cm. in diameter. The involucre varies from 

 1-1.5 mm. in thickness and splits freely to the base by distinctly winged 

 sutures. The nut is rounded or acute at the base with a short point, 

 i-ounded at the apex, verj^ slightly or not at all ridged, pale colored, 

 from 1.2-1.5 cm. long and wide and from 1-1.2 cm. thick." 



7c. Carya ovalis variet}^ obovalis Sargent. "In the fourth form 

 the fruit is more or less obovate, aliout 2.5 cm. long and 2 cm. in 

 diametei, and the involucre varies from 2-4 mm. in thickness. The 

 nut is much compressed, pointed or rounded at the apex, rounded 

 at the base, usually about 2 cm. long, nearly as broad and about 1.5 

 cm. thick." "The fruit resembles in shape that of Carya glabra, but the 

 involucre is thicker and splits easily to the base or nearly to the base." 



7d. Carya ovalis variety obcordata, f. vestita Sargent. Bot. 

 CJaz. 66:246:1918. This is a form described from a specimen collected 

 by the author on the border of Dan's Pond in Knox County. It differs 

 from "the variety obcordata in the thick tomentose covering of the 

 branchlets during their first year. The leaves of this form are slightly 

 pubescent in the autumn on the under surface of the midribs. Although 

 the nuts are more compressed than those of the ordinary forms of var. 

 obcordata, the fruit is of that variety. The branchlets are unusually 

 stout for a form of Canja oralis and aie covered with rusty tomentum 

 during their first year and are more or less pubescent in their second 

 and third seasons." 



Distribution. — AVestern New York west to Illinois and south to 

 North Carolina, Georgia, Alabama, Mississippi, Arkansas and Mis- 



