1918^ Additioxs to Arboeesceistt Flora 135 



shaped fruit, approximately 2.5 cm. thick, the nut unangled, dark 

 brown and thick walled, the husk nearly black when dry, thin, split- 

 ting only at top, not freeing the nut. 



Varieties of Hicoria porcixa (Mx.) Eaf. (Juglans porcina 

 Mx. f. : Arb. Am. i: 306. 1810). This would seem to be, in the pres- 

 ent state of our information, the preferable name for this species, 

 rather than Hicoria glabra (Mill.) Brit. In addition to the type with 

 five glabrous leaflets, destitute or nearly so of resinous globules on 

 their lower surface and fig-shaped fruit on which the thin husk splits 

 only at the top, the following other forms occur around Chapel Hill, 

 N". C. : var. liirsuta n. c. {Hicoria glabra var. Ashe, Notes on Hick- 

 ories), with the petioles and lower surface of leaflets soft white pubes- 

 cent, the fruit as in the type; and var. reniformis n. c. {Gary a var. 

 Ashe, Bull. Ch. Mus. 14: 2. 12), with subglobose compressed fruit 

 almost without a stripe, and subcordate at apex. At Chapel Hill the 

 pubescent form of this tree invariably has a fig-shaped fruit, while on 

 a sandy ridge in the w^estern part of Orange County, N. C, it has a 

 short obovate fruit. H. porcina acuta^ (Sar.) n. c. should also be 

 looked for in this State. It has fruit and nut pointed. 



Another hickory which is to be looked for in southeastern Xorth 

 Carolina is H. similis n. sp. This is one of the most distinct of the 

 porcina races and can be regarded as its South Atlantic coastal plain 

 representative. 



Leaflets prevailingly 7, rarely 5, somewhat larger especially broader 

 than those of porcina j glabrous or essentially so before mature, by 

 which time devoid of resinous globules. Twigs slender, dark red- 

 brown (not purple brown as in ovalis), scarcely if any stouter than 

 in porcina; terminal buds oblong-ovate, the outer scales short, cari- 

 nate, bristle-tipped and persistent. Fruit ficiform, larger by one- 

 fourth or one-third than that of porcina, nearly as large as that of 

 //. ovalis megacarpa but more tapering at the base; husk very thin, 

 splitting only at the apex; nut pale brown, obovate, slightly com- 



*Carya porcina acuta Sarg. T. & S. 2: 200. 11)13. 



