166 CONTRIBUTIONS FROM THE NATIONAL. HERBARIUM. 



3. Juglans rupestris Engelm. in Sitgreaves, Rep. Zuui & Colo. 171. pi. 15. 1854. 

 Coahuila and probably in Chihuahua. Western Texas and southern New 



Mexico (type locality). 



Shrub, usually less than 5 meters high, growing in clumps and branched 

 almost to the base, or said to be sometimes a tree 9 meters high; bark smooth 

 and yellowish on young stems, in age thick, furrowed, and broken into plates ; 

 leaflets 13 to 23 ; catkins 5 to 10 cm. long ; nuts dark brown ; wood hard, weak, 

 close-grained, dark brown, its specific gravity about 0.70. " Nogal." 



4. Jug'lans major (Torr.) Heller, Muhlenbergia 1: 50. 1900. 



Jtif/Jans rupestris major Torr. in Sitgreaves, Rep. Zuni & Colo. 171. pi. 16. 

 1854. 



Chihuahua and Durango. Arizona (type locality) and New Mexico. 



Tree, sometimes 15 meters high, with a trunk diameter of 1.5 meters, the 

 trunk short, the branches spreading, the bark dark gray, rough; leaflets 9 to 

 19, 6 to 12 cm. long; vrood hard, rather weak, coarse-grained, dark brown, its 

 specific gravity about 0.67. "Nogal silvestre " (Chihuahua). 



A decoction of the leaves is said to be taken as, a tonic. 



2. HICORIA Raf. Med. Repos. N. Y. II. 5: 352. 1808. 

 About a dozen other species of the genus (the hickory ti'ees) occur in the 

 United States. Their wood is very tough and is much used for articles in 

 which strength and elasticity is needed, such as ax handles, wagon wheels, 

 etc. The seeds of most species have an agreeable flavor and large quantities 

 are eaten. 



Leaflets 5; bud scales imbricate 1. H. mexicana. 



Leaflets 7 to 15 ; bud scales valvate. 



Leaflets 7 or 9, not falcate; shell of the nut thick-_2. H. myristicaeformis. 



Leaflets usually 11 to 15, conspicuously falcate, shell of the nut thin. 



3. H. pecan. 



1. Hicoria mexicana (Engelm.) Britton, Bull. Torrey Club 15: 283. 1888. 

 Carya mexicana Engelm.; Hemsl. Biol. Centr. Amer. Bot._3: 162. 1883. 

 San Luis PotosI and Queretaro ; type from mountains near AlvSrez, San 



Luis Potosi, at an altitude of 2,400 meters. 



Tree, 15 to 18 meters high ; leaflets obovate, sessile, about 15 cm. long, acumi- 

 nate, with a pleasant odor; fruit with a thick husk, the nut somewhat angled. 

 "Nogalillo" (San Luis PotosI). 



The leaves are used for wrapping tamales. The wood is used locally. 



2. Hicoria myristicaeformis (Michx. f.) Britton, Bull. Torrey Club 15: 284. 



1888. 



Juglans myristicaeformis Michx. f. Hist. Arb. Amer. Sept. 211. 1810. 



Carya myristicaeformis Nutt. Gen. PI. 2: 222. 1818. 



Nuevo Leon. Southeastern United States; type from Charleston, South 

 Carolina. 



Large tree, sometimes 35 meters high, with a trunk diameter of a meter; 

 bark dark reddish brown, shallowly fissured into close scales; leaflets 5 to 12 

 cm. long, acute or acuminate ; fruit with a thin husk, the nut rounded, smooth, 

 brown ; wood hard, tough, strong, close-grained, light brown, its specific gravity 

 about 0.80. 



3. Hicoria pecan (Marsh.) Britton, Bull. Torrey Club 15: 282. 1888. 

 Juglans pecan Marsh. Arb. Am^r. 69. 1785. 



Carya olivaeformis Nutt. Gen. PI. 2: 221. 1818. 



Nuevo Le6n, San Luis PotosI, and Hidalgo; reported from Oaxaca and prob- 

 ably in some other states. Eastei*n United States. 



