538 CONTEIBUTIONS FBOM THE NATIONAL HEEBARIUM. 



Shrub, 2 meters liigh, unarmed ; leaves alternate, pinnate, the rachis nar- 

 rowly winged, the, leaflets 11 to 25, oblong, 6 to 12 mm. long, minutely 

 crenulate ; flowers small, paniculate ; fruit of 2 to 5 small carpels. 



Sesse and Mociiio give the vernacular name of Zanthoxylum inerme as 

 " gobernadora." 



18. DECATEOPIS Hook, f . ; Benth. & Hook. Gen. PI. 1: 298. 1862. 



1. Decatropis bicolor (Zucc.) Radlk. Sitzungsb. Math. Phys. Akad. Wiss. 

 Munchen 16: 30G. 1886. 



Simaba Ucolor Zucc. Flora 15^: Beibl. 72. 1832. 



Decatropis coulteri Hook. f. ; Benth. & Hook. Gen. PI. 1 : 299. 1862. 



Nuevo Leon, Tamaulipas, Veracruz, and Hidalgo. 



Shrub or small tree, 2 to 7 meters high, unarmed ; leaves alternate, pinnate, 

 the leaflets 5 to 11, lanceolate, 2.5 to 10 cm. long, thick, acute, green above, 

 tomentose beneath ; flowers small, white, in large terminal panicles ; fruit of 

 2 to 5 small carpels. 



69. KOEBERLINIACEAE. Junco Family. 

 Refekence: Barnhart, N. Amer. Fl. 25: 101-102. 1910. 



1. KOEBERLINIA Zucc Flora 15": Beibl. 73. 1832. 

 1. Koeberlinia spinosa Zucc. Flora 15*: Beibl. 73. 1832. 



Northeastern Sonora to Tamaulipas and Hidalgo. Western Texas to southern 

 Arizona. 



Shrub or tree, sometimes 8 meters high, with a trunk 30 cm. in diameter, 

 the branches short, stiff, green, spine-tipped ; leaves alternate, minute, scale- 

 like, soon deciduous ; flowers small, greenish, short-racemose ; fruit a small 

 berry ; wood hard, close-grained, dark brown or nearly black, its specific gravity 

 about 1.12. Known generally in Mexico and Texas as " junco " ; " abrojo " 

 {Oelioterena) ; "corona de Cristo " (Arizona). 



The wood is resinous and burns readily, giving off a disagreeable odor. The 

 plant is little more than a great mass of spines, and often forms impenetrable 

 thickets. 



70. STTRIANACEAE. Bay-cedar Family. 

 1. SURIANA L. Sp. PI. 284. 1753. 



1. Suriana maritima L. Sp. PI. 284. 1853. 



Yucatjin. On coastal sands and rocks, Florida, West Indies, South America, 

 and in the Old World ; type from Bermuda. 



Shrub or small tree, sometimes 8 meters high, with a trunk 30 cm. in 

 diameter, but usually much smaller ; bark rough, irregularly fissured, brown ; 

 leaves altex'nate, thick, linear-spatulate, 1.5 to 4 cm. long, entire, densely 

 pubescent ; flowers small, yellow, clustered ; sepals 5, persistent ; petals 5, 

 imbricate, 7 to 9 mm. long, erose at apex; fruit of small carpels, 4.5 mm. 

 long; wood very hard and heavj% reddish brown. " Cuabilla " (Cuba); 

 " gitaron," " temporana " (Porto Rico). 



Known in the Bahamas as " bay-cedar." 



71. SIMAROUBACEAE. Simaruba Family. 



Reference : Small, N. Amer. Fl. 25 : 227-239. 1911. 



Shrubs or trees ; leaves usually alternate, simple or pinnate ; flowers perfect 

 or unisexual, usually small ; fruit a drupe, berry, capsule, or samara, the 

 seeds usually solitary. 



Besides the genera here listed, Simaha cedron Planch, has been reported from 

 Mexico, but the writer has seen no specimens. 



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