382 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



"Huajillo" (Coahuila, Tamaulipas, Nuevo Le6n, Texas; sometimes written 

 "huajilla" or "guajilla") ; " mimbre," " matorral " (Tamaulipas). 

 Wood sometimes used for tool handles and other small objects, also for fuel. 



56. Acacia glomerosa Benth. Lond. Journ. Bot. 1 : 521. 1842. 

 Veracruz. Central America and South America. 



Shrub or small tree, often scandent, armed with numerous very short spines ; 

 leaflets numerous, about 1 cm. long; flower heads small, numerous, racemose- 

 paniculate. 



Acacia laccifera Villada (Naturaleza II. 2:487. pi. 30. 1896) is probably a 

 synonym of this species. 



57. Acacia subangulata Rose, Contr. U. S. Nat. Herb. 5: 194. 1899. 

 Puebla and Oaxaca ; type from limestone hills near Tehuac^n, Puebla. 

 Tree, 4.5 to 6 meters high, armed with short stout straight spines; leaflets 



numerous, 7 to 13 mm. long; flower heads mostly racemose-paniculate; fruit 

 about 10 cm. long and 2.5 cm. wide. 



58. Acacia riparia H. B. K. Nov. Gen. & Sp. 6: 276. 1823. 



Sinaloa to Guerrero, San Luis Potosf, and Yucatan. West Indies, Central 

 America, and South America ; type from Brazil. 



Scandent shrub, armed with short recurved spines ; leaflets 5 to 7 mm. long ; 

 flowers yellowish white ; fruit about 9 cm. long and 2 cm. wide, flat, often 

 glaucescent. " Tlahuitol " (San Luis PotosI, Urbina) ; " zarza " (Porto Rico) ; 

 " rasga-rasga," " panelo," " toldillo " (Colombia); "yax-catzim" (Yucatan, 

 Maya) ; " gatuno bianco" (Sinaloa). 



59. Acacia palmeri S. Wats. Proc. Amer. Acad. 17: 350. 1882. 



Known only from the type locality, in the Sierra Madre south of Saltillo, 

 Coahuila. 



Shrub, nearly glabrous, armed with short spines ; pinnae 1 or 2 pairs, the 

 leaflets 6 to 8 mm. long ; flower heads axillary. 



60. Acacia malacophylla Benth. ; A. Gray, PI. Wright. 1 : 64. 1852. 

 Coahuila and Nuevo Le6n. Western Texas (type locality). 



Shrub, armed with short spines ; leaflets about 7 mm. long ; fruit flat, about 8 

 cm. long and nearly 2 cm. wide, glabrous. 



61. Acacia purpusii T. S. Brandeg. Univ. Calif. Publ. Bot. 3: 380. 1909. 

 Known only from the type locality, San Luis Tultitlanapa, Puebla. 



Shrub, armed with short stout recurved spines ; leaflets about 8 mm. long, 

 glabrate, with prominent venation ; fruit about 8 cm. long and 2 cm. wide, fal- 

 cate, stipitate, glabrate. 



62. Acacia occidentalis Rose, Contr. U. S. Nat. Herb. 8: 32. 1903. 

 Sonora (type locality) and Sinaloa; perhaps also in Chihuahua. 



Shrub or tree, 2 to 12 meters high, armed with short stout dark spines ; leaflets 

 2 to 3 mm. long; flowers white or nearly so ; fruit thin, flat, about 7 cm. long and 

 2 cm. wide. " Dfeota " (tSsota ?) (Sonora). 



63. Acacia micrantha Benth. Trans. Linn. Soc. Bot. 30: 526. 1875. 

 Tamaulipas and San Luis PotosI. 



Shrub, armed with short spines; leaflets 7 to 11 mm. long; flower heads 

 (Blender-pedunculate, axillary or racemose; fruit flat, thin, about 6 cm. long 

 and 1.8 cm. wide, glabrous, rounded at apex. 



64. Acacia roemeriana Scheele, Linnaea 21: 456. 1848. 



Chihuahua and Coahuila; Baja California. Western Texas (type locality). 



Shrub, 1 to 2 meters high, armed with short, mostly recurved spines; leaf- 

 lets 7 to 15 mm. long; flower heads mostly axillary; fruit flat, thin, about 7 

 cm. long and 1.5 cm. wide, often falcate, glabrous. 



This is considered a valuable honey plant in western Texas. 



