362 CONTRIBUTIONS FROM TtlE NATIONAL HERBARIUM. 



or piuk. " Dormilona," " pinahuihiiixtle," " quecupatll," " sensitiva," "ten 

 vergiienza," " vergonzosa," " xiiuitz " (Ramirez) ; " cierra tus puertas" (Guate- 

 mala). 



34. Mimosa nelsonii Robinson, Proc. Amer. Acad. 33:314. 1898. 



Mimosa lignosa Micheli, M^m. Soc. Phys. Hist. Nat. Gen&ve 34: 278. pi. 23. 

 1903. 



Michoacan to Oaxaca ; type collected between San Geronimo and La Venta, 

 Oaxaca. 



Shrub, 0.3 to 2 meters liigb, rather sparsely armed with straight spines; 

 leaflets 5 to 10 mm. long, thick, obtuse ; flowers pink ; fruit short, densely bristly, 

 about 5 mm. wide. 



35. Mimosa xanti A. Gray, Proc. Amer. Acad. 5: 157. 1862. 



Mimosa langlassei Micheli. M§m. Soc. Phys. Hist. Nat. Geneve 34: 277. pi. 23. 

 1903. 



Baja California (type locality) and Michoacan. Guatemala. 



Erect shrub, 1 to 3.5 meters high, often forming dense thickets, armed with 

 stout straight spines ; leaflets oblong, about 1 cm. long, acute or obtuse ; flowers 

 pink; fruit short, hispid. " Celosa " (Baja California). 



36. Mimosa camporum Benth. in Hook. Journ. Bot. 2: 130. 1840. 

 Tepic to Guerrero. Central America and South America. 



Plants chiefly herbaceous but sometimes somewhat shrubby, nearly or quiio 

 without spines; leaflets about 8 mm. long; flowers pink; fruit short, hispid. 



37. Mimosa galeottii Benth. Lond. Journ. Bot. 5: 92. 1846. 

 Acacia hirta Mart. & Gal. Bull. Acad. Brux. 10^: 318. 1843. 



Morelos, Oaxaca, and Guerrero ; type from mountains of Yolotepeque, Oaxaca, 

 at an altitude of 2,460 meters. 



Shrub or small tree, 3 to 4.5 meters high, armed with rather slender recurved 

 spines ; leaflets very numerous, 2 mm. long or shorter ; flowers yellowish, turn- 

 ing pink ; fruit usually very spiny, about 4 cm. long and 6 mm. wide. " Una 

 de gato" (Michoacan, Guerrero). 



Specimens reported by Micheli * as M. adenotricha belong here. 



38. Mimosa somnians Humb. & Bonpl. ; Willd. Sp. PI. 4: 1036. 1805. 

 Veracruz, Oaxaca, and Guerrero. Widely distributed in tropical America. 

 Plants chiefly herbaceous but often suffrutescent, armed with rather few short 



spines ; leaflets mostly 4 to 5 mm. long ; flowers white or pinkish ; fruit glabrous 

 or pilose, 3 to 4 mm. wide. 



39. Mimosa dormiens Humb. & Boupl. ; Willd. Sp. PI. 4: 1035. 1805. 

 Chiapas. Widely distributed in tropical America. 



Ascending or erect shrub, densely armed with slender spines; leaflets about 

 8 mm. long, pubescent. " Dormidera " (Colombia). 



40. Mimosa pigra L. Cent. PI. 1 : 13. 1755. 

 Mimosa asperata L. Syst. Nat. ed. 10. 1312. 1759. 



Mimosa herla^idieri A. Gray; Torr. U. S. & Mex. Bound Bot. 61. 1859. 



Tamaulipas to Sinaloa. Chiapas, and Tabasco. Widely distributed in tropical 

 America and Africa. 



Erect or ascending shrub, 1 to 2 meters high, armed with numerous stout 

 spines; leaflets linear, about 5 mm. long; flowers pink; fruit hispid, often very 

 densely so, about 1 cm. wide. " Zarza " (Guerrero. Costa Rica); " choven " 

 (Ver.icruz, San Luis PotosI, Sclcr) ; " espina de vaca " (Pnnnma). 



*Mem. Soc. Phys. Hist. Nat. Geneve 34: 276. 1903. 



