508 PROCEEDINGS OF THE AMERICAN ACADEMY. 



central Mexico. Mexico, Valley of Mexico, Sept. 7, 1865-66 (Bour- 

 ffeau, no. 859); wooded canons, Sierra de las Cruces, Oct. 2, 1892, and 

 Serrania de Ajusco, alt. 3,075 m., Sept. 11, 1897 (C G. Pringle, nos. 

 4278, 7457). Originally from the region of Ario, Michoacan. 



B. Acaulae. Similar to AngustifoUae but tending to be acaulescent or 

 subacaulesceut, the obovate canesceut basal leaves forming a rosette : 

 peduncle 0.5 to 2.5 dm. high ; raceme as long ; the verticels remote. 



52. S. NANA, HBK. 1. c. 289 ; Benth. in DC. 1. c. 304 ; Hemsl. 1. c. 

 561 ; Briq. 1. c. S. pi-unelloides, Benth. PI. Hartw. 90, 351, not HBK. 

 S. rhomhifoUa, Sesse & Moc. I.e. 8. — Northern Mexico to Central 

 America. Durango, El Salto, July 12, 1898 {E. W. Nelson, no. 4566) : 

 Zacatecas, near San Juan Capistrano, Aug. 18, 1897 (/. N. Rose, no. 

 3534) : San Luis Potosi, rare in the mountains, San Rafael, 1876 

 {Schafner, no. 680) ; alt. 1,840 m. {Parry & Palmer, no. 745, 746) : 

 Guanajuato, 1893 (A. Duges, no. 228 B) : Oaxaca, Boca de Leon, 

 Telixtlahuaca, June 27, 1895 (Z. G. Smith, no. 414). Originally from 

 Guanajuato. 



C. Vulgares, Benth. Branching or sometimes simple herbs, rarely 

 half-shrubs : leaves petioled, ovate, rarely oblong, membranaceous, 

 rounded round-cuneate or subcordate at base. (>S'. prunelloides and 

 *S'. Martensii may be looked for here.) 



« Annuals. 



•<- Coarse more or less canescent plant with long-petioled pale-green leaves and 

 peduncled spiciform heads with persistent foliaceous broad bracts. 



53. S. HiSPANiCA, L. Spec. 25 ; Edw. Bot. Reg. v. t. 359 ; Benth. in 

 DC. 1. c. 308 ; Hemsl. 1. c. 558 ; Briq. in Engl. & Prantl, 1. c. 279. 

 S. tetragona, Moench, Meth. 373. S. prismatica, Cav. fide Hemsl. 1. c. 

 S. neo-hispaiiica, Briq. Ann. Conserv. Jard. Bot. Geneve, ii. 137. — 

 From western Texas and Coahuila to northern South America and the 

 West Indies. Introduced into southern Europe, whence the specific 

 name. Coahuila, Carneros Pass, Sept. 27, 1890 {G. G. Pringle, no. 

 3683) : Durango, sides of arroyos, Santiago Papasquiaro, Aug., 1896 

 {Edw. Palmer, no. 967); bottom-lands, Durango, Oct., 1896 {Edw. 

 Palmer, no. 757) : San Luis Potosi, sand near the city, 1876 

 {Schaffner, nos. 675, 1053) : Guanajuato, 1895 {A. Duges) : Jalisco, 

 Rio Blanco, Oct., 1886 {Edw. Palmer, no. 659) : Vera Cruz, Orizaba 

 {Botteri, no. 534) : Mexico, Santa Fe, Oct. 15, 1865-66 {Boiirgeau, no. 

 1109): Oaxaca, near Rej^es, alt. 1,800 to 2,600 m., Oct. 20, 1894 

 {E. W. Nelson, no. 1782); Jayacatlan, alt. 1,350 m., Nov. 4, 1894 



