522 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Willd. Hort. Berol. i. 29, t. 29, — Central Mexico. Zacatecas, plains, 

 La Honda Station, Aug. 18, 1890 ( (7. G. Pringle, no. 3170): San 

 Luis Potosi, alt. 1,850 to 2,4G0 m., 1878 {Parry & Palmer, no. 753) : 

 Hidalgo, bare hills above Pachuca, alt. 2,600 ft., July 18, 1898 {C. G. 

 Pringle, no. 6907) : Mexico, mountains near Mexico and Guadalupe, 

 Aug. 24, 1865 {Bourgeau, no. 855). 



Var. isochroma. Leaves reduced, 0.5 to 1.5 cm. long, short-petioled 

 or subsessile, mostly crowded, canescent on both faces. — San Luis 

 Potosi, in the mountains, San Rafael and San Miguelito.1876 {Schaff- 

 ner, uos. 663, 664) ; without locality, alt. 1,850 to 2,460 m., 1878 {Parry 

 & Palmer, nos. 750, 751^). 



= = = Stems witli spreading pubescence : leaves 2 to 3 cm. long; blades little 



exceeding tlie petioles. 



99. S. PAUCiFLORA, HBK. I.e. 303; Benth, I.e. 315; Hemsl. I.e. 

 563. — A doubtful species from " New Spain." 



= == = = Of this section but not identified. 



S. SPiCATA, R. & S. Syst. Mant. i. 202 {S. pulchella, HBK. 1. c. 288, 

 t. 140, not DC. S. jiomifera, Sesse & Moc. 1. c. 7, ex. char., not L.) and S. 

 BREViFLORA, Moc. & Sesse in Benth. Lab. 274, species described from 

 "New Spain" are placed by Bentham in this section. S. spicata, Gray, 

 Syn. Fl. 1. c. 461, is very different from the plate of S. pulchella, HBK. 

 *+ -M- Calyx fuunelform, the lobes becoming ampliate. 



= Leaves ovate or ovate-orbicular, dark green above, much paler beneath, regularly 



crenate. 



100. S. BALLOTAEFLORA, Benth. Leaves rugose, densely white-tomentu- 

 lose beneath, 0.5 to 3 cm. long, rarely larger : racemes 0.5 to 8 cm. long. 

 — Lab. 270, & in DC. I.e. 313 ; Torn Bot. Mex. Bound. 131 ; Gray, 

 1. c. ; Hemsl. 1. c. 553 ; Briq. 1. c. S. laxa, Benth. 1. c. — Texas to San 

 Luis Potosi. Mexico, without locality {Gregg, no. 322) : Coahuila, 

 Monclova, Aug., 1880, Parras, June, 1880, Lerios, July, 1880, Saltillo, 

 May, 1898 {Edw. Palmer, nos. 1069, 1067, 1068, 107): Tajiaulipas, 

 1843 {Berlandier, no. 3186): San Luis Potosi, San Rafael, 1876, 

 {Schaffner, no. 670) ; near Matehuala, June 18, 1898 (E. IF. Nelson, no. 

 4527). 



Var. Eulaliae. Leaves large, 3 cm. long, broad-ovate, rugose, very 

 slightly pubescent and hardly canescent beneath : racemes very numerous, 

 4 to 9 cm. long. — Chihuahua, Santa Eulalia Mts., Sept. 1, 1885 

 {C. G. Pringle, no. 659). 



