522 PROCEEDINGS "l THE AMERICAN ACADEMY. 



Willd. Bort Berol. i. 29, t. 29. — Central Mexico. Za< ah i as. plains. 

 La Honda Station, Aug. 18, L890 (C. G, Pringle, do. .'HTu); Sam 

 Luis Potosi, ;ilt. 1,850 to 2,460 in.. 1878 {Parry & Palmer, do. 71 

 Hidalgo, bare bills above Pachuca, alt. 2,600 ft., July 18, 1898 | ( . G. 

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

 Aug. 24, L865 i Bourgeau, do. 855 I. 



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

 or subsessile, mostly crowded, canescent on both faces. Sam Li is 

 Potosi, in the mountains, Sao Rafael and San Miguelito,1876 (Schaff- 

 ner, nos. 668, 664) ; without locality, alt. 1, *.".<» to 2.4(11) m.. 1*7* I'.m-y 

 & J'd/mer, D08. 750, 75l£). 



= = = Stems with spreading puhescence : leaves 2 to 3 cm. long; blades little 



exceeding the petioles. 



99. S. paui tii.ORA, HBK. I.e. 303; Benth. I.e. 815; Hemsl. I.e. 

 oG3. — A doubtful species from " New Spain." 



= = = = Of this section but not identified. 



S. spicata, \l. & S. Syst. Mant i. 202 (S.pidcheUa, HBK. I.e. 288, 

 t. 1 1". not DC. S. pomifera, Sesse & Moc 1. c. 7, ex. char., not L.) ami S. 

 breviflora, Moc. & Sesse in Benth. Lab. 274, species descrihed 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. pidchella, II BK. 

 *+ ++ Calyx funnelform, the lobes becoming amnliate. 



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



crenate. 



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

 loso beneath, 0.5 to 3 cm. long, rarely larger: racemes <'••"' to 8 cm. long. 

 — Lab. 27<>, & in DC. I.e. 313 ; Torr. Bot. Mex. Bound. LSI; Gray, 

 1. c. : Hemsl. I.e. 553 ; Briq. 1. c. .V h/.m. Benth. 1. c. — Texas t,, San 

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

 Monclova. Aug.. isso, 1 'arras, dune. 1880, Lerios, .1 uly, ISSO. Saltillo, 

 May. 1898 {Edvo. Palmer, nos. 10(59, 1067, 1068, 107): Tamaulipas, 

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



S haffner, do. 670) ; near Matehuala, June 18, 1898 (JZ. W. Nelson, no. 

 4527). 



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

 Blightly pubescent and hardly canescent beneath : racemes very numerous, 

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

 (C. G. Pringle, do. 659). 



