512 PBOI EEDING8 OF THE AMERICAN ACADEMY. 



calyx generally with Bhorter pubescence. — Hull. Soc. Bot. Belg. xxx. 

 286 & Ann. Conserv. Jard. Bot. Geneve, I.e. S. caesia, Willd. Enum. 

 i. 10; EiBK. 1. c 295. — Central .Mexico to Central America. Hidalgo, 

 Guadalupe, Valley <>f Mexico, Aug., 1865-66 | Bourgeau, noe. 721, - : . 

 Aug. 17, 1865 (Bilimek, no. 316): Mexico, Takubaya, Aug. 28, l- 



'imek, no. 815) : Oaxaca, near Puebla, alt. 2,150 m., Nov. 9, l 

 I.. ( . Smith, no. 908). 

 Var. philippensis. Leave-, as in the species : racemes simple. 

 elongated, 1 to 2 dm. long: calyx short villous. — Oaxaca, Sierra de 



Sail Felipe, ah. 2,300 m.. Sept. 1. 1894 (E. W. Nelson, no. 1 17-". . ( i. t. 



5, l.s'.U (<7. G. Pringle, no. 1958). 



Var. seorsa. Similar to the last: leaves glabrate heneath : racemes 

 simple, elongated ; verticels many-flowered, the lower 2 to 3 cm. apart. — 

 Mexico, Valley of .Mexico, Sept. 19, 1889 (C. G. Pringle, no. 2818). 



Var. albicans. Leaves ovate, thinner than in the other forms, 

 slightly canescent above, very white-tomentose heneath : racemes simple, 

 1 to 1.5 dm. long: calyx densely white-villous. — S. purpurea, var. 

 pubens, Donnell Smith, I.e. iii. 67, not Gray. — Guatemala, Santa 



Rosa, Depart. Santa Rosa. alt. 920 m., Nov., 1892 (Heydi & Lux in 

 exsicc. J. I). Smitli no. 4394). An extremely canescent plant. 



Var. POTOSINA, Briq. I.e. Leaves ovate-lanceolate or lanceolate, 

 long-acuminate, pubescent as in the species: racemes simple, 1 dm. or 

 less long: calyx hirsute. — San Luis Potosi, San Jose Pass, July 23, 

 1890 (C. G. Pringle, no. 3224). 



(I. Leaves pilose-hispid or glabrate beneath : stems and calyces pubescent with 



slender spreading glandular hairs. 



6 1. S. aequidistans. Erect or ascending: stems 1.5 to 1 dm. high, 

 glandular-hirsute : leaves rather remote, the lower small, the upper 

 much larger, oblong-ovate to broadly deltoid-ovate, obtuse, the upper- 

 most 3 to 4.5 cm. long, erenate-serrate, more or less setulose above: 

 racemes slender, elongated, 0.5 to 2dm. long; the verticels 2 6-flowered, 

 all remote, the lower equidistant, 2 to 3 cm. apart : pedicels filiform, 2 

 to I mm. long: calyx campanulate, Btrongly bilabiate, the tube twice or 

 thrice as long as the ovate lips; upper lip entire, lower Bhort-cleft: 

 corolla 1.3 cm. long, the pilose or glabrate tube ventrieose, nearly twice 

 ■ ding the calyx; lip a little exceeding the pilose galea: style 

 bearded. — Siwi.oa, between Rosario and Colomas, July 12, 1897 {J. 

 X. Rote, no. 161 



