520 PROCEEDINGS OF THE AMERICAN ACADEMY. 



in anthesis G to 7 mm. long ; the tube twice or thrice exceeding the 

 lance-subuhite teeth; upper lip tridentate : corolla 1.2 cm. long, short- 

 pilose, the galea about equalling the lip : style slightly bearded. — 

 Mexico, without locality {^Coulter, no. 1120). 



++ 4H- Leaves narrowly triangular-ovate, truncate or slightly cordate at base, on 

 thickish winged petioles, closely and densely white-pubescent beneath. 



92. S. CANDiCANS, Mart. & Gal. 1. c. 61 ; Benth. I.e. 315; Hemsl. 

 I.e. 554; Briq. 1. c. — Puebla, limestone hills between Tehuacan and 

 Esperanza, alt. 2,000 m., Dec. 21, 1895 ((7. G. Pringle, no. 6245). 

 Essentially the type station of the species. 



++■»-+++ Leaves narrow-ovate or oblong, attenuate at base to short petioles, or the 



upper subsessile. 



= Calyx ovate tubular, with sliort blunt lobes, glandular-pubescent, in anthesis 5 

 to 6 mm. long : leaves closely white-pubescent beneath. 



93. S. THYMOiDES, Benth. Lab. 255, & in DC. 1. c. 314; Hemsl. 1. c. 

 566; Briq. I.e. — Southern Mexico. Puebla, limestone hills between 

 Tehuacan and Esperanza, alt. 2,000 m., Dec. 21, 1895 (C. G. Pringle, 

 no. 6251) : Oaxaca, Mitla ( G. Andrieux, no. 150) ; vicinity of Coixt- 

 lalmaca, alt. 2,150 to 2,300 m., Nov. 12, 1894 {K W. Nelson, no. 1915). 

 Species based in part on Andrieux's plant. 



=: = Calyx tubular-campanulate, with acuminate lobes, not glandular-pubescent, 

 in anthesis 6 to 8 mm. long: leaves sparingly stellate puberulent or glab- 

 rate. 



a. Leaves oblong, 1 to 2.5 cm. long, the uppermost subsessile. 

 1. Leaves finely stellate-puberulent at least when young. 



94. S. coahuilensis. Freely branching mostly from the stout 

 woody base ; branches assurgent, 0.5 to 7 dm. high ; bark pale brown, 

 finely stellate-puberulent or glabrate : leaves confined mostly to the lower 

 portions of the branches : racemes elongated, becoming 0.5 to 3.5 dm. 

 long, the rhachis often glandular-puberulent ; verticels mostly 2-flowered, 

 all remote, the lowest 2 to 3 era. apart : bracts ovate-oblong, acuminate, 

 caducous : pedicels filiform, 2 to 4 mm. long : calyx granulose-puberu- 

 lent ; tube twice exceeding the ovate-lanceolate subequal lobes ; upper 

 lip entire: corolla 1-5 cm. long, blue with white centre; the glabrous 

 tube nearly twice exceeding the calyx ; the slightly pilose galea one half 

 as long as the broad lower lip. — S. chamaedryoides, Wats., Proc. Am. 

 Acad, xviii. 137, in part, not Cav. — Coahuila, rocky hill, Saltillo, 

 1878 {Parry, no. 29), May, 1898 {FAw. Palmer, no. 194) ; Parras, 

 June, 1880, and Lerios, July, 1880 {Edw. Palmer, nos. 1072, 1064). 



