538 PROCEEDINGS OF THE AMERICAN ACADEMY. 



mit of Mt. Bufa de Mascota, alt. 2,150 to 2,300 m., March 20, 1897 {E. 



W. Nelson, no. 4093): Michoacan, Tlalpujahua {Graham) : Mexico, 

 Toluca {Andrieux, no. 144) ; Desierto Viejo, Sept. 7, 18G5, and San 

 Nicolas, Oct. 26, 1865 {Bourgeau, nos. 853, 1106); Valley of Mexico 

 (Schnffner, no. 396); cool forests. Sierra de las Cruces, alt. 3,230 m., 

 Aug., 1892 ((7. G. Pringle, no. 4227) ; Amecameca, Feb. 3, 1893 {E. 



W. Nelson, no. 6) ; foothills, Mt. Ixtaccihautl, Jan. 5, 1899 (0. C. 

 Deam, no. 124) : Morelos, Serrania de Ajusco, alt. 2,460 m., May 26, 

 1898 {0. G. Pringle, no. 6862). 



Var. BoucHEANA, Benth. 1. c. 334. Leaves narrowly deltoid-ovate, 

 truncate or subcordate at base. — *S'. Boucheana, Kunth, Ind. Sem. Hort. 

 Berol. 1845. — Michoacan, Tlalpujahua {Graham): Puebla, calca- 

 reous hills near Tehuacan, Aug. 30, 1897 (C. G. Pringle, no. 7449). 



h. Leaves merely pilose on the nerves beneatli, coarsely crenate, and with blunt 

 tips : calyx not at all or very minutely glandular-puberulent. 



151. S. orizabensis. Branches short-pilose with recurved hairs, 

 minutely glandular above : leaves ovate, thin, minutely pilose above, 4 

 to 8 cm. long ; the base subcordate with a short acumination at the junc- 

 tion with the slender retrorse-pilose petiole: raceme 1 dm. or so long; 

 verticels 4-10-flowered, all remote, the lowest 4 to 5 cm. apart: bracts 

 ovate-lanceolate, acuminate : pedicels 3 to 5 mm. long, sordid-viscid : 

 calyx in anthesis 1.5 to 1.75 cm. long, slightly pilose on the nerves ; the 

 tube nearly twice exceeding the ovate bluntish lobes; upper lip entire: 

 corolla-tube glabrate, twice exceeding the calyx ; galea, long-bearded, 

 equalling the lip: style somewhat bearded. — Vera Cruz, Mt. Orizaba 

 {Botteri, no. 1168). 



= = Corolla 2.5 to 2.75 cm. long. 



152. S. adenophora. Shrub (" sarmentose " according to Smith) 

 with brown bark ; the branches glandular-pilose : leaves cordate-ovate, 

 acuminate (rarely blunt), crenate-serrate, green and sparingly pubescent 

 above, more or less white tomentose beneath, 4 to 10 cm. long, on 

 slender petioles 3 cm. or less in length : racemes 3 dm. or less in length ; 

 the rhachis very glandular-hairy ; verticels 6-20-flowered, all remote, 

 the lowest 2 to 3 cm. apart : bracts ovate, glandular, caducous : pedicels 

 6mm. or less in length, glandular : calyx campanulate, very glandular, 

 in anthesis 8 to 10 mm. long, the tube twice exceeding the broad ovate 

 mucronate or short-acuminate lobes ; upper lip entire : corolla glandular- 

 pilose, the tube once and a half longer than the calyx ; galea and lip sub- 

 equal : style bearded. — Oaxaca, Jayacatlan, alt. 1,230 m., Sept. 11, 



