538 PROCEEDINGS OP THE AMERICAN ACADEMY. 



mil of Mt. Bufade Mascota, alt. 2,150 to 2,800 m., Man], 20, 1897 /.'. 

 W. NeUon, do. 4093): Mighoacan, TIalpujahna ( Graham) : Mexico, 

 Toluca (Andrieux, no. ill): Desierto Viejo, Sept. 7, 1865, and San 

 Nicolas, Oct 26, L865 (Bourgeau, dob. 858, L106); Valley of Mexico 

 (Schaffiner, no. 896) j cool forests. Sierra de las Cruces, alt. 8,230 m.. 

 An-.. L892 (C. G. Pringle, no. 1227) ; Amecameca, Feb. 8, L893 (E. 

 II'. Kelson, do. 6); foothills, Mt Ixtaccihautl Jan. 5, 1899 (G. C. 

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

 L898 (C. G. Pringle, no. 6862). 



Var. Boucheana, Benth. I.e. 384. Leaves narrowly deltoid-ovate, 

 truncate or subcordate at base. — S. Boucheana, Kuntli, Ind. Sem. Hort. 

 Berol. 18-45. — Michoacan, TIalpujahna (Graham): Puebla, calca- 

 reous hills near Telmacan, Aug. 80, 1897 (O. G. Pringle, no. 7 1 19). 



b. Leaves merely pilose on the nerves beneath, 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, 1 

 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 blnntish lubes; upper lip entire: 

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

 equalling the lip: style somewhat bearded. — Vera Ceuz, 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 sparinglv pubescent 

 above, more or less white tomentose beneath, 1 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 rem< 

 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 ODce and a half longer than the calyx : galea and lip Bub- 

 equal: style bearded. — Oaxaca, Jayacatlan, alt. L ; 280 in., Sept. 11, 



