STANDLEY TEEES AND SHRUBS OF MEXICO 1427 



9. Stevia phlebophylla A. Gray in S. Wats. Proc. Amer. Acad. 22: 419. 1887. 

 Jalisco; type from Rio Blanco. 



Shrubby, about 1 meter high, simple or slightly branched, glabrous; leaves 

 opposite, the blades oblong-elliptic or oval-ovate, 8.5 to 14 cm. long, 2 to 6 cm. 

 wide, serrulate or sharply serrate, acuminate, cuneate at base, glabrous and 

 glauceseent, very veiny, on petioles 1 cm. long or less; panicles very dense, 

 glomerate, terminating stem and branches of inflorescence; involucre spreading- 

 pubescent and glandular; flowers white; achene glabrous; pappus short, coroni- 

 form. 



10. Stevia venosa A. Gray, Proc. Amer. Acad. 21: 382. 1886. 

 Chihuahua; type collected 150 miles north of Batopilas. 



Suffrutescent or herbaceous, about 0.5 meter high, simple, glabrous but gland- 

 dotted; leaves opposite or alternate, the blades elliptic or oblong-elliptic, 3 to 6 

 cm. long, 8 to 20 mm. wide, acute or obtuse, at base cuneate, glabrous, glauceseent, 

 very veiny; panicles dense, 4 to 9 cm. wide; involucre 5 to 7 mm. high, incurved- 

 puberulous and glandular; flowers purplish-tinged; achene hispidulous; pappus 

 short, coroniform. 



11. Stevia nitida Walp. Linnaea 14: 320. 1840. 

 Mexico; definite locality not known. 



Fruticose ?, glabrous, oppositely branched; leaves opposite, on petioles about 

 20 mm. long, the blades ovate-elliptic, about 7 cm. long, 25 to 30 mm. wide, 

 acuminate, serrate, glabrous, shining above, glaucous beneath, penninerved; 

 corymb many-headed, terminal; phyllaries obtuse; achene glabrous; pappus 

 coroniform. (Description compiled.) 



No specimens of this species have been examined, and its position here is 

 inferential. 



12. Stevia collodes Greenm. Proc. Amer. Acad. 39: 93, 1903. 

 Puebla; type from calcareous hills near Tehuacan. 



Shrub about 0.5 meter high or less, oppositely branched, viscid, puberulous 

 above; leaves opposite, sessile or subsessile, linear or linear-oblanceolate, 1.5 to 

 4 cm. long, 1.5 to 4 mm. wide, obtuse, narrowed at base, entire, thick, obscurely 

 veined, obscurely puberulous or glabrous; heads few, in small subumbelliform 

 panicles about 1 to 2 cm. wide; involucre 7 to 9 mm. long, the phyllaries acute; 

 corollas white, 8.5 to 9 mm. long, glandular except on teeth; achene hispidulous 

 above; pappus coroniform. 



13. Stevia stenophylla A. Gray, Proc. Amer. Acad. 15: 25. 1879. 

 Stevia foliosa Small, Fl. Southeast. U. S. 1163. 1903. 



Chihuahua to Queretaro; type collected near San Luis Potosi. Texas. 



Slender, oppositelj^ branched shrub, 0.2 to 0.6 meter high, incurved-puberulous 

 chiefly above; leaves opposite, linear-filiform to very narrowly linear-lanceolate, 

 or rarely narrowly lanceolate, 3 to 8 cm. long, 0.8 to 4 mm. wide, acuminate, 

 narrowed into a petioliform base, ent'ire or sharply toothed, essentially glabrous; 

 panicles dense, flatfish, 2 to 8 cm. wide; involucre 4 to 5 mm. high, subglabrous 

 or sparsely puberulous; flowers white; achene sparsely hispidulous; pappus of 

 awns and squamellae, rarely of squamellae only. 



14. Stevia salicifolia Cav. Icon. PL 4: 32. pi. 354. 1797. 

 ?Stevia angustifolia H. B. K. Nov. Gen. & Sp. 4: 149. 1820. 

 Durango to Mexico and Puebla. 



Shrub about 0.6 meter high or less, oppositely branched, appressed-puberulous, 

 especially above, or nearly glabrous; leaves opposite, the blades narrowly lan- 

 ceolate, linear-lanceolate, or lance-elliptic, 3 to 10 cm. long, usually 5 to 10 mm. 

 wide, acuminate at each end, entire or usually serrulate, on petioles 3 to 10 

 mm. long; panicles dense, flatfish, 2.5 to 14 cm. wide; involucre 5 mm. high, 



