58 ROBINSON 
1 mm. long); anthers with distinct but short and broad bluntish 
terminal appendage; achenes very slender, 4 mm. long, light- 
colored, tapering to the stipe-like base, slightly hispid on the angles; 
pappus-bristles dull-white, nearly smooth, unequal, the longest about 
4 mm. in length.—Bull. Torr. Bot. Club, xix. 1 (1892). 
La Paz: Prov. Larecaja: Ingenio del Oro, alt. 3050 m., Rusby, no. 1747 
(Gr., N. Y., U.8.). 
— NOT INDICATED: Cargadira, alt. 2440 m., R. S. Williams, no. 1521 
39. E. Lobbii Klatt, Ann. Naturhist. Mus. Vienna, ix. 356 (1894); 
Robinson, Proc. Am. Acad. lv. 58 (1919). ? E. sordescens Buchtien, 
Contrib. Fl. Boliv. 189 (1910), not DC. 
La Paz: Prov. Larecaja: San Carlos near Mapiri, alt. 750 m., Buchtien, 
pee (N. Y., phot. Gr.), 1538 (N. Y.). 
eru. 
In habit, pubescence, and many other traits this species is sus- 
piciously close to E. Lundianum DC. of Atlantic Brazil. That, 
however, has smaller (about 20-flowered) heads and a less imbri- 
cated involucre with the outer scales much narrower and not, as in 
E. Lobbii, conspicuously rounded at tip. 
36. E. microstemon Cass. Dict. xxv. 432 (1822); Robinson, 
Proc. Am. Acad. liv. 295, 340, 356 (1918), lv. 69 (1919). E. guadelu- 
pense Britton, Bull. Torr. Bot. Club. xviii. 333 (1891), as to pl. from 
Guanai in part (Gr.), not Spreng. 
A Paz: Prov. Onasumos: vicinity of La Paz, alt. 3050 m., Bang, no. 
L 
504 (Gr., U.S., Mo.); Prov. Larecaja: at Guanai, alt. 610 m., Rusby, no. 
ae in part (Gr. Pies Caupolican: Tumupasa, flowers pale blue, R. S. 
I 1 
[An annual weed, frequent throughout the warmer parts of the American 
continent. | 
37. E. pycnocephalum Less. Linnaea, vi. 404 (1831); Robinson, 
Prov. Am. Acad. liv. 296, 340 (1918). HE. Sternbergianwm Britton, 
Bull. Torr. Bot. Club, xviii. 334 (1891), in part, not DC. 
La Paz: Prov. Yungas: alt. 1830 m., Rusby, no. 1608 (Gr., U. 8.). 
[Southw. U. 8. to Braz.] 
38. E. polopolense Robinson (p. 10). Suffruticose, branched, 
about 5 dm. high, slightly villous-pubescent on the petioles, leaf- 
margins, and chief veins, otherwise glabrous; stem erect, terete, 
purplish or brownish, 3 mm. thick, with white pith; internodes some- 
times 10-13 cm. long; branches ascending, slender, leafy; leaves 
opposite, petiolate, ovate, acuminate, sharply. serrate-dentate (teeth 
1-1.8 mm. high and 3-5 mm. broad), rounded at base but often with 
