EUPATORirMS OF VFAEZr?:LA. 337 



j. Leaves thiokish and velvety or tinn and suhcoriare- 

 ous k. 



k. Heads in thyrsoid panicles; scales rountled or ob- 

 tuse at the somewhat narrowed tip; stem ^labrate 



19. E. morijolium. 

 k. Heads in a corymbosely branched flattish-topped 



panicle; scales acute; stem tomentose. . .20. E. Vargasianum. 

 j. Leaves thin and delicate, glabrous, rhombic-ovate 



21. E. tenuifolium. 

 i. Herbaceous perennial; heads 20-25-flowered. .22. E. pycnocephalutn. 

 a. Annual; leaves thin, ovate; heads small, in an open panicle 



23. E. microstemon. 



12. E. TOVARENSE Robinson (see p. 259). Branches slender, 

 virgate, leafy, sordidly puberulent; leaves opposite, short-stalked, 

 lance-oblong, attenuate-acuminate, cuneate at the base, feather- 

 veined, 7-11 cm. long, 2.8-3.3 cm. wide, remotely and obscurely 

 cuspidate-denticulate, membranaceous, green on both surfaces, gla- 

 brous above, puberulent on the veins and atomif erous beneath ; petiole 

 about 1 cm. long; panicle divaricately branched, leafy-bracted, 

 puberulent, its branches naked toward the base; pedicels 1-3 mm. 

 long; heads about 13-flowered, 6 mm. high, 3.5 mm. in diameter; 

 involucre campanulate; scales about 21, stramineous-scarious, 3-4- 

 seriate, dorsally puberulent toward the rounded tip, mostly 3-nerved 

 and 2^-ribbed; corollas 3 mm. long, microscopically granulate on 

 the outside of the limb, the proper tube about equalling the slightly 

 but distinctly enlarged throat; achenes 1.5 mm. long, black, slightly 

 papillose on the angles; pappus-bristles about 36, white, delicately 

 capillarv. — Merida: near Tovar, alt. 1200 m., Fcndlcr, no. 1947 

 (Gr.). ' 



13. E. Squiresii Rusby (see p. 258). Tall perennial herb or 

 virgate-branched shrub; stem smooth, green; leaves opposite, short- 

 petioled, oblong, narrowed to both ends, short-acuminate at apex, 

 usually rounded at base but sometimes slightly decurrent on the 

 petiole, repand-dentate, feather-veined, membranaceous, green on 

 both surfaces, glabrous throughout or sordid-puberulent on the mid- 

 rib and veins beneath, 9-22 cm. long, about half as wide; panicle 

 large, terminal, leafy-bracted to the middle, as much as 3 dm. long 

 and 2 dm. in diameter, its branches divaricate, some bearing heads 

 (on short secondary branchlets) almost or quite from the base; heads 

 about 22-flowered, 6 mm. high; involucre pale straw-colored and 

 scarious; scales in 3-4 series, graduated, dorsally somewhat pubescent 

 toward the rounded apex; corollas yellowish-white; achenes black, 

 1.3 mm. long. — Delta Amacuro: Paloma, Rushy (£• Squires, no. 2 

 (N. Y., Gr.). 



