STANDLEY TREES AND SHRUBS OF MEXICO 1457 



oblong, falcate-acuminate, serrate to subentire, 3-nerved from above the rounded 

 base, 5 to 12 cm. long, 1.5 to 4 cm. wide, subcoriaceous; petiole mostly 8 to 13 

 mm. long; heads about 7 or 8-fio\vered, in dense rounded short-peduncled corymbs; 

 phyllaries lance-linear, acute, much shorter than the florets; corollas tubulate, 

 slender, pale. 



67. Eupatorium ymalense Robinson, Contr. Gray Herb. n. ser. 75: 14. 1925. 

 Eupatorium albicaule var. laxius Robinson, Proc. Amer. Acad. 35: 330. 1900. 

 Sinaloa; type from Ymala. 



Tall shrub with firm, light gray bark; leaves opposite, ovate-oblong, acumi- 

 nate, entire, thin, membranaceous, almost glabrous, 3-nerved from slightly above 

 the rounded base, 7 to 12 cm. long, 3 to 6 cm. wide; petiole slender, 5 to 9 mm. 

 long; panicles pedunculate, lateral and terminal, ovoid, about 6 cm. in diameter; 

 heads pediceled, about 13-flowered, 8 to 10 mm. high; phyllaries linear, attenu- 

 ate, dorsally puberulent; corollas pale, almost tubular, granulate. 



68. Eupatorium glischrum Robinson, Proc. Amer. Acad. 54: 245. 1918. 

 Known only from the original collection obtained on the summit of the Sierra 



de Parras, Coahuila. 



Glutinous shrub with opposite, ascending, flexuous and nodulose branches; 

 leaves oblong-lanceolate, obtuse, slightly cuspidate at tip, cuneate at base, entire, 

 3-nerved, glabrous and vernicose on both surfaces, 2 to 3.5 cm. long, 5 to 10 mm. 

 wide; petiole 2 to 6 mm. long; heads 4 to 6-flowered, in small dense convex corymbs 

 scarcely surpassing the leaves; phyllaries narrowly oblong, obtuse; corollas 

 purplish. 



69. Eupatorium areolare DC. Prodr. 5: 169. 1836. 

 Eupatorium tubiflorum Benth. PI. Hartw. 76. 1841. 

 Eupatorium brevisetum DC. Prodr. 5: 169. 1836. 



Michoacdn and Chiapas; type from the Guachilaca Mountains. Guatemala. 



Slender-branched shrub 3 to 5 meters high, shortly purplish-velvety on branch- 

 lets, petioles, and inflorence; leaves opposite, ovate to ovate-oblong or ovate- 

 lanceolate, gradually acuminate to a usually falcate tip, serrate, rounded to shal- 

 lowly cordate at base, finely areolate above, paler, reticulate, and crisped-pubes- 

 cent to tomentellous beneath, 6 to 13 cm. long, 3 to 6 cm. wide; petiole 1 to 1.5 cm. 

 long; heads 12 to 20-flowered, in dense rounded terminal and stalked axillary 

 corymbs (much shorter than the leaves) ; corollas white, with long tubular throat 

 and much exceeding the narrow acute pubescent phyllaries. 



70. Eupatorium brevipes DC. Prodr. 5: 168. 1836. 

 Kyrsienia brevipes Greene, Leaflets 1: 9. 1903. 



San Luis Potosi to Oaxaca, Michoacdn, and Durango. 



Erect shrub 1.5 to 2.5 meters high with virgate leafy branches; leaves opposite 

 and alternate, shortly petioled, lance-oblong to narrowly ' oval, acuminate to 

 (rarely) obtuse, crenate-serrate from near the middle outward, 3-nerved, 3 to 

 8 cm. long, 8 to 25 mm. wide, scabrid-puberulent above, grayish-puberulcnt to 

 subtomentellous beneath; heads about 20 to 25-flowered, in strongly convex to 

 ovoid corymbs; phyllaries linear, acute, dorsally pubescent; corollas white or 

 nearly so. "Chamiso" {Seler). 



71. Eupatorium liebmannii Schultz Bip.; Klatt, Leopoldina 20: 75. 1884. 

 Eupatorium hirsutum DC. Prodr. 5: 170. Sept. 1836. Not E. hirsutum Hook. 



& Arn. March, 1836. 



Eupatorium pseudo-Mr sutum Hieron. Bot. Jahrb. Engler 22: 758. 1897. 



Oaxaca and Morelos; type from Planlanito. 



Virgate-branched shrub with habit like the preceding but leaves oblanceolate to 

 narrowly oblong, strongly discolorous, canescent-tomentose beneath, and feather- 

 veined instead of 3-nerved; corollas white or pink-tinged. 



