1466 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM 



long, half as wide; petioles 2 to 5 mm. long; corymbs umbelliform, terminal, lax. 

 mostly 3 to 5-headed; heads 25 to 30- flowered, about 1 cm. high; phyllaries oblong, 

 acute, the outer dark purple, originally described as glabrous, but apparently in 

 conspecific material thinly villous; pappus roseate. 



109. Eupatorium aschenbornianum Schauer, Linnaea 19: 720. 1847. 

 Eu-patorium donnell-smUhii Coulter, Bot. Gaz. 16: 95. 1891. 

 Eupatorium donnell-smithii var. parvifoUum Coulter, Bot. Gaz. 16: 96. 1891. 

 Kyrstenia donnell-smithii Greene, Leaflets 1: 9. 1903. 



Veracruz, Puebla, Michoacdn, and Mexico; type from the valley of Toluca. 

 Central America. 



Described as shrubby, but apparently a scarcely lignescent perennial herb, 30 

 to 60 cm. high, copiously spreading-pubescent, the trichomes moniliform with 

 dark purple nodes; stems terete, with white pith; leaves suborbicular-ovate, 

 acuminate, serrate, obtuse to rounded or distinctly cordate at base, softly mem- 

 branaceous, 3 to 8 cm. long, 2.5 to 6.5 cm. wide; petiole 1 to 3 cm. long; corymbs 

 compound, terminal, often 30 cm. broad; heads 20 to 40-flowered; phyllaries 

 linear, subscarious, lacerate-ciliate toward tip; corollas white or nearly so, hispid 

 near the limb. 



Specimens apparently belonging to this species have been confidently referred 

 by Schultz-Bipontinus (in herb.), Klatt (in herb.), and Hemsley (Biol. Centr. 

 Amer. Bot. 2: 93. 1881) to the earlier and little known E. ciliatum Less., but the 

 latter species is shown by its type to have smaller, relatively shorter-petioled 

 and more incisely toothed leaves with a short but sharp basal acumination. It 

 is described by Lessing (Linnaea 6: 404. 1831) as herbaceous and as having 

 glabrous corollas. 



110. Eupatorium etlense Robinson, Contr. Gray Herb. n. ser. 75: 6. 1925. 

 Type from Las Sedas, Distrito de Etla, Oaxaca, altitude 1,900 meters. 

 Slender-branched shrub; stems terete, smooth, grayish buff; branches when 



young slightly hexagonal and puberulent, soon glabrate; leaves opposite, slender- 

 petioled, ovate, obtuse to subacuminate, crenate-serrate, rounded or subcordate 

 at base, 2.5 to 6 cm. long, 2 to 4.3 cm. wide, sparingly puberulent above, pubescent 

 beneath, chartaceo-membranaceous, the closely netted veinlets beautifully trans- 

 lucent; corymbs terminal, rounded; heads about 23-fiowered, 8 mm. high; phyl- 

 laries in about 3 series, gray-pubescent; corollas white. 



111. Eupatorium scorodonioides A. Gray, Proc. Amer. Acad. 15: 27. 

 1879. 



Exipatorium scorodonioides var. grossedentatum Robinson, Proc. Amer. Acad. 

 35: 340. 1900. 



Central Mexico from Coahuila to Veracruz and Zacatecas; type from rocky 

 hills near San Luis Potosi. 



A hard-wooded shrub 0.9 to 1.8 meters high, copiously and usually fastigiately 

 branched, grayish-tomentellous to -tomentose; leaves opposite, deltoid, cordate, 

 acute or acutish, finely or coarsely crenate-dentate, paler beneath, 3-nerved from 

 the base, 1.5 to 5 cm. long, rarely over 3 cm. wide; petiole mostly less than 1 cm. 

 long; heads about 1 cm. high, long-pediceled, in fastigiate corj-mbs; phyllaries 

 lance-linear to linear, attenuate, herbaceous, gray-pubescent, nearly equaling the 

 florets; corollas white. 



112. Eupatorium petiolare Moc; DC. Prodr. 5: 166. 1836. 

 Bustamenta cordata Alaman; DC. Prodr. 5: 166. 1836. 

 Widely distributed from Coahuila and Tamaulipas to Oaxaca. 



Shrub 0.9 to 1.5 meters high, with terete, thickish, pithy, and brittle stems; 

 cortex when young tomentellous; leaves opposite, triangular-ovate to suborbicu- 

 lar-ovate, acuminate, crenate-dentate, mostly cordate at base, 6 to 10 cm. long and 

 4 to 7 cm. wide; petiole mostly 2 to 6 cm. long; corymbs dense, often lateral as 



