STANDLEY — TEEES AND SHRUBS OF MEXICO 1443 



2a. Eupatorium pulchellum var. angustifolium S. Wats.; Pringle, PI. 

 Mex. 1889: 2nd [unnumbered] page of printed list. 1889; Robinson, Proc. 

 Amer. Acad. 51: 534. 1916. 

 Known only from the type station, near Guadalajara, Jalisco. 

 Leaves longer (8 to 11 cm. in length) and relatively narrower (1 to 2 cm. in 

 width) than in the typical form, subentire. 



3. Eupatorium glaberrimum DC. Prodr. 5: 144. 1836. 



Known only through the type collection, from Mexico without stated locality, 

 presumably from Guerrero. 



Shrub, smooth throughout; stem round; leaves obovate-oblong, acuminate, 

 narrowed below to an obtuse subsessile base, serrate, feather-veined, 12 to 17 

 cm. long, about a third as wide; heads about 20-fiowered, cylindric, corymbose, 

 pediceled; phyllaries closely appressed, rounded at tip. 



3a. Eupatorium glaberrimum var. m.ichelianum Robinson, Contr. Gray 

 Herb. n. ser. 68: 18. 1923. 



Eupatorium michelianum Robinson, Proc. Amer. Acad. 41: 276. 1905. 



Stems, inflorescence, and leaf midribs beset with spreading dark hairs; leaves 

 mostl}' narrower than in the typical form; corollas white. 



4. Eupatorium lozanoanum ^ Robinson, Proc. Amer. Acad. 41: 275. 1905. 

 Hidalgo; type collected in a barranca below Trinidad Iron Works. 

 Branching shrub, 3 to 4 meters high, smooth throughout; leaves lance-ovate, 



caudate-acuminate, sharply but rather remotely serrate, pinnately 5-nerved 

 from near the base, 8 to 10 cm. long, 2 to 3 cm. wide, short-petioled; heads 

 4-flowered, subsessile by 3's or 5's at the tips of the panicle branchlets; involucre 

 cylindric, several-seried; phyllaries thin, green, acutish. 



5. Eupatorium conzattii Greenm. Proc. Amer. Acad. 34: 574. 1899. 

 Veracruz; type locality, "in humid forests on the Cerro del Chiquihuite, 



Colonia Melchor Ocampo, alt. 1300 m." 



Glabrous, somewhat lucid, probably shrubby; stems slightly compressed, 

 6-angled; leaves opposite, oblong, acuminate, serrate, thickish, apt to be rugose, 

 dark green on both faces, pinnately 5-nerved, the outer pair of nerves small, 

 intramarginal, the others prominent; blade 9 to 14 cm. long, 3.5 to 5 cm. wide; 

 petiole slender, about 1.5 cm. long, slightly winged toward summit; panicle 

 large, terminal, divaricately branched; heads mostly sessile and clustered at 

 tips of the branchlets; phyllaries round-tipped, glabrous, yellowish brown, striate. 



6. Eupatorium bertholdii^ Schultz Bip. in Seem. Bot. Voy. Herald 299. 1856. 

 Tepic; type locality. Sierra Madre. 



Shrub, pubescent or puberulent; stems round, distinctly ligneous, becoming 

 1 cm. or more in diameter; leaves ovate, acute to acuminate at apex, acutish at 

 base, shallowly serrate to entire, 3-ribbed from above the base, sparingly pubes- 

 cent on the upper surface, reticulate beneath, 5 to 13 cm. long, 1.5 to 5 cm. wide; 

 petiole 1 cm. long; heads 10 to 13-flowered, sessile to short-pediceled, paniculate; 

 involucre slender; phyllaries obtuse to rounded, striate, stramineous to brownish 

 or purplish-tinged. 



6a. Eupatorium bertholdii var. stenophyllum Robinson, Proc. Amer. Acad. 

 35: 331. 1900. 



Jalisco; type from canyons near Guadalajara. 



Leaves of firmer texture, lance-ovate, scarcely one-fourth as wide as long, 

 entire. ^___ 



1 Filem6n L. Lozano, for several years a field-assistant of C. G. Pringle in his 

 botanical exploration of Mexico. 



2 Dr. Bertliold Seemann, 1825-1871, naturaUst on the voyage of the Herald 

 (1845-1851). 



