1446 COXTRIBUTIOXS FROM THE XATIOXAL HERBARIUM 



I 



the j'ounger parts; leaves oblong or ovate-oblong, acute to acuminate, cuneate 

 at base, serrate, feather-veined, coriaceous, 10 to 20 cm. long, 3 to 6 cm. wide, 

 pellucid-punctate and -lineolate; heads numerous in rounded or ovoid, divari- 

 cately branched panicles, 5-fiowered, sessile; phyllaries stramineous, ovate to 

 narrowly oblong, obtuse; corollas white or purplish. 



18. Eupatorium hebebotryum (DC.) Hemsl. Biol. Centr. Amer. Bot. 2: 

 95. 1881, as hcbebotri/a. 



Critonia hebeboirya DC. Prodr. 5: 141. 1836. 



Morelos; type locality stated merely as Mexico. El Salvador, Guatemala, 

 and Costa Rica. 



Tree of medium size or tall shrub; branches curved, light brown or gray; 

 branchlets angled; leaves rhombic-ovate, acuminate, acute at base, crenate- 

 serrate, feather-veined or pinnately somewhat 5-nerved from above the base, 

 pellucid-punctate and -lineolate, 10 to 20 cm. long, 4 to 8 cm. wide; petioles 1.5 

 to 3 cm. long; branchlets of the dense ovoid thyrses tomentellous; heads small, 

 about 5-fiowered, slender-pediceled; ph\'llaries pale green to stramineous, obtuse 

 or rounded at tip. "Tamagua" (El Salvador). 



Wood used for construction in El Salvador. 



19. Eupatorium morifolium Mill. Card. Diet. ed. 8. Eupatorium no. 10. 1768. 

 Eupatorium populifolium H. B. K. Nov. Gen. & Sp. 4: 111. 1820. 

 Eupatorium critonioides Steetz in Seem. Bot. Voy. Herald 145. 1853. 

 Eupatorium megaphyllum Baker in Mart. Fl. Bras. 6-: 322. 1876. 

 Eupatorium sartor ii Schultz Bip.; Klatt, Leopoldina 20: 91. 1884. 

 Tamaulipas, San Luis Potosf, and Oaxaca; type from Veracruz. Widely 



distributed in Central and tropical South America. 



Shrub or stout herb 2 to 6 meters high; stems thick, costate, fistulose; leaves 

 suborbicular-ovate and rounded or subcordate at base, bluntly acuminate, 

 coarsely serrate, feather-veined or pinnately 5-nerved from somewhat above 

 the base, prominently reticulate beneath, coriaceous, mostly 10 to 20 cm. long 

 and 6 to 13 cm. wide, nearly glabrous at maturity; petioles 2 to 5 cm. long; 

 heads small, 6 to 13-flowered, in dense ovoid thj'rses; corollas greenish white; 

 phyllaries pale green or stramineous, ovate, obtuse, arachnoid-pubescent. 

 "Arbol de Santa Maria" (Veracruz); "taco," "chimaliote," "suelda con suelda," 

 "vara hueca," "carrizo" (El Salvador). 



20. Eupatorium hemipteropodum Robinson, Proc. Amer. Acad. 42: 39. 

 1906. 



"Eupatorium aromatisans DC.;" Millsp. & Chase, Field Mus. Bot. 3: 92. 

 1904. 



Yucatdn; type from Izamal. 



Robust perennial herb, probably becoming somewhat ligneous toward the 

 base; stems smooth, costate; leaves ovate, incisely serrate, membranaceous, 

 cuneately decurrent upon the upper part of the petiole; heads about 10-fiowered, 

 borne in ovoid thryses; phyllaries stramineous. "Chiople," "chiopk." 



The leaves are used for flavoring tobacco. An infusion of the leaves in alcohol 

 is applied externally for the relief of pain in rheumatism and kindred afifections, 

 and taken internally for stomach disorders. 



21. Eupatorium quadrangulare DC. Prodr. 5: 150. 1836. 



Sinaloa, Durango, Jalisco, Guerrero, and Veracruz; type from Tantoyuca, 

 Veracruz. Guatemala and El Salvador. 



Stout perennial, either herbaceous throughout or decidedly woody toward the 

 base, often (especially in the inflorescence) puberulent to rather copiously pubes- 

 cent or tomentellous; stems canelike, hollow, sharply 4-angled; leaves large, oppo- 

 site, ovate, acute, serrate, abruptly narrowed at base of blade to a broadly winged 

 petiolar portion, biauriculate at the insertion on the stem; heads mostly 8 to 



