1448 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM 



Shrub 1 to 5 meters high; stems and branches terete; leaves deltoid-ovate, 

 acuminate, mostly crenate to serrate, rarely subentire, at base cuneate, or more 

 often abrupt or rounded or even subcordate, firmly membranaceous, green on 

 both sides, obscurely puberulent to spreading-pubescent, at least on the nerves 

 beneath, 5 to 10 cm. long, 3 to 7 cm. wide, glandular-punctate beneath; petiole 

 slender, 1 to 3 cm. long; heads 24 to 46-flo\vered, about 8 mm. long, somewhat 

 fastigiately grouped in round-topped corymbs, mostly slender-pediceled; corollas 

 white; phyllaries lanceolate to oblong, mostly obtuse. "Cuilotillo" (Kerber) ; 

 "vara blanca," "vara de cama," "arnicacho" (El Salvador). 



The vernacular names "hierba del dngel" and "yolochichitl" have been 

 reported for this species. The plant is said to be bitter and aromatic and to be 

 employed locally for affections of the liver and digestive system. It is reported 

 also that the leaves have been employed as a substitute for hops in the brewing of 

 beer. The same properties and uses are reported for several related species. 



28. Eupatorium neaeanum DC. Prodr. 5: 160. 1836. 



Guerrero, Oaxaca, and Chiapas; type collected near Acapulco. Guatemala (?). 



Shrub, in habit and foliage much resembling the preceding species, but more 

 robust; branchlets and inflorescence densely white-tomentose; pedicels short, 

 thick; heads about 25-flowered; corollas white; phyllaries broadly oblong or 

 elliptic, obtuse or acutish. 



29. Eupatorium longipes A. Gray, Proc. Amer. Acad. 15: 26. 1879. 

 Bulbostylis pedunculosa DC. Prodr. 5: 138. 1836. 



Eupatorium pedunculosum A. Gray, PI. Wright. 1: 86. 1852; Hemsl. Biol. 

 Centr. Amer. Bot. 2: 97. 1881. Not E. pedunculosum Hook. & Arn. 1836. 



San Luis Potosf, Hidalgo, and Michoacdn; type locality, "Mexico circa Villa- 

 pando." 



Fruticulose, many-stemmed from a branching, usually decumbent, slightly 

 woody base; stems slender, flexuous, 20 to 40 cm. high; leaves opposite (or the 

 uppermost alternate), oval to ovate-lanceolate, about 1 cm. long, 4 to 7 mm. 

 wide, obtuse, 1 or 2-toothed on each side or entire, narrowed at base to a short 

 petiole; heads terminal, solitary, about 14 mm. high, about 25-flowered, on 

 peduncles 1.5 to 10 cm. in length; phyllaries oblong, acute, cuspidate, purple- 

 stained on the exposed part. 



30. Eupatorium palmeri .\. Gray, Proc. Amer. Acad. 21: 383. 1886. 

 Eupatorium arborescens Jones, Contr. West. Bot. 12: 43. 1908. 



Sonora, Chihuahua, Sinaloa, Jalisco, and Colima; type locality, "shady places 

 high up in mountains above Batopilas." 



Slender branching shrub, at times becoming arborescent; leaves ovate and 

 ovate-lanceolate, acuminate, serrate, rounded at base, mostly 5 to 7 cm. long 

 and 2.5 to 4 cm. wide, membranaceous, subglabrous above, softly pubescent at 

 least on the nerves and veins beneath, 3 to 5-nerved from near the Ijase; petiole 

 about 1 cm. long; heads 8 to 10-flowered, 4 mm. long, subsessile or shortly pedi- 

 celed in loose pyramidal leafy-bracted panicles; phyllaries lanceolate. 

 30a. Eupatorium palmeri var. tonsum Robinson, Proc. Amer. Acad. 42: 43, 

 1906. 



Known only from the type locality, Bl Ocote, near the boundary between 

 Michoacdn and Guerrero. 



Leaves glabrous on both surfaces, longer and much more gradually caudate- 

 acuminate than in the typical form, as much as 14 cm. long and 4 cm. wide. 



31. Eupatorium solidaginifolium A. Gray, PI. Wright. 1: 87. 1852. 

 Chihuahua, Coahuila, and Durango. Type locality, "mountains between the 



Limpia and the Rio Grande" in western Texas; also Arizona and probably New 

 Mexico. 



