EUPATORIUMS OF PERU. 43 
specific, and varietal descriptions in the author’s recent paper on the 
Eupatoriums of Colombia, Venezuela, and Ecuador. In the case of 
Peruvian species and varieties not occurring in any of these countries 
and therefore not described in the paper just mentioned, diagnoses are 
here given. Thus, by the use of the two papers together, anyone 
desiring to identify a Peruvian Eupatorium will be able to consult a 
fairly detailed diagnosis of each species and variety of the genus thus 
far known from the country. 
Sect. I. CyzinprocerHaLa DC. (See Robinson, Proc. Am. Acad. 
liv. 270.) 
Key TO SPECIES. 
a. paca arr wsagresieees considerably altered in texture 
a at spreading at the subtruncate or very bluntly 
pointed sa leaves linear or narrowly oblong, nearly or quite 
seks E. ivaefolium. 
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b. Heads solitary, pie ees 7 scabrous above, 
glabrous beneath; habit of § Pravelis.........-.-- 2. E. serratuloides. 
b. Hea corymbose or ¢ orepaneulate leaves never 
pubescent ae if glabrous beneath 
¢. ae ats wered; leaves se lanceolate, 2.5- 
3. E. eripsimum. 
rad 
Piombic: acute at both ends, — ee es E. laevigatum. 
d. Pedicels bss developed) pubescen 
eads very slender, 7—10-flowered, oie in bud f. 
“Tavoluere essentially glabrous; leaves attenuate- 
cuneate at base, mostly thin and se in 
ee ere ee ee a . leptocephalum. 
cent, especially toward the dark and mu- 
seni tip; leaves subrotund or ony shortly 
— at base, pemenen ese S drying — 
g. Heads ‘about 8 mm. long, borne in a leafy ng 
icle; leaves 1.5-4 em. long; petioles 14 
ong E.s dem, . Rusbyanum. 
g- Heads 1-1. meter leaves 6-10 em. —— on 
