EUPATORIUMS OF PERU. 49 
d, Leaves ovate or elliptical. 
Heads about 16-flowered; involucral scales obtuse 
wid 
eaves emties vate, 34.5 cm. wide..... 31. E. ielianthifolium. 
Heads 20—24-flowered; involucral scales acute; lea 
elliptical, at mate rity about 1 dm. wide....... 32. E. vestitum. 
c. Leaves glabrous or merely atomiferous beneath. 
Heads in a peter il branched “oytaaiaad sii a 
lent retieniaon above Ce or ial aes ea 33. E. orepaleiden: 
prominulent oa the upper surface of the’ serrate leaves 
Involucral scales conspicuously arachnoid-ciliate; 
leaves dull above, 1.5-2.3 em. wide.......... 34. F. drepanoides. 
ue scales minutely ae obscurely ciliolate; 
s lucid above, 3-6 cm. wide............ 35. E. coelocaule. 
Leaves anions tatice Stn o eae sessile or on very 
short petioles (1-4 mm. long) 
ae rge, 1.4—2.5 em. lon: 
volucral scales reaularly ‘graduated in 3-4 series; 
heads 1.4-1 
Leaves linear, aban pig oy ele Beg Oy ey 18. E. Gayanum, 
Leaves lance-oblong, 8-15 m Wie... 19. EZ. Ballii. 
Involucral scales much ‘shelter but the outer wear 
shorter; heads. 2.5 om. long. . oe . E. Cursonit. 
. high 
f. Heads mostly _ 30-40-flowered, in loosely fastigiate- 
tanched palite. 0s eis ee a 36. E. amygdalinum. 
f. Heads senate mostly in dense thyrsoid inflo- 
rescen 
g. pasieat linear or nearl wide. 
Leaves ines de bac aaa glabrate and 
smoothish (not conspicuously rugose-bullate) 
above, entire (the margins Priaag — 
. E. air dance 
Leaves. ek er pada’ glabrate ae stron: 
ullate above, appearing crenulate ated 
the iis epresse va in the very revolute 
WHAPHIAA bs ol a oe a ee ee 22. E. chotense 
g. Leaves narrowly lance-oblong, 1-2 em. wide in 
the middle. 
Shrubs 1-2 m. high; leaves thickish, of firm texture, 
chartacsoud OF COMIBKOOGS: ans 23. E. Volkensii. 
pape on or nearly so, 2-3 dm. high; leaves thin, 
ranaceous, ihe ole texte, oe. sss: 37. E. Sprucei. 
Leaf-blade ¢ Sakracine below i inal petiolar por- 
_ either cuneate or Soiate atedaee at its insertionon 
Heads 14-17-flowered; leaves entire, tomentulose beneath. 
Heads about 20-flowered; leaves coarsely toothed or lobed, 2 
coarsely pubescent on the veins beneath......... 39. ‘ommersonit. 
e 
base, or subpinnately veined, but with one of the lower pairs 
of veins considerably longer or thicker than the others h. 
ered 
h. Heads 4~7-flow 
