
COLOMBIAN EUPATORIUMS. 297 
Hurza: Cordillera Oriental, east of Neiva, Rusby & Pennell, no. 1049 (N. Y.). 
Antigquia: Cordillera Central, near Medellin, alt. 1600 m., Mayor, no. 577 
acc. to Heering, I. c., as E. Schiedeanum. 
INAMARCA: in thickets near Pacho, alt. 1600-2200 m., Lehmann, no. 
7496 (N. Y.); Cordillera Oriental, above Bogotd, alt. 2500 m., Mayor, no. 54, 
ace. to Heering, 1. c. 
ALITY: Triana, nos. 1183 (K.) and 1189 (K.). 
[Southwestern U. S., Mex., Cent.-Am., Venezuela.] 
Common and weed-like, with the habit of Ageratum. Fairly con- 
Stant in inflorescence and floral character, but through considerable 
and apparently independent variation of several features (notably the 
shape, texture, and pubescence of the outer scales of the involucre) 
passing into many preceptibly different yet not readily delimitable 
forms not as yet correlated with habitat or range. The early attemp 
by Schrader and by DeCandolle to divide the plant specifically or 
varietally appear on examination of the material now available te 
break down entirely. It is unaccountable that a plant so common 
and widely distributed in the warmer parts of America should have 
So completely escaped the notice of the earlier collectors including 
Humboldt & Bonpland. 
42. E. Klattianum Hieron. A soft-woody shrub with weak 
ding or drooping rusty-pubescent branches; leaves subopposite, 
deltoid-ovate, cordate, membranaceous, crenate-serrate, 3 cm. long, 
nearly as wide, acuminate, puberulent above, rusty- or sordid-pubes- 
cent beneath; petiole (of the upper cauline leaves) about 1 cm. long; 
inflorescence and heads as in the preceding; florets greenish-white and 
fragrant (Lehmann); achenes entirely glabrous.— Hieron. in Engl. 
Bot. Jahrb. xxviii. 573 (1901). E. umbrosum Klatt in Engl. Bot. 
Jahrb. vili. 35 (1887), not Benth. — 
Cunpivamarca: in open woods about Pasca, alt. 2000 m., Lehmann, no. 
2520 (Gr.). 
Notwithstanding its reported shrubby character, white florets, and 
achenes, this species corresponds so closely in many minor 
features with the preceding as to suggest at least very recent common 
origin if not varietal relationship. 
43. E. Pennellii Robinson. Erect perennial herb, 1.5 m. high, 
nigrescent in drying: stem terete, entirely glabrate at maturity, 
Purple, its internodes 1-1.5 dm. long; leaves opposite, slender- 
Petioled, ovate, long-acuminate, rounded at the base, rather finely 
Serrate (teeth 14-18 on each side, 0.7 mm. high, 1.5-2.5 mm. broad), 
