322 ROBINSON. 
texture and ribbed nearly or quite to the gradually narrowed tip, the 
outer successively shorter and narrower.— Lit., synon., and exsice. 
as abo 
Var. caucense Robinson. Involucral scales subequal, tending to 
be oblanceolate, the upper portion less gradually attenuate and of 
softer more herbaceous texture, scarcely ribbed and dorsally more 
pubescent.—Proc. Am. Acad. liv. 238 (1918). E. ballotaefolium 
Hieron. in Engl. Bot. Jahrb. xxviii. 575 (1901), not precisely of HBK. 
Totima: dry open grass-land, “El Convenio,” west of San Lorenzo, alt. 
1000-1200 m., Pennell, no. 3453 (Gr.). : 
Hvis: common in scattered bushy places on savannahs, along the Rio 
Paez, Lehmann, no. 5675 (U. 8.). 
LE: under low isolated thickets, on savannahs near Anserma Nueva; 
alt. 1000 m., Lehmann, no. 3279 (Gr.). 
While such variation in the involucre is unusual in a single species, 
it has been found impossible to detect any concomitant differences n 
habit, foliage, florets, or achenes. Furthermore some approaches to 
the involucre of var. caucense have been observed in the variable 
Brazilian forms of the species. : 
81. E. humile (Benth.) Robinson, comb. nov. Low perennial 
herb; stems several, hirsute, leafy at the prostrate and somewhat 
repent base, then erect, almost leafless and scapelike, 1.5-2 dm. high; 
leaves opposite, petiolate, oval, obtuse or rounded at both ends but at 
the very base somewhat cuneate, crenately about 3-toothed on each 
side, densely hirsute on both surfaces, 4-12 mm. long, 3-10 mm. wide; 
petiole 2-7 mm. long; corymb terminal, about 3-4 cm. in diametef, 
convex; pedicels spreading-hirsute; heads about 20-flowered, 5-6 
mm. high, crowded; involucre campanulate, about 3-seriate; scales 
lanceolate, attenuate, very acute, thin-margined, 2—4-ribbed, at least 
the outer sparingly and rather coarsely pubescent on the back; 
receptacle, low-conical; corollas apparently whitish but perhaps blue, 
externally puberulent near the limb; achenes dark-gray, tapenng 
the callose base, rounded to the summit.— Conoclinium humile Benth. — 
Pl. Hartw. 199 (1845). 
02 
Cunpinamarca: in Cordillera de los Andes, near Bogoté, Hartweg, 29- it 
(N. Y., phot. Gr.) 
Known as yet only from the original collection. The leaves pe 
green on both surfaces, but are covered by coarse white atten 
mostly curved hairs. The prostrate portion of the stems has V 
