46 ROBINSON 
equalling the tube, glabrous but slightly papillose-granulate; achenes 
black, tapering toward the base, 2.5 mm. long, roughened on the 
angles; pappus-bristles about 33, nearly equalling the corolla, slightly 
barbellate or scabrid——Comp. Bot. Mag. i. 240 (1836); Hieron. in 
Engl. Bot. Jahrb. xxii. 773 (1897); R. E. Fries, Arkiv fdr Bot. v. no. 
13, p. 8 (1906). E. virgatum D. Don ex Hook. & Arn. |. ¢. 241 (1836). 
E. pinnatifidum DC. Prod. v. 149 (1836). E. pinnatifidum var. 
virgatum (D. Don) Bak. in Mart. Fl. Bras. vi. pt. 2, 321 (1876), as 
virgata. E. buniifolium, var. Bakeri Ktze. Rev. Gen. iii 146 (1898). 
Santa Cruz: Sierra de Santa Cruz, alt. 1000 m., Kuntze (N. Y., phot. 
TARISA: on open hill, Tarija, alt. 1900 m., Fries, no. 1219, ace. to Fries, 
[Northern Argent., Uruguay, southern Braz.] 
Varying considerably in the rigidity and size of the leaves and par- 
ticularly in the degree to which they are pinnatifid. Hieronymus, 
I. c., has pointed out the leading tendencies in this variation but has 
wisely refrained from applying names to the resulting forms. 
14. E. bupleurifolium DC. Erect, virgate to rather copiously 
branched, 1-1.3 m. high; stem and branches terete, somewhat 
lignescent, very leafy, at first sordid- or fulvous-puberulent, soon 
quite glabrate; internodes short 3-18 mm. long; leaves chiefly 
opposite (the upper alternate) sessile, linear or narrowly lance-ob- 
long, entire or more often shallowly and rather sharply serrate es- 
pecially toward the middle of each edge, attenuate, 5-12 cm. long, 
2-10 mm. wide, subcoriaceous, with a moderately prominent midrib 
and 2 or more elongated lateral anastomozing veins, glabrous on 
both surfaces, somewhat paler beneath; corymb at first very dense 
and subglobose, at length fastigiately branched, flattish or only 
moderately convex, dense; heads 5-flowered, about 6 mm. high, 
short-pedicelled; involucre campanulate, about 3-seriate; the scales 
very unequal, glabrous, rounded at the granular tip; corolla apparently 
whitish, about 4.5 mm. long, sparingly glandular-atomiferous near 
the limb; achenes tapering downward, sparingly glandular-atomi- 
ferous, about 2 mm. long; pappus-bristles about 32, yellowish-white, 
lucidulous, nearly smooth.—Prod. v. 149 (1836); Bak. in Mart. Fl. 
Bras. vi. pt. 2, 332, t. 87 (1876); Hieron. in Engl. Bot. Jahrb. xxi. 
777 (1897), where several varieties are distinguished. FE. Sonderi 
Sch.-Bip. Linnaea, xxii. 571 (1849), & xxx. 182 (1859-60) ace. to 
Bak. l. ec. E. Mandonii Sch.-Bip. Bull. Soc. Bot. Fr. xii. 81 (1865), 
nomen, & Linnaea, xxxiv. 533 (1865-66), where briefly described. 
