TROPICAL AMERICAN EUPATORIEAE 37 
Santa Cruz: Sierra de Santa Cruz, Kuntze (N. Y.). 
3. E. ivaefolium L. Syst. ed. 10, 1205 (1759), as iuaefolium; 
Amoen. Acad. v. 405 (28 Nov. 1759), as ivifolium; Sp. Pl. ed. 2, ii. 
1174 (1763); Robinson, Proc. Am. Acad. liv. 275, 333 (1918), lv. 44 
(1919). E. fasciculare Poepp. in Poepp. & Endl. Nov. Gen. ac Spee. 
54 (1845); Ktze. Rev. Gen. iii. pt. 2, 147 (1898). E. guanaiense 
Britton, Bull. Torr. Bot. Club, xviii 333 (1891); Rusby, Mem. Torr. 
Bot. Club, iii. no. 3, 53 (1893). 
La Paz: Prov. Larecaja: Guanai, Rusby, no. 1735 (N. Y.); Prov. Yungas: 
Bang, no. 417 (Gr., N. Y., U. S., Mo.); Prov. North Yungas: Polo-Polo, 
near Coroico, Buchtien, no. 240 (Gr., N. Y., Mo. 
Santa Cruz: Prov. Sara: Yapacani, alt. 400 m., Kuntze (N. Y.). 
DEPT. Not IDENTIFIED: Machichoirisa, R. S. Williams, no. 1612 (N. Y.). 
This species has a wide range from Florida to Brazil and Peru. 
While retaining its essential features with considerable fidelity it 
varies much in stature, size of leaves, size of heads, and degree to 
which the tips of the involucral scales are squarrose. A slender 
form with sniall leaves is frequent in the drier parts of Brazil, etc., 
and has been characterized as var. ExTRORSUM (Sch.-Bip.) Bak. in 
Mart. Fl. Bras. vi. pt. 2, 290 (1876) as extrorsa. This slender form 
occurs in Bolivia as follows: Santa Cruz: Prov. Chiquitos: d’Or- 
bigny, no. 676 (Gr.). The most northern form in Florida and Mexico 
tends to have thinner leaves and shorter heads. ‘The most luxuriant 
tropical form in Bolivia tends, on the other hand, to have large and 
thickish leaves and somewhat longer heads, but not more so than in 
some Central American specimens. Satisfactory distinctions, even 
for varietal division, other than those of mere luxuriance, have not 
been found. In all forms the roots are of fasciculate long tough dark 
fibres. 
4. E. squarroso-ramosum Hieron. Perennial herb, 5-10 dm. 
high; stems slightly striate-sulcate, pubescent and glandular, branched 
from base; branches many, squarrose, leafy to the loose subcorym- 
bose inflorescence; internodes sometimes as much as 1 dm. long; 
leaves opposite, rhombic-ovate (the upper lanceolate), acute, sub- 
crenate-serrate with 3-6 teeth on each side, narrowed at base, mem- 
branaceous, somewhat pilose or roughish-pubescent on both surfaces, 
5-6 em. long, 2.5 cm. wide, with 2-4 pairs of pinnately disposed lateral 
veins, the lowest pair somewhat the most prominent and nerve- 
like; petiole 5-10 mm. long; branchlets of the panicle divaricate; 
pedicels 5-20 mm. long, sparingly pilose; involucre 7-8 mm. long, 
4-5 thick, campanulate-subcylindric, about 6-seriate; the inner 
