TROPICAL AMERICAN EUPATORIEAE 41 
tosum by Baker looks in several respects different and suggests at 
least formal divergence. [Western Brazil.] 
Var. Rusbyanum Robinson. Much branched; stem, branches 
and lower surface of leaves tawny-tomentellous, the hairs short and 
curved; leaves ovate-lanceolate to rhombic-ovate, rather sparingly 
beset above with fine white subappressed hairs, beneath too densely 
tomentellous to disclose the underlying glandular punctation; heads 
about 18-flowered; involucral bracts very smooth and brown on the 
exposed portion, rounded or obtusely pointed at the closely appressed 
tip, ciliolate; achenes 2.5 mm. long.—Proc. Am. Acad. lv. 34 (1919). 
E. scabrum Britton, Bull. Torr. Bot. Club. xviii. 333 (1891), not L. 
E. Martiusii Ktze. Rev. Gen. iii. 148 (1898), not DC, 
a Paz: Prov. Larecaja: Guanai, alt. 610 m., May 1886, Rusby, no. 1628 
: sr Cruz: Prov. East Velasco, alt. 200 m., July, 1892, Kuntze (hs Sa 
This plant differs from E. scabrum L. considerably in the form and 
texture of the leaves as well as in the much shorter not obviously 
jointed pubescence. From this variety both var. Martiusu (DC.) 
Bak. and var. subvelutinum (DC.) Bak. may be distinguished by their 
sparser shorter pubescence and consequently conspicuous glandular 
punctation. From var. tomentosum the present variety differs in its 
distinctly smaller heads and fewer florets. ‘ 
9. E. extensum Gardn. Shrubby; stems terete opposite-branched, 
densely beset with widely spreading or defilexed transparent 
jointed attenuate bristle-like hairs (1-1.5 mm. long); leaves oppe’ 
site, rhombic-ovate to subdeltoid-ovate or -lanceolate, long-acuminate, 
cuneate or rather abruptly narrowed at the base, subentire cal 2-4- 
toothed on each side, 3-nerved from near the base, hispid-villous 
on both surfaces; primary branches of the inflorescence wide-spread- 
the summit a bracteate often 
umbelliform corymb; heads 40-50-flowered, rather short and thick 
the rounded or very obtuse tip, ciliate; corollas violet; igs 09 
bristles about 40, stramineous.—Gardn. in Hook. Lond. Journ. t. 
vi. 440 (1847); Britton, Bull. Torr. Bot. Club, xviii. 333 (1891). 
La Paz: Prov. Larecaja; Guanai, alt. 610 m., Rusby, no. 1627 (N. Y.). 
[Brazil.] 
10. E. Bangii Rusby. Herbaceous perennial, 4-6 dm. high, sub- 
erect from a decumbent base, covered with a soft rather long widely 
