TROPICAL AMERICAN EUPATORIEAE 27 
species, with smaller heads, less herbaceous involucre, and prominu- 
lent veinlets, appears to be certainly distinct. 
3. O. eleutherantherus (Rusby), comb. nov. Eupatorium eleu- 
therantherum Rusby, |. e. iii. no. 3, 53 (1893); Buchtien, Contrib. Fl. 
Boliy. 189 (1910); Weberbauer, Veg. der Erde, xii. 181 (1911).—Bot- 
VIA: vicinity of La Paz, alt. 3050 m., Bang, nos. 27 (Gr., Ni Ya 
S., Mo.), 193 (Gr., N. Y., K.); also Buchtien, no. 977, ace. to Buch- 
tien, |. c.—Perru: in the central Peruvian sierra-zone, ace. to Weber- 
bauer, I. c. This species was by Hieronymus in Engl. Bot. Jahrb. 
xxii. 707 (1897) reduced without question to the following species 
but, after the examination of several specimens of each, there 
appear to be a number of slight differences which in conjunction 
warrant independent treatment at least pending proof of actual 
intergradation. 
4. O. oRIGANOIES (Meyen & Walp.) Hieron. in Engl. Bot. Jahrb, 
xxii. 707 (1897); Robinson, Proc. Am. Acad, xlii. 23 (1906). Eupa- 
torium origanoides Meyen & Walp. Nov. Act. Acad. Caes.-Leopold. 
xix. Suppl. I. 257 (1843). E. heptanthum Sch.-Bip. Bonplandia, iv. 
54 (1856), nomen; Sch.-Bip. ex Wedd. Chlor. And. i. 217 (1857), 
where described; Bull. Soc. Bot. Fr. xii. 82 (1865), & Linnaea. 
xxxiv. 536 (1865-66); Robinson, I. e. lv. 75 (1919); not Rusby, Bull. 
N. Y. Bot. Gard. iv. 378 (1907).—Perv: Azangaro, Lechler, no. 
1751 acc. to Sch.-Bip.; in plains around Tacora, alt. 4200-5000 m., 
Meyen (Berl., phot. Gr.); Cordillera de Tacora, Weddell; Puno, 
Weberbauer, no. 1366 (Berl., fragm. Gr.); west slope of Misti, Are- 
quipa, Weberbauer, no. 1426 (Berl., fragm. Gr.). Botrvia: in stony 
places of the alpine region, Omasuyos, Dept. La Paz, alt. 4000 m., 
Mandon, no. 260 (Gr., N. Y. in part); Isla Titacaca (Isla del Sol), in 
Lake Titacaca, alt. 3840 m., Buchtien, no. 3022 (Gr., N. Y.). 
This species is here interpreted (as successively by Steetz, by 
Klatt, and by Hieronymus) in the light of a Meyen specimen from 
Tacora preserved in the Berlin Herbarium. Although thought to be 
a part of the type-material or at least of the original collection, this 
specimen does not fully accord with the description, which calls for 
an herbaceous plant with glabrous involucral scales and cordate- 
ovate leaves. However, an attentive reading of Meyen & Walpers’s 
diagnosis discloses such evidence of haste and carelessness as to 
destroy all confidence in its detailed accuracy. Thus, for instance, 
the leaf-blade is said to be “utrinque glabra,” but at another point 
the leaves are described as “ ferrugineo-tomentosis” on the nerves. 
It seems best therefore to discount to some extent the described 
