52 ROBINSON 
cuneate base, thin-membranaceous, somewhat translucent, 3-nerved, 
sparingly pubescent (chiefly on the nerves), about 2-4 em. long, 
8-15 mm. wide; petioles terete, flexuous, 3-4 mm. long, covered with 
short delicate spreading purple-jointed hairs; cymes .5-14-headed, 
; cm. in diameter, terminal and on short spreading opposite 
branches, moderately dense but together forming an elongated loose 
panicle; heads about 7-flowered, 6 mm. long; pedicels slender, 
puberulent, 1-3 mm. long, involucral scales about 10, pale, stramin- 
eous, about 3—4-seriate, very unequal, mucronate from an obtusish 
summit, mostly 3-nerved, the outermost short, ovate, the intermediate 
oblong, the inner oblong-linear; corollas apparently white, subcylin- 
drical, slightly hispidulous on the short limb, otherwise smooth; 
achenes black, with pale yellowish-white angles, 1.5 mm. long, 
slightly tapering downward, sparingly granular or quite smooth, 
callous at the base; pappus-bristles about 16, delicate, white, smooth- 
ish.—Bull. Soc. Bot. Fr. xii. 81 (1865), nomen, & Linnaea, xxxiv. 
535 (1865-66), also without char. 
La Paz: Prov. Larecaja: in woods of the temperate region in the valley of 
Challasuya, near Sorata, alt. 2700-2800 m., 8 Apr., 1858, Mandon, no. 251 
(N. Y., phot. Gr.). 
Efforts to place satisfactorily this delicate plant in any hitherto 
described species have failed. Apparently Schultz was right in re- 
garding it as a novelty. Unfortunately the available material ex- 
hibits only the upper. (floriferous) part of two stems, leaving the pre- 
cise nature of the middle and lower cauline leaves unknown. It is 
believed, however, that as here keyed in among the related species of 
Bolivia the characters above given will amply distinguish it. 
25. E. marginatum Poepp. in Poepp. & Endl. Nov. Gen. ac Spec. 
iii. 54 (1845); Robinson, Proc. Am. Acad. lv. 68 (1919). 
_La Paz: Prov. North Yungas: Polo-Polo near Coroico, alt. 1100 m., Buch- 
tien, [Peru.] no. 3933 (N. Y.). 
This species is known to the writer from a rather hurried examina- 
tion of the type at the Natural History Museum in Vienna in 1905, 
and from a fairly clear photograph of it taken at that time. With 
this photograph, Dr. Buchtien’s no. 3933 shows close agreement. 
recently purchased by the New York Botanical Garden. They do 
not appear to the writer identical with the plant of Poeppig. ‘They 
