150 ERYTHEA. 
panulate, of 12 to 15 distinct coriaceous oblong-ovate acute 
bracts with recurved tips: receptacle strongly convex: rays 
12 to 15, linear-oblong, more than 4 inch long sharply 2 or 
3-toothed at apex: disk-corollas with narrow and nearly 
cylindrical 5-toothed limb twice the length of the short 
pubescent tube: achenes sharply. 4-angled, appressed-pilose; 
pappus conspicuous, of about 5 linear-oblong and as many 
narrower and much longer palew, all laciniate or serrate- 
toothed at least at summit. 
Foothills of the Sierra Nevada, in Amador Co., Calif, 
Geo. Hansen. 
Erigeron Heleniastrum. Perennial, the crown of the 
root sending forth occasional leafy runners, and one or more 
monocephalous sparingly leafy and scape-like stems a foot 
high, with weak decumbent base; herbage minutely glandular 
(the stem at least), and roughish with a short spreading 
pubescence: radical leaves 2 or 3 inches long, oblong- 
lanceolate, short-petioled; cauline broadly lanceolate, sessile, 
all entire, abruptly acute: heads ? inch high, 14 inches 
broad; narrowly linear and slenderly acuminate brownish- 
tipped involucral bracts very numerous, subequal, pilose- 
hispid: rays 40 to 50, golden- yellow, more than 4 inch long, 
about ? line wide, abruptly notched at summit: achenes 
pubescent; pappus-bristles rather few, very slender and 
fragile: style-tips short-conical, obtuse. 
Nevada de Toluca, Mexico, along streams at 12,000 ft. 
altitude, C. G. Pringle, n. 4239; distributed as a variety of 
Aplopappus stolonifer, DC., which it may well be, but it is 
manifestly another yellow-flowered LHrigeron, allied to 
E. aureus of British Columbian high mountains. 
Eupatorium Robinsonianum. Shrubby, slender, with 
numerous leafy and minutely pubescent flowering branchlets: 
leaves opposite, deltoid-ovate, an inch or more in length, 
serrate-toothed: corymbs small, terminal, sessile: involucre 
short-campanulate, 10 to 15-flowered, its bracts 10 or 12, 
oblong-linear, subequal: corollas pure white, the slender tube 
