152 Robinson and Greennan—Mexican Plants. 
greatly in size, the larger an inch in diameter on petioles of 
equal length ; the blade cordate, orbicular in outline ; the margin 
shallowly and palmately sinuate-lobed and lobes toothed: heads 8 
to 9 lines in diameter.—-Collected by OC. G. Pringle, growing in 
crevices of dry cliffs, Tomellin Cafion, Oaxaca, altitude 3,000 
feet, 22 December, 1894 (No. 6117). A plant nearly. allied to 
Alomia, but differing in the form and arrangement of its leaves, 
larger heads, and flattened achenes. From T?richocoronis it 
differs among other characters in its chaffy receptacle. 
Stevia ELATIOR HBK. var.? pEcUMBENS. Stem strongly 
decumbent, leafy below, the erect portion nearly naked, 1 to 2 
feet high: pubescence of the involucre very fine and appressed, 
not at all glandular: flowers 63 to 7 lines long, purple; aristz of 
the pappus long, commonly crooked or bayonet-shaped.—OCollected. 
by C.G. Pringle, on dry hills near Oaxaca, altitude 6,000 feet, 13 
October, 1894 (No. 4974). Perhaps distinct from but very nearly 
related to this species. 
EvpaToriuM PrINGLEI. Fruticose, 8 to 12 feet high: branches 
terete, light-brown, glabrous: leaves all opposite, petiolate, del- 
toid-ovate, acutish to sub-acuminate, crenate-serrate, truncate at 
base, puberulent and slightly scabrous above, paler and soon 
becoming quite smooth beneath, 15 to 18 lines long, 12 to 14 lines 
broad: petioles 4 to 6 lines long: branches of the inflorescence 
opposite, axillary, thyrsoid and together forming a panicle a foot 
or more in length: pedicels glandular-puberulent: bractlets 
setose: heads 5 lines long, about 33-flowered : involucral scales 
lanceolate-oblong, acute, dark-purple, ciliated, glandular-tomentu- 
lose and not striate, loosely imbricated, sub-biseriate and not 
very unequal, about 3 lines long: corollas white or roseate as 
well as the pappus also.—Collected by C. G. Pringle, on Sierra de 
San Felipe, Oaxaca, altitude 9,500 feet, 24 December, 1894 (No. 
6118). Resembling & Rafaelense Coulter, but differing in its 
deltoid leaves, truncate at base, and in its thicker densely 
glandular-pubescent and non-striated involucral bracts. 
EvpPATORIUM cCOLLopES. Fruticose: essentially glabrous and 
- more or less glutinous, 2 to’3 feet high: branches striate-angu- 
late: leaves opposite, ovate, closely sessile, acuminate, rounded 
at base, sharply and finely serrate or serrulate, often purplish- 
tinged, paler beneath, 3-nerved, commonly somewhat vernicose, 
12 to 16 lines long, a little more than half as broad, of rather firm 
texture: corymbs many-headed ; pedicels rather short: bractlets 
small with revolute tips: heads 20—25-flowered, purplish: scales. 
of the involucres in 2 to 3 series, linear, attenuate, ciliate, purple- 
tipped: flowers considerably exserted, in dried state white or 
roseate: young achenes minutely ciliate on the angles.—Collected 
by C. G. Pringle, on hills, Las Sedas, Oaxaca, altitude 6,000 feet, 
1 October, 1894 (No. 4941). 
BRICKELLIA NUTANS. Tall, 5 to 8 feet high: stems terete, 
striate, purple, pubescent: leaves chiefly opposite (only the 
uppermost alternate), broadly ovate, acuminate, cordate, serrate, 
