GREENMAN. — SPERMATOPHYTES FROM MEXICO, ETC, 255 
Achaetogeron purpurascens, Greenm. Proc. Am. Acad. xxxix. 
94 (1903). By typographical error the generic name was here published 
as “‘ Archaetogeron,.” It may be noted here, that specimens of this species 
were also secured from its original station, near Colonia Garcia in the 
Sierra Madre, State of Chihuahua, by #. W. Nelson, 1 to 20 August, 
1899, no. 6213 (hb. Gr., and hb. U. S. Nat. Mus.). 
Achaetogeron versicolor, n. sp. An herbaceous annual or some- 
times indurated at the base and thus becoming perennial, 1.5 to 3 dm. 
high: stems much-branched from the base, erect or ascending, pubescent 
with spreading hirsute hairs: leaves alternate, sessile, linear-lanceolate to 
oblanceolate-spatulate, 8 to 18 mm. long, 1 to 6 mm. broad, acute, entire 
to 3—5-toothed, hirsute-pubescent: peduncles slender, 6 cm. or less in 
length, upwardly enlarged just beneath the head, pubescent with hori- 
zontally spreading hairs: heads including the fully expanded rays about 
12 mm. in diameter: involucre campanulate, about 4 mm. high; bracts 
of the involucre biseriate, lanceolate to lance-ovate, acute, scarious-tipped 
and with thin margins, hirsute-pubescent, purplish: ray-flowers in about 
3 rows, numerous, fertile ; rays 4 to 5 mm. long, half a millimetre wide, 
white or whitish at the base, tipped with color varying from magenta to 
dark purple: disk-flowers many: pappus of both ray- and disk-flowers a 
minute inconspicuously fringed crown: mature acheves laterally com- 
pressed, about 1 mm. long, sparingly pubescent to essentially glabrous. — 
Mexico. State of Hidalgo: meadows near Buena Vista Station, altitude 
2530 m., 7 August, 1904, C. G. Pringle, no. 8849 (hb. Gr.). 
igeron alcicornutus, n. sp. Annual: stem erect, simple and 
purplish below, branched and green above, striate, pubescent with long 
spreading or slightly reflexed jointed hairs: leaves sessile, semiamplexi- 
caul, auriculate, oblong-lanceolate, 2 to 6.5 em. long, 0.5 to 3 em. broad, 
deeply laciniate-toothed in the terminal half with diverging teeth or divi- 
sions, hirsute on both surfaces: heads subcorymbosely disposed on naked 
or bracteate peduncles, including the rays 2.5 to 3 cm. ia diameter: in- 
volucre.campanulate ; bracts of the involucre narrowly lance-attenuate, 
in 2 (3) series, hirsute-villous with some glandular hairs intermixed : 
rays white, many (180-200) nearly 1 cm. long, less than 1 mm. wide : 
disk-flowers many: pappus of both ray- and disk-flowers in a single series 
consisting of few slender setae, 1 to 2 mm. in length, very caducous : 
mature achenes about 1 mm. long, glabrous. —Mexico. State of 
Chihuahua: on alluviums of Arroyo Auco, Sierra Madre, 15 October, 
1887, C. G. Pringle, no. 1273 (hb. Gr.). i 
Mr. Pringle’s plant was originally referred to Achaetogeron Seemannii, 
