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 E. W. Nelson, 1 to 20 August, 

 1899, no. 6213 (lib. 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 ram. in diameter: involucre campanulate, about 4 mm. high; bracts 

 of the involucre biseriate, lanceolate to lunce-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 achenes 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.). 



Erigeron 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 cm. long, 0.5 to 3 cm. 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. in diameter : in- 

 volucre campanulate ; bracts of the involucre narrowly lance-attenuate, 

 in 2 (3) series, hirsute-villous with some glaudular 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.). 



Mr. Pringle's plant was originally referred to Achaetogeron Seemannii, 



