In dry open places in the Rockies at the lower altitudes, a pretty tufted plant resembling an Aster; flowering during July. [Sidenote: =Erigeron multifidus= Rydb. _Daisy Fleabane._] Rough-hairy or somewhat smooth, stems slender, numerous, 3—6 inches high. Leaves crowded on the crowns of the caudex, usually twice ternately parted into linear or spatulate hairy lobes; an inch long or less including the petiole; stem-leaves narrow or scale-like. Flowers solitary at the top of the nearly leafless hairy stem; involucre ¼ of an inch high and nearly ½ an inch in diameter, outer bracts shorter and spreading; rays 40—60, white, purple or violet, from ⅛ to nearly ½ an inch long. On dry rocks throughout the Rockies up to 6000 feet elevation or above, flowering during June or July. _Erigeron multifidus discoideus (A. Gray.) Rydb._, differing from the species in the entire absence of ray flowers and smaller heads, and _Erigeron multifidus nudus Rydb._, differing from the species in being almost entirely smooth except a few hairs on the petioles and involucral bracts, are found in similar localities throughout the Rockies, often growing with the species and frequently much more abundant. [Illustration: Erigeron discoideus Rydb. Erigeron multifidus Rydb. (½ Nat.) Cut-Leaved Fleabane.] [Illustration: Erigeron melanocephalus A. Nelson. (¾ Nat.) Black-Headed Fleabane.] [Sidenote: =Erigeron aureus= Greene _Golden Fleabane._] Ashy-hairy, 3—6 inches high from a tufted caudex. Leaves ovate, spatulate or roundish, an inch or more long, contracted into a petiole; stem leaves ¼ of an inch long, few, and very narrow. Flowers solitary, about ⅓ of an inch high and broad; involucre usually reddish or purplish, covered with woolly hairs; bracts nearly equal, lanceolate, rather loose; rays numerous, ¼—⅓ of an inch long, deep golden yellow. In open ground on alpine meadows and among rocks, at the higher altitudes, throughout the region; a striking little plant, flowering in July. [Sidenote: =Erigeron melanocephalus= A. Nelson. _Black-woolly Fleabane._] Stems few or several, slender, erect, 2—6 inches high, with purplish-black hairs. Leaves numerous, elliptic or narrowly oblong, ¾—1½ inches long, nearly smooth; stem leaves broadly linear, acuminate, ¾—1 inch long, hairiness similar to that of the stem. Head solitary, ⅓ of an inch broad; involucral scales nearly equal, with attenuate tips, densely covered with purplish-black wool; rays 50—60, white or pinkish, ⅛ of an inch long. In open stony or more or less grassy ground at the high altitudes; flowering during July. [Sidenote: =Erigeron acris= L. _Blue Fleabane._]