=Chrysanthemum.= Receptacle naked; rays none. =Artemisia.= Anthers with tails at the base; heads without rays. Receptacle not bristly; corolla not deeply cleft. Pappus hair-like in pistillate flowers; club shaped in staminate. =Antennaria.= Pappus of all the flowers similar. =Anaphalis.= Receptacle long bristly; corolla deeply cleft. Leaves and usually the involucral bracts prickly =Carduus.= Leaves and involucral bracts not prickly. =Saussurea.= [Sidenote: =Chrysopsis hispida= (Hook.) Nutt. _Hispid Golden Aster._] Stems numerous from a woody rootstock, rough-hairy throughout, spreading, 6—12 inches long. Leaves spatulate to oblong, entire, spreading, ¾—1½ inches long, obtuse at the apex, narrowed at the base, often into petioles half as long as the blade or more. Heads very numerous, about ½ an inch broad; involucre less than ½ an inch high, its bracts lanceolate, rough-hairy; ray flowers bright yellow, ¼ of an inch or more long. In dry soil through the lower valleys throughout the Rockies; flowering in midsummer. [Sidenote: =Solidago multiradiata= Ait. _Northern Goldenrod._] Stems smooth or somewhat hairy above, slender, 6—15 inches high. Leaves firm, smooth or nearly so, the basal and lower ones spatulate or oblanceolate, entire or sparingly serrate, obtuse, finely reticulate-veined, 3—5 inches long, the upper smaller and narrower, entire. Heads about ⅓ of an inch high, usually few in a rather compact terminal cyme; bracts of the involucre thin, linear-lanceolate, acute, smooth; rays 8—15, large. On open hillsides throughout the region; flowering in July. [Sidenote: =Solidago decumbens= Greene. _Field Goldenrod._] Stems clustered at the summit of a strong, perpendicular root, stout, decumbent, 6—18 inches high, usually dark red and sparsely hairy. Leaves spatulate-obovate to oblanceolate, obtuse or acutish, more or less distinctly serrate toward the summit, upper cauline leaves similar but few and reduced, all rough on the margins. Heads large in a thyrsoid panicle; bracts of the involucre glandular-viscid, linear, obtuse, of firm texture, nerved; rays large. [Sidenote: =Solidago missouriensis= Nutt. _Missouri Goldenrod._] Smooth, rather slender, 3—5 feet high. Leaves firm or thick, those of the stem linear-lanceolate and sessile, acuminate at the apex, narrowed at the base, 2—4 inches long, rough-margined, triple-nerved, entire or sparingly serrate with low sharp teeth, the basal and lowest ones longer, spatulate and petioled. Heads ⅛—¼ of an inch high on one side of the spreading or recurving branches of the short panicle; bracts of the involucre oblong, greenish-tipped, obtuse; rays 6—13, short. In dry soil on the edges of woodland at the lower altitudes throughout the Rockies; flowering in August. [Sidenote: =Solidago canadensis= L. _Canada Goldenrod._]