424 ORDER 70. COMPOSITES. 



24 A. turbinellus Lindl. Smooth or slightly scabrous; branches and branchletg 

 very slender ; Ivs. lanceolate, tapering to each end, acute, slightly clasping, entire ; 

 invol. clavate-turbinate, acute at base, as long as J;he disk fls. (6") ; scales im- 

 bricated in many rows, linear, obtuse, with short green tips. Woods and river 

 bottoms, 111. (Mead.), Mo., etc., to La. Sts. 2f high, somewhat corymbous. 

 Lower Ivs. 3 to 5' by | to 14-', the others gradually reduced upwards to the scales. 

 Hds. middla size, with blue rays and brownish pappus. Sept. * 



25 A. dumosus L. Smooth or puberulent; branches racemous-panicled, fax 

 numerous, smooth, linear, sessile, entire or the lowest subserrate, those of Iho 

 branches very short; invol. obtuse at base, closely imbricate; scales obtuso. 

 About 2f high, in dry shades and borders of woods, U. S. St. much branched, 

 very leafy, the lower Ivs. 2 to 3' long, the upper smaller and becoming very minute. 

 Hds. small, with about 24 purplish- white rays. Quite variable in respect to tho 

 extent of its branching inflorescence, the acuteness and size of its Ivs., the obtuse- 

 ness of its scales, etc. Rt. Ivs. 1 to 3' long, st. and branch Ivs. 2 to 12''long. Sept. 



(3. CORIDIFOLIUS is a starved, attenuate form, veiy slender every way. 



26 A. carneua L. Smooth ; st. dividing into many straight, paniculate, leafy 

 branches; Ivs. uniform, linear-lanceolate, acuminate, entire, tho lower ones taper- 

 ing to a sessilo base, the upper amplexicaul ; scales rather acute, close, much 

 shorter than the disk. A handsome bushy Aster, by fences, etc. (Claremont), N. 

 H., W. to Ind. Bare. St. about 2f long, often purple. St. Ivs. 3 to 5' by 4 to 

 6", branch Ivs. much smaller. Hds. numerous, middle size, somewhat sccund, 

 each with 20 to 30 pale purple, narrow rays. Sept., Oct. 



27 A. ericoides L. Nearly or quite smooth ; branches virgate, spreading, secund, 

 paniculate; Ivs. linear or lance-linear, very smooth, those of tho branches subulate 

 and approximate, short, of the stem long, of the root oblong-spatulate ; rays as 

 long as tho disk ; invol. loose, scales mucronate, with subulate green tips as long as 

 the disk. Grows in rocky fields, in most of the States. St. 1 to 3f high, with 

 numerous brittlo branches and branchlets forming a pyramid, and terminated 

 each by a single pale-purple flower. Lvs. rather numerous 3" to 1' iu length. 

 Hds. small, white, about 20-rayed. Sept. 



28 A. racemosus Ell. Rough-pubescent, with many erect branches; Ivs. linear 

 and linear-subulate, very acute, margins very scabrous; hds. spicate-racemed 

 and crowded on the upper part of the branches ; scales very acute, as long as the 

 disk, somewhat spreading, rays very short. S. Car. to lla. on tho islands and 

 coast. St. 2 to 3f high. 'The very small heads (2" long) aro almost rayless. 

 Sept., Oct. 



29 A. simplex "Willd. Glabrous; st. corymbous-paniculate above ; Ivs. lanceolate, 

 acuminate, entire, the margins scabrous, lower ones serrate; scales loosely imbri- 

 cated, linear- subulate. Another variable species in low grounds, U. S. and Can. 

 St. 1 to 5f high, somewhat corymbous. Lvs. 2 to 4 s by 5 to 10", very smooth 

 both sides, tapering to a slender point; those of the branches and branchlets 

 proportionately smaller. Hds. rather few, middle sizo (4 to 5" long), on tho 

 short branchlets. Sept. 



j3. ALTIOR. Branches hirsute or pubescent ; hds. above the middle size, with 



blue rays. St. 4 to 6f high, 

 y. HUMILIOR. Branches pubescent, with short, crowded spikes of small hoads ; 



rays pale blue. St. 1 to 2f high. 

 J. RECURVATUS. Diffuse, with long, spreading or recurved branches; hds. 



loosely racemed ; rays bluish white. AVestern. 



30 A. tenuifolius L. St. smooth, erect, paniculate-branching, with l-flowered 

 branchlsts; Ivs. linear and linear-lanceolate, tapering at each end, long -acuminate, 

 entire, with roughish margins, the lower ones often serrate in the middle ; invol. 

 scales very slender, erect, acute, slightly longer than the disk. Grows in moist 

 fields, Can. to Ya. St. Ivs. 2 to 4' long, those of the branches and branchless 

 proportionately smaller. Hds. 3 to 4" long, with numerous (20 to 30) long, palo 

 purple rays. Sept. 



31 A. Tradescanti L. Smooth or smoothish ; branches virgate, paniculate; 

 Ivs. lance-linear, the lower remotely serrate, sessile ; invol. closely imbricats ; 

 scales linear-filiform, scarcely equaling the disk. A fine species, with numerous 



