424 Oiideb 10.— COMPOSITE. 



24 A. tnrbinellus Lindl. Smooth or slightly scabrous; branches and branchlets 

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

 invol. elavato-turbinate, acute at base, as long as the disk fls. (G ') ; 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 lvs. 3 to 5' by J to 11', the others gradually reduced upwards to tho scales. 

 HJs. middfo size, with blue rays and brownish pappus. Sept. 



25 A. dumosus L. Smooth or puberulent; branches raccmous-panicled, lvs. 

 BOmerpus, smooth, linear, sessile, entire or tho lowest subscrrate, those of tho 

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

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

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

 Hds. small, with about 24 purplish-whito rays. Quito variable- in respect to tli9 

 extent of its branching inflorescence, tho acutcnessand size of its lvs., tho obtuse- 

 ne33of its scales, etc. Rt. lvs. 1 to 3' long, st. and branch lvs. 2 to 12' long. Sept. 



[3. coriimfolius is a starved, attenuate form, very slender every way. 



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

 branches; lvs. uniform, linear-lanceolate, acuminate, entire, the lower onvs taper- 

 ing to a sessib base, tho upper amplexicaul; scales rather acute, chse, much 

 shorter than the disk. — A handsomo bushy Aster, by fences, etc. (Glarcmont), N. 

 H., W. to Ind. Rare. St. about 2f long, often purple. St. lvs. 3 to b r by 4 to 

 6", branch lvs. much smaller. Hds. numerous, middle size, somewhat secund, 

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



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

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

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

 long a-; the disk ; invol. loose, scabs 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 

 num3rous brittb branches and branchlets forming a pyramid, and terminated 

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

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



28 A. racemdsus Ell. Rough-pubescent, with many erect branches; lvs. linear 

 and linear-subulate, very acute, margins very scabrous; hds. spicatc-raeemed 

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

 disk, soaiewhat spreading, rays very short. — S. Car. to Fla. on tho islands and 

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

 Sept., Oct. 



29 A. simplex Willd. Glabrous; st. corymbous-paniculatc above; lvs. lanceolate, 

 acuminate, entire, tho 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 V by 5 to 10", very smooth 

 both sides, tapering to a slender point; thoso of tho branches and branchlets 

 proportionately smaller. Hds. rather few, middlo size (1 t} 5" long), on tho 

 ahort branchlets. Sept. 



/?. Altiok. Branches hirsute or pubescent ; hds. above the middlo size, with 



blue rays. — St. 4 to 6f high. 

 y. humilior. Branches pubescent, with short, crowded spikes of small heads ; 



rays pale blue. — St. 1 to 2f high. 

 6. RECURVATU3. Diffuse, with long, spreading or recurved branches; hds. 



loosely racemed ; rays bluish white. — Western. 



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

 branchkts ; lvs. linear and linear-lanceolate, tapering at each end, long-acuminate, 

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

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

 fields, Can. to Va. St. lvs. 2 to 4' long, those of tho branches and branchlets 

 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, paniculato; 

 lvs. lance-linear, the lower remotely serrate, sessile ; invol. closely imbricate ; 

 scales linear-filiform, scarcely equaling tho disk. — A fino species, with numerous 



