424 Order 10.— COMPOSURE. 



24 A. turbin^llus Lindl. Smooth or slightly soabrous; branches and branehlets 

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

 invol. clavate-turbinate, acute at base, as long as the disk fig. (6") ; scales im- 

 bricated in many rows, linear, obtuse, with short green tips. — ^Woodg and river 

 bottom's. 111. (Mea'd.), Mo., etc., to La. Sts. 2f high, somewhat corymhous. 

 Lowerlvs. 3 to 5' by f to 1-J', the others gradually reduced upwards to the scales. 

 Hds. middle size, with blue rays and brownish pappus. Sept. 



25 A. dunidsus L. Smooth or puberulent; branches raoemous-panicled, tvs. 

 numerous, Smooth, linear, sessile, entire or the lowest subserrate, those of the 

 branches very short ; invol. ohiuse at iase, closely imbricate ; scales ohtu'sp. — 

 About 2f high, in dry shades and borders of woods, TJ; 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-whito rays. Quite variable in respect to the 

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

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



13. oORiDiFOLins is a starved, attenuate forni, very slender every way. 



26 A. carneua 1. Smooth ; St. dividing into many straight, paniculate, leafy 

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

 ing to a sessile base, the upper amplexioaul; scales railier acute, close, much 

 shorter thorn the dish — A handsome bushy Aster, by fences, etc. (Claremont), N. 

 H., W. to Ind. Rare. St. about 2f long, often purple. St. Its. 3 to 5' by 4 td 

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

 each with 20 to 80 pale purple, narrow rays. Sept., Oct. 



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

 pahiculate ; Ivs. linear or lance-linear,"very smooth, those of the branches subulate 

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

 long as the dislc ; invol. loose, scales mucronate, with subulate green tips as long as 

 the disk. — G-rows in rocky fields, in most of the States. St. 1 to 3f hi^h, with 

 numerous brittle 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. spicate-raoemed 

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

 disls, somewhat spreading, rays very short. — S. Car. to Fla. on the islands and 

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

 Sept., Oct. 



29 A. simple^ 'Willd. Glabrous; st. corymbous-paniculaie above; lvs. lanceoldk, 

 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 corymhous. Lvs. 2 to 4^ by 5 to 10", very smooth 

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

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

 short branclilets. Sept. 



/3. Altioe. Branches hirsute or pubescent ; hds. above the middle size, with 



blue rays. — St. 4 to 6f high. 

 y. HuiiiLioE. Branches pubescent, with short, crowded spilces of small heads ; 



rays pale blue. — St. 1 to 2f high. 

 (!. EEcnavATus. Diffuse, with long, spreading or recurved branches; hds. 



loosely raoemed ; rays bluish white. — ^Western. 



30 A. tenuifolius L. St. smooth, erect, paniculate-branching, with 1-flowered 

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

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

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

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

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

 purple rays.' Sept. 



31 A. Tradesc^nti L. Smooth or smoothish; Iwanches virgate, paniculate; 

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

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



