Order 70.— COMPOSITE. 423 



17 A. ameth^stinus Nutt. ? Clothed with a miauto hoary tomentum ; st. 

 racemoua-paniculate ; Iva. linear-lanceolate, entire, rough, acute, with somewhat 

 auriculate appendages at the clasping base; invol. broad-bell-shaped; scaU.^ 

 hispid-puiesceni, imbricated, erect, with acute squarroiis, green tips ; ach. silky. — 

 Found at Northbridge, Ms. (by Dr. Robbins, and by us). Hds. with showy blue 

 raya, expending 1'. Differs from Nuttall's descr. in its scales which are not of 

 equal length. Sept 



18 A. puniceus L. St. hispid, paniculate; Ivs. amplexieaul and more or Icsn 

 auriculate at base, appresscd serrate, rougliish above ; invol. loose, longer than the 

 disk, the scales UneaT-kmceolaie, long and revoluie, nearly equal and 2-rowed. — A 

 large, handsome aster, common in swamps and ditches, sometimes in dry soilc, 

 K. States apd Can. St. 4 to 6f liigh, generally red (at least on the So\ith side), 

 furrowed, hispid. Lower Its. with remote serratures, rough-edged and rough on 

 the upper surfitco, all acuminate and narrowed at base. Fls. large and showy. 

 Hays 50 to 80, long and narrow, pale-purple. Aug. — Oct. 



ji. TiuiNEDS. Tall and nearly glabrous, slender ; branches divaricate-ascend- 

 ing, mostly 1-flowored; Ivs. linear-lanceolate, sparingly apprcssed-serralc, 

 taper-pointed, auricolate-amplexicaul ; hds. very large ; scales leafy. — In damp 

 woods. Rays spreading 18 to 20". 



19 A. prenantholdes Muhl. St. hairy or pubescent above, coiymbous-panicvi- 

 late ; Ivs. oval-lanceolate, serrate, acuminate, attmtmte at base into a long winged 

 petiole wJdch is auriculate at the insertion ; invol. imbricated with several rows of 

 linear, green-tipped, spreading scales. — Grows in low woods, N. Y. to Ky. Stem 

 2' — 3f high, with a terminal, corymbous panicle of largo heads on short peTiun- 

 cles. Rays showy, pale blue. Leaves with tlio petiolo 5 to 10' long. Brancli 

 leaves smaller, nearly entire. Sept. — Nov. 



20 A. laevis L. Very smooth; st. angular; branches simple, 1-flowered; Ivs. 

 half-clasping, oblong, entire, shining, radical subserrate, lanceolate, upper auri- 

 clod at base; invol. closely imbricate, the scales broadly linear, rigid, thickened 

 and herbaceous at the apex ; ach. glabrous. — A very smooth and beautiful species, 

 2 to 3f high, gi-owing in low grounds. St. polished, green, often somewhat 

 glaucous; Ivs. rather fleshy, tho lowest tapering to a winged petiole. Fls. large 

 and showy, with numerous rays of a fine bine becoming purple. Sept. — Nov. 

 (A. rautabilis L. A. amplexicaulis Muhl.) 



^. L-BVIGATUS. Lvs. long, linoar-lanceolate. (A. Isevigatus WLlld.) 

 y. CY.4.NEUS. St. and lvs. conspicuously glaucous. (A cyaneus Ph.) Beau 

 til'iil varieties, especially the latter. 



21 A conoinuus "WiUd. not of Nees. St. smnple, paniculate or racemous, pubes- 

 cent; lvs. lanceolate and lance-linoar, naiTOwed and clasping at the base, remotelo 

 serrate, upper ones entire. Invol. closely imbricate, scales green at the tip. — 

 Woods, N. States. A slender species 1 to 2f high. Branches of the panicle 

 rather short and remote. Lvs. 3 to 5' long, acuminate, varying from J to 1', in 

 width, smooth except tho midvein beneath, branch lvs. few and much smaller. 

 Hds. middle size, with 10 to 15 bluish-purplo raya Sept. — Nov. 



22 A. serioeus Vent. Sts. slender, clustered, glabrous below, silky, pubescent, 

 branched above ; lvs. clothed on botli sides with a dense, appressed, silky-cancs- 

 cent tomentum, lance-oblong, entire, acute and muoronate, sessile; hds. large, 

 mostly solitwy, terminal on the short, leafy hranchkts; scales lanceolate, silky- 

 canescent like the lvs., spreading at tip; ach. smooth. — A singularly elegant 

 Aster, with shining, silvery foliage, prairies and river banks, WLso. and Iowa to 

 Miss. St. 1 to 2f high. Lower lv3. 2 to :i' by 9 to IG", tlie upper much smaller. 

 Rays- deep violet-blue. Pappus fulvous. Aug. — Oct. f (A. argenteus Mx.) 



23 A. concolor L. St. subsimple, erect, pubescent; lvs lance-oblong, entire, 

 mucronate, grayish, with a minute, silky pubescence both sides, upper ones cue 

 pidate-acuminate ; rac. terminal, virgate, simple or somewhat compound, elon- 

 gated ; scales lanceolate, silky, acute, appressed ; ach. villous. — Pine barrens, N. 

 J. to Fla. A slender and virgate plant, 1 to 3f high, sometimes branched below. 

 Rt. often tuberous. Lvs. IJ' by V, reduced in size upwards. Hds. in a long 

 rac, with purple rays ajid a rust-colored pappus. Aug. — Nov.— Eeaemblw a 

 Liatris. 



