OHDER 70. COMFOSIT^L 423 



17 A. amethystinus Nutt. ? Clothed with a minute hoary tomentum ; st 

 racemousrpaniculate ; Ivs. linear-lanceolate, entire, rough, acute, with somewhat 

 auriculate appendages at the clasping base ; iuvol. broad-bell-shaped ; scaks 

 hispid-pubescent, imbricated, erect, with acute squarrous, green tips; ach. silky 

 Moiat soils, Ms. (Dr. Robbings etc.) to 111. (Mr. J. Wolf.) Hds. with showy blue 

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

 equal length. Sept. 



18 A. puniceus L. St. hispi 1, paniculate ; Ivs. amplexicaul and more or less 

 auriculate at base, appressed serrate, roughish above ; invol. loose, longer than the 

 disk, the scales linear-lanceolate, long and revolute, nearly equal and 2-rowed. A 

 large, handsome aster, common in swamp.s and ditches, sometimes in dry soils, 

 N. States and Can. St. 4, to Gf high, generally red (at least on the South side), 

 furrowed, hispid. Lvs. rough-edged and rough beneath, acuminate, and some nar- 

 rowed at base. Rays 30 60, long (5'') narrow, pale-purple, showy. Aug. Sept. 



J3. VIMINKUS. Tall, slender, smootliish ; has. few, very large ; Ivs. narrow. 

 y. FIRMUS. Low (2 3f.) scabrous, stout ; Ivs. thick, subentire. Hds. many. 

 6. GLABER. Low (2f.) simple, smootliish; Ivs. narrow, erect, entire; sc. loose 

 but not recurved ; rays large, 2030, pale. Swampy thickets, 111. (J. Wolf.) 

 t. CANDIDUS. Ihe common form (a) with white rays. N. Y. (Mr. Hankenson.) 



19 A. prenanthoides Muhl. St. hairy or pubescent above, corymbous-panicn- 

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



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

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

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

 cles. Rays showy, pale blue. Loaves with the petiole 5 to 10' long. Branch 

 leaves smaller, nearly entire. Sept. Nov. 



20 A. laevia L. Very smooth; st. angular; branches simph, \-flowered; Iva. 

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

 cled 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, growing in low grounds. St. polished, green, often somewhat 

 glaucous; Ivs. rather flashy, the lowest tapering to a winged petiole. Fls. large 

 and showy, with numerous rays of a fino bluo becoming purple. Sept. Nov. 

 (A. mutabilia L. A. amplexicaulis Muhl.) 



/?. L.EVIG.VTU.S. Lvs. long. Iinear-l:mc3olate. (A. Isevigatus Willd.) 

 y. CYAXECS. St. and Ivs. conspicuously glaucous. (A. cyaneus Ph.) Beau- 

 tiful varieties, especially tho latter. 



21 A concfnnus Willd. not of Nees. St. simple, paniculate or racemous, pubes- 

 cent; Ivs. lanceolate and lunce-linear, narrowed and clasping at the base, remotely 

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

 Woods, JS. States. A slendar species 1 to 2f high. Branches of tho panicle 

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

 width, smooth except tho midvein beneath, branch Ivs. fow and much smaller. 

 Hds. middle size, with 10 to 15 bluish-purple rays. Sept. Nov. 



22 A. sericeus Tent. Sts. slender, clustered, glabrous below, silky pubescent, 

 branched above ; Ivs. clothed on both sides with a dense, appressed, silky-canes- 

 cent tomentum, lance-oblong, entire, acute and mucronate, sessik; Itds. large, 

 mostly solitary, terminal on, the short, leafy Iranchkts; scales lanctols.te, silky- 

 canescent like tho Ivs., spreading at tip; ach. smooth. A singularly elegant 

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

 Miss. St. 1 to 2f high. Lower Ivs. 2 to 3' by 9 to 16", the upper much smaller. 

 Rays deep violet-blue. Pappus f ilvous. Aug. Oct. ( (A. argenteus MX.) 



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

 mucronate, grayish, with a- minute, silky pubescence both sid?s, upper ones cus- 

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

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

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

 Rt. often tuberous. Lvs. V,' by ^', reduced in size upwards. HcK in along 

 rac., with purple rays and "a fust-colored pappus. Aug. Nov. Resembles a 

 Liatria. 



