Aster. COMPOSITE. 197 



Var. piibens. Lower face of the oblong-lauceolate leaves tomeutulose-pubesceut, also 

 usually the Howeriug brauehlets. — iSaskatchewan to Upper Michigan. 



Var. latifolius. ytems 2 to 5 feet high : leaves from ovate-lauceolate to ovate, com- 

 paratively short, less uarrowed or sometimes eveu rounded at base. — ^1. humilis, Willd. Spec, 

 iii. 2038, as to char, and indigenous specimen in herb., from Muhl., not Hort. Berol. t. 67. 

 A. amjjgdalinus, Bertol. Misc. vi. t. 5, f. 1. Dallingeria amt/r/dd/imi, Nees, Ast. 179, chiefly, 

 excl. syn. D. cornifolia, Liudl. iu Hook. Comp. Bot. Mag. i. 98. Diplopappus amygdalinus, 

 Torr. & Gray, 1. c. — Low pine barrens, &c., Penn. and New Jersey to Florida and Texas. 

 Extreme forms seem very different from A. umhcllatus, having leaves even 2 inches wide 

 by 3 in length. In specimen from Georgia, ./. Donnell Sinitli, style-appendages (abnormally ? ) 

 rounded-obtuse. 



A. inf irmus, Michx. Stem slender, often flexuous, a foot to a yard high, less leafy, simple 

 or with diverging flowering branches, bearing several or few (or even solitary) pedunculate 

 heads: leaves obovate to ovate or oblong (rarely lanceolate, lower small and scattered), 

 with attenuate base aud hispidulous-ciliolate margin and midrib, more copious primary and 

 some loosely reticulated secondary veins : involucre more imbricated, of thicker and broader 

 obtuse bracts : style-appendages linear-subulate : pappus more rigid ; bristles of the longer 

 pappus nearly all clavellate, rather scanty. — Fl. ii. 109. A. divaricutus, L. Spec, as to syn. 

 Gronov. & Pluk. Aim. t. 79, uot of herb., nor char. A. cornifuUus, Muhl. iu Willd. Spec, 

 iii. 2039. A. humilis, Willd. Hort. Berol. t. 67 (not herb, nor Spec. 1. c.) ; Pursh, Fl. ii. 548 ; 

 Ell. Sk. ii. 366. Chri/sopsis humilis, Nutt. Gen. ii. 153, at least partly. Dallingeria cornifolia, 

 Nees, Ast. 181. Diplostephium cornifolinm, DC. 1. c. Diplopappus coniifolius, Torr. & Gray, 

 Fl. ii. 182. — Open woodlands, Massachusetts aud Penn. to Upper Georgia, Tennessee, and 

 Louisiana ? 



* * Leaves obtuse, occasionally toothiid, both veins a' d veinlets conspiciiouslv reticulated be- 

 neath: akenes oblong, pubescent: papi)us softer and liner, inner bristles not clavellate: disk- 

 corollas with short lobes. 



A. reticulatus, Pursh. Cauescently puberulent : stems strict, 1 to 3 feet high, simple or 

 fastigiately branched at summit, bearing few or numerous slender-pedunculate heads : leaves 

 oval or oblong, or lowest obovate (larger 3 inches loug and 2 wide) : involucral bracts lance- 

 olate : rays 10 to 13, rather long and narrow. — Fl. ii. 548. Chrgsopsis obovuta, Nutt. Gen. 

 ii. 152. Aster obuvatus & A. dichotomus (the latter a slender aud paniculately branching 

 state), Ell. Sk. ii. 368, 366. Diplostephium horeale, Spreng. Syst. iii. 544. D. ohovatum & 

 D. dichotomum, DC. 1. c. Dallingeria ohovata, Nees, Ast. 182. Diplopappus ohovatus, Torr. 

 & Gray, Fl. ii. 184. — Low pine barrens, S. Carolina to Florida. 



§ 9. IXnthe. Pappus less distinctly douhle ; outer setulose (in one species 

 obscure), inner not clavellate : otherwise as in § Orthomeris : involucre about 

 equalling the disk, of narrow and appressed well-imbricated bracts: rays 10 to 

 18, violet: akenes narrow, villous : low and tufted plants, with rigid stems, which 

 are thickly beset with the small linear or lanceolate entire and rigid one-nerved 

 and veinless leaves. — Gray, Proc. Am, Acad. xvi. 98. Diplostephium § Amel- 

 loidea, Nees, Ast. 199. Diplopappus § Amelloidei, DC. Frodr. v. 277, partly. 

 Diplopappus § lanthe, Torr. & Gray, Fl. ii. 181. 



* Head rather large (half-inch high) and broad: style-appendages elongated, subulate-linear or 

 narrower: akenes flat, with strong marginal nerves and sometimes a single lateral nerve. 

 A. linariifolius, L. Stems 6 to 20 inches high, puberulent, strict, very leafy up to the 

 heads : leaves widely spreading (except the small ones on the I)ranchlets), narrowly linear, 

 mucronate, about an inch long, green, smooth except the hispidulous-ciliolate or scabrous 

 acute nuirgins ; uppermost more or less passing into the rigid acutish bracts of the pluriserial 

 campanulate or somewhat turbinate involucre : rays deep violet. — A. lino.rii/ulius & A. ngi- 

 dus, L. Spec. ii. 874; Bart. Fl. Am. Sept. iii. t. 104; Bertol. Misc. Bot. v. t. 6. A. pulcher- 

 rimus, Lodd. Bot. Cab. i. t. 6. Chrgsopsis Unariifolia, Nutt. Gen. ii. 152. Diplostephium 

 linariifolium, Nees, Ast. 199. Diplopappus linariifolius (Hook. FL, Torr. & Gray, Fl.) & 

 D. rigidus, Liudl. iu DC. Prodr. v. 277. — Dry saudy or gravelly soil, Newfoundland to Wis- 

 cousiu and Texas. A variety with white rays is occasionally seen. 



