Aster. COMPOSITE. 197 



Var. pubens. Lower face of the oblong-lanceolate leaves tomentulose-pubescent, also 

 usually the flowering branchlets. — Saskatchewan to Upper Michigan. 



Var. latif olius. Stems 2 to 5 feet high : leaves from ovate-lanceolate to ovate, com- 

 paratively short, less narrowed or sometimes even rounded at base. — A. humilis, Willd. Spec. 

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

 A. amygdalinus, Bertol. Misc. vi. t. 5, f. 1. Dodlingeria amygdalina, Nees, Ast. 179, chiefly, 

 excl. syn. D. cornifolia, Lindl. in 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. umbellatus, having leaves even 2 inches wide 

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

 rounded-obtuse. 

 A. infirmus, 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 and 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, not of herb., nor char. A. cornifolius, Muhl. in Willd. Spec. 

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

 Ell. Sk. ii. 366. Chrysopsis humilis, Nutt. Gen. ii. 153, at least partly. Dodlingeria cornifolia, 

 Nees, Ast. 181. Diplostephium cornifolium, DC. I.e. Diplopappus cornifolius, Torr. & Gray, 

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

 Louisiana t 



# # Leaves obtuse, occasionally toothed, both veins at d veinlets conspicuously reticulated be- 

 neath: akenes oblong, pubescent: pappus softer and finer, inner bristles not clavellate: disk- 

 corollas with short lobes. 



A. reticulatus, Pursh. Canescently 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 long and 2 wide) : involucral bracts lance- 

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

 ii. 152. Aster obovutus & A. dicliotomus (the latter a slender and paniculately branching 

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

 D. dichotomum, DC. 1. c. Dodlingeria obovata, Nees, Ast. 182. Diplopappus obovatus, Torr. 

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



§ 9. IXnthe. Pappus less distinctly double; 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 yeinless leaves. — Gray, Proc. Am. Acad. xvi. 98. Diplostephium § Amel- 

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

 Diplopappus § Ianthe, Torr. & Gray, PI. 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 branchlets), narrowly linear, 

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

 acufe margins ; uppermost more or less passing into the rigid acutish bracts of the pluriserial 

 campanulate or somewhat turbinate involucre: rays deep violet. — A. linariifolius & A. rigi- 

 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. Chrysopsis hnariifolia, Nutt. Gen. ii. 152. Diplostephium 

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

 D. rigidus, Lindl. in DC. Prodr. v. 277. — Dry sandy or gravelly soil, Newfoundland to Wis- 

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



