Aster. COMPOSITE. 107 



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

 usually the flowering brauchlets. Saskatchewan to Upper Michigan. 



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

 paratively short, less narrowed or sometimes even rounded at base. .4. humi/tH, Wilhl. Spec. 

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

 A. amygdalinus, Bertol. Misc. vi. t. 5, f. 1. Dlli,i<j< ,-in. amygdalina, Xees, Ast. 179, chiH'v, 

 excl. syn. D. cornifolin, Liudl. in Hook. Coinp. Bot. Mag. i. 98. I.i/j>/o/ifij>/nis nim/i/iln/iir/s, 

 Torr. & Gray, 1. c. Low pine barrens, 6bc., Penn. and New Jersey to Florida and Texas. 

 Extreme forms seem very different from A. umbel I at, us, having leaves even 2 inches wide 

 by 3 in length. Iii 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. cliriu-:<-ntns, L. Spec., as to syn. 

 Gronov. & Pluk. Aim. t. 79, not of herb., nor char. A. cornifolius, Mulil. in Willd. Spec, 

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

 Ell. Sk. ii. 366. Chrysopsis humilis, Nutt. Gen. ii. 153, at least partly. Dodlingeria con/ij'oliti, 

 Nees, Ast. 181. Diplostephium cornij'aHiuii, DC. 1. c. Diplopappus corn/folius, Torr. & Gray, 

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

 Louisiana ( 



* * Leaves obtuse, occasionally toothed, both veins a' d veinlets conspicuously reticulated be- 

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

 corollas with short lobes. 



A. reticulatus, Prnsii. Canescently pubernleut : 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 Avide) : involucral bracts lance- 

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

 ii. 152. Aster obocatns & A. dicltotmnus (the latter a slender and pauiculately branching 

 state), Ell. Sk. ii. 368, 366. Diplnsh pliiuni boreale, Spreug. Syst. iii. 544. D. obovatinit & 

 D. dichotomum, DC. 1. c. Dodlingeria ubuvula, 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), inuer 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 AineJ- 

 loidea, Nees, Ast. 199. Diplopappus Amelloidei, DC. Prodr. 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, pubernlent, 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 

 acute margins ; uppermost more or less passing into the rigid acutish bracts of the pluriscrial 

 campannlate or somewhat turbinate involucre: rays deep violet. A. linariifolius & A. ri-ji- 

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

 rimus, Lodd. Bot. Cab. i. t. 6. Chrysopsis Inuirnfoint, Nutt. Gen. ii. 152. Diplostepliium 

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

 D. r.tgidus, 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. 



