Aster. COMPOSITE. 151 



base ; the margin entire or remotely denticulate, somewhat shining, obtuse, 

 with a mucronate point ; the others lanceolate, acute, serrulate with minute 

 appressed callous teeth. Heads large: rays blue. Achenia puberulent. 

 iVee5._According to Nees, this is the A. Novi-Belgii of many gardens: it 

 has been, perhaps, derived from that species. 



93. A. luxurians (Nees) : stem paniculate ; the branches corymbose-race- 

 mose at the summit ; branchlets bearing single heads ; leaves oval-oblong or 

 lanceolate, acuminate, narrowed at the base, clasping, sharply serrate in the 

 middle, scabrous and glaucescent above ; scales of the involucre loosely im- 

 bricated, linear-lanceolate, acute. Nees, Ast. p. 83 ; DC. prodr. 5. p. 238. 

 A. prenanthoides, Nees, synops. p. 23 ; Link, enum. 2. p. 330. 



13. stem more compound, and more hairy in lines. Nees, I. c. — A. luxuri- 

 ans, Spreng. syst. 3. p. 538 (excl. syn.), ex Nees. 



North America? Sprengel. (Nees, probably supposing this to be the 

 A. Novi-Belgii of Pursh as well as of Nuttall, has copied from the former- 

 the habitat: "In hedges and old fields. New England to Virginia; Aug.- 

 Oct.", although the synonym of Pursh is not adduced. He states also that 

 he has seen native specimens from Virginia.) — Root creeping, stoloniferous. 

 Stem 2 feet or more in height, glabrous or more or less hirsute with decurrent 

 lines, whh spreading branches at the summit ; the branches corymbose-divi- 

 ded ; the branchlets spreading, leafy, bearing single heads. Leaves approx- 

 imate, 2i to 3 inches long, ari inch wide, sharply but not coarsely serrate in 

 the middle, sessile and somewhat clasping by the narrowed base, smooth 

 and paler beneath, densely but obsoletely reticulated with slender veins; 

 those of the branches and branchlets similar to the cauline ones, but dimin- 

 ished in size, less tapering at the base, and entire. Heads, including the 

 lilac (at length deep violet) rays, an inch in diameter. Involucre shorter 

 than the disk ; the scales in several series, erect-imbricate, thickish, unequal, 

 linear-lanceolate, rather broad, acute, the base and ciliate margin thin and 

 whitish, with a spatuliform herbaceous disk. Achenia glabrous. Nees. — 

 This appears, as well from the description as from our imperfect (cultivated) 

 specimens, to be perhaps too closely allied to our A. pr«altus. 



94. A. adulterinus (Willd.) : stem paniculate-decompound from the base; 

 the branches corymbose-racemed ; leaves oblong-lanceolate, mucronate, 

 clasping, smooth, the margin scabrous; scales of the obovate involucre some- 

 what equal, spatulate-lanceolate, squarrose, enlarged after flowering. Nees. — 

 Willd. enum. 2. p. 884 ; Nees, Ast. p. 85 ; DC. prodr. 5. p. 238. 



North America. Sept. — Stem 1^ to 2 feet high, hairy in decurrent lines. 

 Leaves lanceolate, clasping, somewhat shining, the lower slightly serrate, 

 with scabrous margins ; those of the branchlets nearly linear, squarrose- 

 spreading. Scales of the involucre linear-cuneate, squarrose-spreading. 

 Rays pale violet ; the disk yellow, turning brownish. Willd. — Heads mid- 

 dle-sized, at first white, then pale violet. Achenia glabrous. Perhaps a 

 variety of A. Novi-Belgii. Nees. — The A. adulterinus. Hook. fl. Bor.-Am. 

 from the coast of Oregon {Dr. Scouler .') is probably a different species ; but 

 the specimens are insufficient for satisfactory determination. Our specimen 

 of A. adulterinus from the Berlin garden differs very little from the A. tardi- 

 florus from the same and other gardens. 



95. A. tardiflorus (Linn.? Nees): stem glabrous, divaricate-corj-mbose ; 

 leaves oblons-lanceolate, obliquely clasping, serrate towards the apex, the 

 margins scabrous ; those of the branchlets obtuse ; scales of the involucre 

 imbricated, squarrose-spreading, thick; the exterior often elongated and some- 

 what radiant. Nees.— Linn. spec. {ed. 2) 2. p. 1231, ex descr. (but according 

 to Lindley, the plant of the Linnaean herbarium is A. patulus. Lam.) ; Ait. 

 Kew. {ed. 1) 3. p. 209 ? Willd. spec. 3. p. 2049 ; Nees, Ast. p. 78 ; DC. ! 

 prodr. 5. p. 238. A. tardiflorus /?. caespitosus, Lindl. ! in DC. I. c. A. 



