COMI'OSIT.E. (composite FAMILY.) 23J 



■*- ■*- Im-o'urre of many fen/ .shtultr rqiial smlrs npprnriug like n single row. 

 3.^. A. Novae-AngliaB, L. .SVrw k/ok/, /lu//// (3°-8° higli), conmbed at 

 the smnniit ; hunx n rj uiiimrviis, lannolotc, mlire, acute, aiiriatlate-rlas/un;/, clol/ud 

 with minittejmbescence ; scuks oj't/ie inrolucre lineuf-aul-s/tupcd, loose, (jUindulur-viscid, 

 as well as the branchlcts ; rays violct-purplc, in var. kosels rosc-purpic (A. 

 losL'us, Desf), very numerous; aciienin hairy. — Moist grounds: eoninion. — 

 Heads larj;e, corynibcd. Var. > witii white rays, Carroll Co., 111., //. ^/limtr. 

 **#****# ILads, Sj-c, as in tlir prrredinr/ group ; hut foliage as in ♦ » ♦. 



34. A. anomalus, Engelm. Somewhat hoary-pubeseent; stems slender 

 (2° -4° high), simple or racemose-branehcd above; leaves ovate or ovatc-lanec- 

 olatc, pointed, entire or nearly so, the lower cordate and long-petioled, the upper 

 small and almost sessile; scales of the hemispherical involucre imbricated in 

 several rows, appressed, with linear spreading leafy tips ; achcnia smooth. — 

 Limestone cliffs, W. Illinois (and Mis.souri, near St. Louis), Engelinann. — Heads 

 as large as those of No. 31 : rays violet-purple. 



§4. OKITROl'HIUM, Kuntli. Scales of the inrolucre narrow, nearly equal and 

 almost in a single row, more or less herbaceous: pappus ofsojl and uniform capil- 

 lary bristles: mostly low perennials, bearing solitary or few heads. 



35. A. graminifdlius, Pursh. Slightly pubescent, slender (6'- 12' high); 

 leaves very numerous, narrowly linear; branches prolonged into slender naked 

 peduncles, bearing solitary small heads; rays rose-purple or whitish. — North- 

 ern borders of New England, Lake Superior, and northward. 



§ 5. OllTHOMERIS, Torr. & Gr. Scales of the involucre regularly imbricated, 

 unequal, often carinate, with membranaceous margins, entirely destitute of herba- 

 ceous tips: jHipptts of soft and unequal capillary bristles. 



36. A. acuminatUS, Michx. Somewhat hairy; stem (about 1° high) 

 simple, zigzatr, paiiiiled-corymbosc at the sunnnit ; peduncles slender ; leaves 

 oblong-lanceolate, conspicuously pointed, coarsely toothed above, wedge-form and entire 

 at the base ; scales of the involucre few and loosely imbricated, linear-lanceolate, 

 pointed, thin (3"- 5" long) ; heads fcw or several ; rays 12-18, white, or slightly 

 purple. — Cool rich woods : common northward and southward along the Alle- 

 ghanies. Aug. — There is a depauperate narrow-leaved variety on the White 

 Mountains of New Hampshire. 



37. A. nemor^lis, Ait. Minutely roughisli-pubescent ; stem slender, 

 simple or corymbose at the summit, very leafy (l°-2° high) ; leares small (!'- 

 li' long), rather rigid, lameohtte, nearly entire, with revolute margins; scales of the 

 inversely conical involucre narrowly linear-lanceolate, the outer passing into 

 awl-shaped bracts; rays lilac-purple, elongated. — Bogs, pine barrens of New 

 Jersey to Maiui- along the coast, and northward. Also White Mountains of 

 New Hampshire; a small form, with solitary heads. Sept. 



38. A. ptarmicoides, Torr. & Gr. Smooth or roughish ; stems clus- 

 tered (6'- l.")' high), simple; /coirs linear-lanceolnte, acute, rigid, entiw, tapering 

 to the base, 1 -3-nerved, with rough margins (2' -4' long) ; heads small, in a 

 flat corymb ; scales of the involucre imbricated in 3 or 4 rows, short ; rays white 

 (2" -3" long). — Dry rocks, W. Vermont to lUiuois and Wisconsin along the 

 Great Lakes, and northward. Aug. 



