mo LXXV. COMPOSITE. NAEALua. 



cle subalveolate-fimbrillate ; scales very unequal ; pappus of scabrous , 



fragile, copious, 1 -rowed bristles. — % JLvs. alternate, entire or toUJied. 



^ Involucre imbricated. 



1. H. Canadense. Michx. (H. Kalmii. Sprcng.') Canadian Haw '.weed. 



SI. ei'ecl, subvillose, leafy, many-flowered ; lis. sessile, lanceolate . ^r ob- 

 long-ovate, acute, divaricately aau acutely dentate, the upper ones son' ew hat- 

 ntnp'exicaul, with an oLtuse base; panicles a.xillaiy and terminal, cory.ibose, 

 downy.— In open dry or rocky woods. N. Kng., N. Y., Can. Stem stout, 

 1 — -if high, more or less pubescent, the peduncles dov.my but not gldriular. 

 Leaves somewhat pubescent or hairy. Heads large and showy, with yellow 

 flowers. Involucre sometimes with a few glandular haii's. Aug. 



^ ^ Involucre calyculate. 



2. H. VEVosuM. Vciny-lcaved HaxcUwced. 



Scope or st. naked or with a single leaf, smooth, paniculate; Irs. objvate, 

 somewhat acute, entire, a little hairy above, nearly glabrous beneath, cil.'ate on 

 the margin, veins-colored ; rnvnl. glabrous, about i]0-llowered ; ach. linear. — In 

 woods, &c. N. Eng. to W. State;;. Stem 1 — ^f high, dark brown, s'ender. 

 Panicle diffuse, several times dichotomous, corymbose. Heads rather jmall,^ 

 on slender pedicels, with bright yellow flo\»4ers. Jl. Aug. 



3. H. Gronovii. Gronovins^ Hnwkweed. 



S'. leafy, hirsute, paniculate; invol. ruA pedicels glandular-pilose; radical 

 Ivs. obovate or oblanceolate, entire, .'-trigose, the midvein beneath very v lions; 

 v'pper anes oblong, closely sessile. — A hairy plant, lound on dry hills, Cai. and 

 tJ. S. Sten> about 2f high, furni.shed with a few leaves below, naked above 

 and bearing a narrow, elongated panicle. Lower leaves tapering into i long 

 stalk. Flowers yellow, on glandular, slender pedicels. Aclienia tapering up- 

 wards to a slender point, but scarcely rOstrate. Aug. Sept. 



4. H. scABRUM. Michx. (H. Marianum. Willd.) Rous^h Tlap-kw ed. 

 St. leafy, scabrous and hispid;. to. elliptic-obovate, scabrous and hirsute-, 



lower ones slightly dentate; pcd. thick, and with the in.xol. densely glanJitlar- 

 hispid ; hds. 40 — 50-flowered. — A rough plant, on dry hills, borders of \roods, 

 Can. to Car. and Ky. Stem I — 3f high, round, striate, rather stout, .'^ower 

 leaves petiolate, upper sessile, subacute, often purplish as well as the stem. 

 Heads large, with yellow flowers. Achenia obttise at apex, bright red, with 3 

 tawTiy pappu,s. Aug. 



5. H. PANicuLATUM. Slender Hawhirecd. 



5'^. slender, leafy, paniculate, whitish tomentose below; Irs. lanceolate, 

 glabrous, membranaceous, acute; panicle Ai^xx^Q \ p«^. very slender; hds. 10— 

 'iO-flowered. — A smooth, slender plant, in damp woods. Can. to Ga. Stem 1 — • 

 3f high, several times dichotomous. .Leaves thin, 2—4' long. Heads small, 

 numerous, with yellow flowers. Pedicels long and filiform, forming a, very 

 diffuse panicle. Aug. 



G. H. LONGiPiLUM. Torr. (H. barbatum. Nu/f.) 



Plant densely pilose with long, straight, ascending, bristly hairs; st. strict, 

 simple, smoothish and nearly leafless above; Ivs. crowded near the base of the 

 stem, oblong-lanceolate, attenuated to the base, entire; hds. glandular-' omen- 

 tose or hi.spid, 20 — 30-flowercd, in a small, terminal panicle. — Earrers and 

 prairies, Western States. Plant 1 — 2f high, remarkable for the long, bro vnish, 

 straight hairs with which the lower part is thickly clothed ; otherwise it more 

 nearly resembles the last. July — 'Sept. 



7. H. AURANTiAcuM. — SL leafy, hispid ; j^s. densely corymbose; Irs. c olong, 

 somewhat acute, pilose, hispid. — Native of Scotland. Flowers nnmarous, 

 large, orange-colored. One of the few species worthy of cultivation, -j- 

 PO. NAB ALUS. Cass.' 



" Nomen omiiijio sensus expert, forte mutaiidum." De Ca/uI(jHe. 



Involucre cyliudric, of many linear scales in one row, caly( ulate 

 with a few short, appressed scales at base ; receptacle naked pippus 



