360 LXXV. COMPOSITE. Nabalus. 



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



fragile, copious, 1 -rowed bristles. — % Lvs. alternate^ entire or toothed. 



^ Involucre imbricated. 



1. H. Canadense. Michx. (H. Kalmii. Spre7ig.) Canadian Uawkweed. 



St. erect, subvillose, leafy, many-flowered ; lvs. sessile, lanceolate or ob- 

 long-ovate, acute, divaricately and acutely dentate, the upper ones somewhat 

 amplexicaul, with an obtuse base ; panicles axillary and terminal, corymbose, 

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

 1— 2fhigh, more or less pubescent, the peduncles downy but not glandular. 

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

 flowers. Involucre sometimes with a few glandular hairs. Aug. 



^ § Involucre calyculate. 



2. H. VENosuM. Veiny-leaved Haivkweed. 



Scape or st. naked or with a single leaf, smooth, paniculate ; lvs. obovate, 

 somewhat acute, entire, a little hairy above, nearly glabrous beneath, ciliate on 

 the margin, veins colored; invol. glabrous, about 20-flowered; ach. linear. — In 

 woods, &c. N. Eng. to W. States. Stem 1— 2f high, dark brown, slender. 

 Panicle diffuse, several times dichotomous, corymbose. Heads rather small, 

 on slender pedicels, with bright yellow flowers. Jl. Aug. 



3. H. Gronovii. Gron^vius' Hawkvjeed. 



St. leafy, hirsute, paniculate ; invol. and pedicels glandular-pilose ; radical 

 lvs. obovate or oblanceolate, entire, strigose, the midvein beneath very villous ; 

 upper ones oblong, closely sessile. — A hairy plant, found on dry hills. Can. and 

 U. S. Stem about 2f high, furnished with a few leaves below, naked above 

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

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

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



4. H. scABRUM. Michx. (H. Marianum. W'dld.) Rough Haickiueed. 

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



lower ones slightly dentate ; pcd. thick, and with the invol. densely glandular- 

 hispid ; Ms. 40 — 50-flowered.— A rough plant, on dry hills, borders of woods. 

 Can. to Car. and Ky. Stem 1— 3f high, round, striate, rather stout. Lower 

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

 Heads large, with yellow flowers. Achenia obtuse at apex, bright red, with a 

 tawny pappus. Aug. 



5. H. PANicuLATUM. Slcndev Hawkweed. 



St. slender, leafy, paniculate, whitish tomentose below ; lvs. lanceolate, 

 glabrous, membranaceous, acute ; panicU diffuse ; ped. very slender ; hds. 10— 

 20-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. 



6. H. LONGiPiLUM. Torr. (H. barbatum. Nutt.) 



Plant densely pilose with long, straight, ascending, bristly hati's; st. strict, 

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

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

 tose or hispid, 20 — 30-flowered, in a small, terminal panicle. — Barrens and 

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

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

 nearly resembles the last. July — Sept. 



7. H. AURANTiACUM. — St. leafy, hispid ; fls. densely corymbose ; lvs. oblong, 

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

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

 80. NAB ALUS. Cass. 



" Nomen omniiio sensus expere, forte mutandiim." De CarAolU. 



Involucre cylindric, of many linear scales in one row, calyculate 

 "with a few short, appressed scales at base : receptacle naked pappus 



