360 LXXV. COMPOSITiE. Nabalus. 



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



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



^ Involucre imbricated. 



1. H. Canadense. Michx. (H. Kalmii. Spreng.) Canadian Hawkweed. 



St. erect, subvillose, leafy, many-flowered ; lis. 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 — 2f high, 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 Hav^kweed. 



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. Groiiovius' Hawkweed. 



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

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

 vpper 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. Willd.) Rongh Hawkweed. 

 St. leaf)', scabrous and hispid ; hs. elliptic-obovate, scabrous and hirsute, 



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

 hispid ; hds. 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. Sleudcr Hawkweed. 



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

 glabrous, membranaceous, acute; panicle 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 hairs ; 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. Icafy, hispid ; /5. dcnscly 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 omnino sensus expers, forte mutandum." De Candolle. 



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

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



