360 LXXV. COMPOSITE. NABALUS. 



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



fragile, copious, 1 -rowed bristles. 1\- Lvs. alternate, entire or toothed. 



Involucre imbricated. 



1. H. CANADENSE. Michx. (H. Kalmii. Spreng.') Canadian Hawkweed. 



St. erect, subvillose, leafy, many-flowered ; Ivs. 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 Hawkweed. 



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

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

 the margin, veins colored; invol. glabrous, about '20-flowered; acJi. 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. Gronovius' Hawkweed. 



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

 Ivs. 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. Willd.} Rough Hawkweed. 

 St. leafy, scabrous and hispid j Ivs. elliptic-obovate, scabrous and hirsute, 



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

 hispid ; Ms. 40 50-flowered. A rough plant, on dry hIRs, 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. Slender Hawkweed. 



St. slender, leafy, paniculate, whitish tomentose below ; Ivs. 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 ai\d filiform, forming a ver} r 

 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 ; Ivs. 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 ; Ivs. oblong, 

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

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



80. NABALUS. 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 



