COMPOSITE. 225 HIEEACinM. 



3. S. arve'nsis. 



Involucre and -peduncles hispid, subumbelled ; leaves runcinate, denticulate, 

 cordate at the base ; 70oi creeping. Cultivated grounds. Stem about 2 feet 

 high, angular. Flowers large, deep yellow. Aug. Per. Com Sow- Thistle. 



66. HIERA'CIUM. 

 Involucre more or less imbricated, ovate ; receptacle sub- 

 favose; pappus simple, hairy, copious, persistent; achenia 

 not beaked. 



Gr. i^Qci-^, a haiok ; from the exploded notion that the hawk and othorbirds 

 of prey made use of the juice of this plant to strengthen their vision. Involu- 

 cre many-flowered, with very unequal scales. 



1. H. VENO'SUM. 



Scape naked, smooth, paniculate ; leaves obovate, somewhat acute, entire, a 

 little hairy above, nearly glabrous beneath, ciliate on the margins, the veins 

 colored ; involucre glabrous. Found in woods, &c. Leaves all radical, 

 spreading on the ground, remarkably distinguished with dark red spots and 

 veins. Scape or stem ] — 2 feet high, nearly or quite naked, of a dark brown 

 color, bearing a diffuse, terminal, corymbose panicle of rather small heads on 

 slender pedicels and with bright yellow flowers. Achenia linear. July, 

 Aug. Per. Veiny-leaved Haiokweed. 



2. H. Grono'vii. 



Stem leafy, hirsute, paniculate ; involucre and pedicels glandular-pilose ; 

 radical leaves obovate or oblanceolate, entire, strigose, the midrib beneath 

 very villous ; upper ones oblong, closely sessile. A hairy plant, found on dry 

 hills. Stem about 2 feet 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 upwards to a slender point, but scarcely rostrate. Aug. Sept. Per. 



Gronoviiis' Hawkweed. 



3. H. CaNADE'nSE. Mx. H. Kalmii. Spr. 

 Stem erect, subvillose, leafy, many-flowered ; leaves sessile, lanceolate or 



oblong-ovate, acute, divaricately and acutely dentate, the upper ones some- 

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

 corymbose, downy. Rocky woods. Stem I — 2 feet high, more or less 

 pubescent. Flowers large and showy, yellow, on thick, downy pedicels. 

 Aug. Per. Canadian Hawkweed. 



4. H. panicula'tum. 



Smoothish ; stem erect, leafy, whitish tomentose below ; pedicels capillary ; 

 heads ]0 — 18-flowered; leaves lanceolate, dentate, naked, membranaceous. 

 About a foot in bight, found in damp woods. Stem slender. Leaves thin. 

 Heads quite small, numerous on long, slender pedicels, formmg a very 

 branching panicle. Aug. Per. Panicled Haickweed. 



5. H. SCABRUM. Mx. H. Marianum Willd. 

 Stem, erect, villous ; leaves elliptic-obovate, with stiff" bristles, and villous on 



the midrib, the lower ones slightly dentate ; pedicels and cabjx downy ; heads 

 25 — 40-flowered. A rough species, found on sandy hills. Stem about 2 feet 

 high, very rough, round, striate, bearing at top a small dense panicle of yellow 

 flowers. Leaves sessile, with a broad, rounded point. Pedicels and calyx 

 glandular-hispid. Aug. Per. 



