GENUS 22. 



CHICORY FAMILY. 



3 2 9 



i. Hieracium murorum L. Wall Hawk- 

 weed. Fig. 4094. 



Hieracium murorum L. Sp. PI. 802. 1753. 



Stem pubescent or glabrate, simple, or with I or 

 2 branches, i-2j high. Basal leaves thin, ovate or 

 oblong, obtuse or acute, cordate or truncate at the 

 base, or abruptly narrowed into petioles, coarsely 

 dentate or laciniate, at least near the base, 2'-^' long, 

 i '-2' wide, the petioles villous ; stem leaves i or 2, 

 short-petioled or sessile, sometimes none; heads 

 2-several, corymbose, about i' broad; peduncles as- 

 cending, usually glandular ; involucre 4"-$" high, its 

 bracts linear-lanceolate, acute, glandular-pubescent, 

 imbricated in 2 or 3 series; achenes columnar, trun- 

 cate; pappus of slender nearly white bristles. 



Woodlands near Brooklyn, N. Y., Northampton, 

 Mass., and about Quebec. Adventive or fugitive from 

 Europe. French or golden lungwort. June-Aug. 



2. Hieracium vulgatum Fries. 

 Fig. 4095. 



Hawkweed. 



H. molle Pursh, Fl. Am. Sept. 503. 1814. Not Jacq. 1774. 

 H. vulgatum Fries, Fl. Hall. 128. 1817-18. 



Similar to the preceding species, sometimes taller 

 and slightly glaucous; stem 2-5-leaved, pubescent or 

 glabrate. Basal leaves oblong or lanceolate, acute at both 

 ends, or some of them obtuse at the apex, coarsely den- 

 tate or denticulate, petioled, 2'-$' long, \'-\\' wide, often 

 mottled; stem leaves similar, short-petioled or sessile; 

 petioles more or less pubescent; heads several, corym- 

 bose, smaller than those of H. murorum or as large ; 

 peduncles mostly glandular, straight; bracts of the in- 

 volucre imbricated in 2 or 3 series, linear, acuminate, 

 mostly glandular; achenes columnar, truncate; pappus 

 copious. 



Labrador and Newfoundland to Quebec, and in southern 

 New York and New Jersey. Naturalized from Europe. 

 Also in Greenland, northern Europe and Asia. July-Sept. 



3. Hieracium canadense Michx. Canada 

 Hawkweed. Fig. 4096. 



H. canadense Michx. Fl. Bor. Am. 2: 86. 1803. 



Stem erect, firm, glabrate or pubescent, leafy, 

 i-S high. Leaves numerous, ovate, oblong- 

 lanceolate, ovate-oblong, or lanceolate, acute or 

 acuminate at the apex, rounded, sessile, and, at 

 least the upper ones, clasping at the base, i'~3' 

 long, 3"-i2" wide, serrate or incised, the mar- 

 gins sometimes ciliolate, glabrous or pubescent 

 beneath, the lowest somewhat spatulate and 

 petioled ; no tuft of basal leaves at flowering 

 time ; heads usually numerous, corymbose- 

 paniculate, about i' broad; involucre about 6" 

 high, pubescent or puberulent, its bracts imbri- 

 cated in 2-3 series, the outer spreading; flowers 

 yellow ; achenes columnar, truncate ; pappus 

 copious, brown. 



In dry woods and thickets, Newfoundland and 

 Nova Scotia to Ontario, British Columbia, New 

 Jersey, Indiana, Michigan, South Dakota and 

 Oregon. July-Sept. High dandelion. 



