GENUS 22. 



CHICORY FAMILY. 



333 



13. Hieracium Pilosella L. Mouse-ear Hawk- 

 weed. Fig. 4106. 



Hieracium Pilosella L. Sp. PI. 800. 1753. 

 Hieracium Pilosella peleterianum Mer. Nouv. Fl. Paris, Ed. 

 2, 230. 1821. 



Stoloniferous, pilose-pubescent throughout; stolons 

 leafy, rooting, slender, 3'-i2' long. Scape slender, 

 erect, 4'-is' high, leafless, with a single head, or some- 

 times 2-4; leaves oblong or spatulate, entire, obtuse or 

 acutish at the apex, narrowed into petioles, often white- 

 tomentose beneath, ii'-3' long, 4"-8" wide; head i' 

 broad or more; flowers yellow; principal bracts of the 

 involucre in I or 2 series, linear, acuminate, pubescent, 

 usually with i or 2 exterior ones ; achenes oblong, trun- 

 cate; pappus a single row of slender bristles. 



Dooryards and fields, Prince Edward Island to Ontario, 

 New York, Pennsylvania and Michigan. Adventive from 

 Europe. Ling-gowans. Felon-herb. Mouse-bloodwort. May- 

 Sept. 



14. Hieracium floribundum Wimm. & 



Grab. Smoothish Hawkweed. 



Fig. 4107. 



Hieracum floribundum Wimm. & Grab. Fl. Siles. a 2 : 

 204. 1829. 



Stoloniferous; plant glaucous-green; scape 

 loosely hirsute and more or less glandular- 

 pubescent, slender, \-2\ high, the stolons some- 

 times 8' long. Basal leaves tufted, narrowly 

 oblanceolate, acutish or obtuse, 2'-6' long, gla- 

 brous or very nearly so above, the margins and 

 midvein beneath more or less hirsute; stem- 

 leaves none, or rarely I or 2 near the base; 

 flowers several, i' broad or less, corymbose; 

 peduncles glandular ; rays bright yellow ; bracts 

 of the involucre in about 2 series, hirsute. 



In fields, New Brunswick and Maine to New York. 

 Naturalized from Europe. June-Aug. 



15. Hieracium pratense Tausch. Field 



Hawkweed. Fig. 4108. 

 H. pratense Tausch, Flora n : Part i, Erg. 56. 1828. 



Stoloniferous, hirsute or pilose with long hairs, 

 those of the stem blackish. Stem scapose, simple, 

 i-2 high, often bearing i or 2 leaves below the 

 middle; basal leaves numerous, tufted, light green, 

 oblanceolate to oblong, obtuse, 2'-$' long, 5"-io" 

 wide, narrowed into margined petioles, or to a 

 sessile base, entire, or with few distant minute 

 glandular teeth, hirsute on both sides; heads 

 several or numerous, corymbose-paniculate, 10" 

 wide, or less ; flowers yellow ; peduncles glandular 

 and often tomentose; bracts of the involucre 

 linear-lanceolate, acuminate, glandular and pilose ; 

 achenes columnar, truncate. 



Fields and roadsides, Quebec to southern New 

 York and Pennsylvania. Naturalized or adventive 

 from Europe. 



