Vol.. III.] 



CHICORY FAMILY. 



283 



(b) Principal bracts in i series; heads small, paniculate or racemose. 

 I. Achenes columnar at maturity, truncate. 

 Plant nearly or quite glabrous; heads is-20-flowered. 12. H. paniculaltim. 



Plants scabrous or glandular; heads 15-50-flowered. 



Peduncles stout, spreading; no tuft of basal leaves at flowering time. 13. H. scabrum. 

 Peduncles slender, ascending; basal leaves present at flowering time. 8. H. Marianum. 



2. .\chenes spindle-shaped, or with a tapering summit at maturity. 



14. //. Gronoi'ii. 



15. H. longipilum. 



Leaves and lower part of the stem pilose. 



Leaves and stem densel3- clothed with very long brown hairs, 



I. Hieracium Pilosella L, 



Hieracium Pilosella L. Sp. PI, Sew. 1753. 



Stoloniferous, pilose-pubescent throughout; stolons 

 leafy, rooting, slender. 3'-! 2' long. Scape slender, 

 erect, 4'-io' high, leafless, with a single head; leaves 

 obloug or spatulate, entire, obtuse or acutish at the 

 apex, narrowed into petioles, often white-tomentose 

 beneath, I'/i'-j' long, 4"-S" wide; head i' broad 

 or more; flowers yellow; principal bracts of the in- 

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

 usually with i or 2 exterior ones; achenes oblong, 

 truncate; pappus a single row of slender bristles. 



Dooryards and fields, Ontario, New York, Pennsylva- 

 nia and Michigan. ,\dventive from Kurope. Called also 

 LingGowans, Felon-herb, Mouse Bloodwort. May-Sept. 



Hieracium Pilosella Peleterianum Mer. Nouv. Fl. Paris, 



Ed. 2, 230. 1821. 

 Stolons shorter, thick; plant silky-pubescent. Fields 

 and roadsides, Prince Edward Island, 

 Europe. 



Mouse-ear Hawkweed. (Fig. 3561.) 



Naturalized from 



2. Hieracium murdrum L,. Wall 

 Hawkweed. (Fig. 3562.) 



Hieracium tnniornm L. Sp. PI. 802. 1753. 



vStem pubescent or glabrate, simple, or with i or 

 2braDches, i°-2^°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'-4' long, i'-2' wide, the petioles villous; stem 

 leaves i or 2 (sometimes none), short-petioled or 

 sessile; heads 2-several, corymbose, about i' broad; 

 peduncles ascending, usually glandular; involucre 

 4"-5" high, its bracts linear-lanceolate, acute, 

 glandular-pubescent, imbricated iu 2 or 3 scries; 

 achenes columnar, truncate; pappus of slender 

 nearly white bristles. 



Woodlands near Brooklyn, 

 Adventive or fugitive from 

 French or Golden Lungwort. 



N. Y. ; about Quebec. 

 Europe. Called also 

 June-Aug. 



3. Hieracium vulgatum Fries. Hawkweed. 

 (Fig. 3563-) 



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

 //. vulgalum Fries, Fl. Hall. 128. 18(7-18. 



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 dentate or denticulate, pctioled, 2'-5' long, 

 yi'-i'-i' wide, stem leaves similar, short-petioled or 

 sessile; petioles more or less pubescent; heads several, 

 corymbose, smaller than those of H. muroruDi or as 

 large; peduncles mostly glandular, straight; bracts of 

 the involucre imbricated in 2 or 3 scries, linear, acum- 

 inate, mostly glandular; achenes columnar, truncate; 

 pappus copious. 



Labrador and Xewfoundand to Quebec, and in southern 

 New York and New Jersey. Probably introduced. Also 

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



