C1CHORIA CEA E. 905 



obovate or oblong, ascending or erect, obtuse, narrowed at the base, sessile or peti- 

 oled, villous or hirsute, glandular-denticulate, 5-20 cm. long, 3-5 cm. wide, those 

 of the stem similar, smaller; heads 12-20 mm. broad, i5-4O-flowered, slender - 

 peduncled; peduncles more or less glandular and sometimes canescent ; involucre 

 about 8 mm. high, bracts linear-lai ceolate, acute, or acuminate, glabrous or nearly 

 so, with a few short outer ones. In dry woods and thickets. R. I. to southern N. 

 Y., Penn., Ky., Ala. and Fla. May-July. 



9. Hieracium Greenii Porter and Britton. GREEN'S HAWKWEED. (I. F. f. 

 3569.) Stern glabrous up to the branches, rather slender, leafless or rarely with I 

 or 2 leaves, 4-7 dm. high. Basal leaves tufted, ascending, spatulate, oblong, or 

 obovate, obtuse, narrowed at the base, mostly petioled, glandular-denticulate or 

 entire, villous-pubescent or somewhat hispid. 10-17 cm - l n g? i~5 cm. wide; heads 

 3O-4o-flowered, slender-peduncled, 16-20 mm. broad; involucre 10 mm. high, 

 bracts linear, acute, densely pilose-glandular. In dry soil, mountains of Penn. to 

 Va. and W. Va. May-June. 



10. Hieracium umbellatum L. NARROW-LEAVED HAWKWEED. (I. F. f. 

 3570.) Stem rather slender, glabrous or puberulent, 3-7 dm. high. Leaves lance- 

 olate or linear-lanceolate or the lowest spatulate, entire, denticulate or sometimes 

 laciniate-dentate, acute or acuminate, narrowed to a sessile base. 3-7 cm. long, 

 4-12 mm. wide, glabrous above, mostly somewhat pubescent beneath, the margins 

 commonly ciliolate; heads about 25 mm. broad; peduncles rather stout, canescent; 

 involucre 10-14 mm. high, the outer bracts spreading. Lower St. Lawrence 

 River to Out., Minn., Neb., Br. Col. and Ore. Also in northern Europe and Asia. 

 June-Aug. 



11. Hieracium Canadense Michx. CANADA HAWKWEED. (I. F. f. 3571.) 

 Stem erect, firm, glabrate or pubescent, 3-15 dm. high. Leaves numerous, oblong- 

 lanceolate, ovate-oblong, or lanceolate, acute or acuminate at the apex, rounded, 

 sessile, and, at least the upper ones, clasping at the base, 3-7 cm. long, 6-25 mm. 

 wide, serrate or incised, the margins sometimes ciliolate, glabrous or pubescent 

 beneath, the lowest somewhat spatulate and petioled; heads about 25 mm. broad; 

 involucre about 12 mm. high, outer bracts spreading. In dry woods and thickets, 

 N. S. to Out. and the N. W. Terr., south to N. J. and Mich. July-Sept. 



12. Hieracium paniculatum L. PANICLED HAWKWEED. (I. F. f. 3572.) 

 Glabrous throughout, or somewhat pilose-pubescent below, stem paniculately 

 branched above, leafy, slender, 3-9 dm. high. Leaves thin, lanceolate or oblong- 

 lanceolate, acute or acuminate at the apex, narrowed to a sessile base, or the lowest 

 into petioles, denticulate or dentate, 5-15 cm. long, 6-25 mm. wide; heads 10-14 

 mm. broad; peduncles filiform, often drooping, glabrous or sometimes glandular; 

 involucre about 6 mm. high, glabrous or nearly so, bracts linear, acute, with a few 

 very small outer ones at the base. In dry woods, Me., Quebec and Ont. to Ga., 

 Ala. and Ky. July-Sept. 



13. Hieracium scabrum Michx. ROUGH HAWKWEED. (I. F. f. 3573.) 

 Stem stout, leafy, densely hirsute or hispid below and glandular-pubescent above, 

 strict, 3-12 dm. high. Leaves hirsute, obovate, oblong, or broadly spatulate, 

 5-10 cm. long, 2-4 cm. wide, obtuse at the apex, narrowed to the sessile base or 

 the lowest into margined petioles, denticulate; heads 12-16 mm. broad; pedun- 

 cles stout, densely glandular; involucre 8-10 mm. high, glandular; bracts linear, 

 acute, with a few very small outer ones. In dry woods and clearings, N. S. to 

 Minn., Ga., Neb. and Kans. July-Sept. 



14. Hieracium Alleghaniense Britton n. sp. ALLEGHANY HAWKWEED. 

 Stem rough-hairy below, glabrous or nearly so above, about 6.5 dm. tall. Lower 

 and middle stem-leaves oblanceolate, 1-1.5 dm. ' on g? 3 cm - wide or more, obtuse, 

 cuspidate, tapering into narrowly margined pubescent petioles, thin, pale and 

 pubescent along the midvein beneath, green above, with a few very distant minute 

 glandular teeth; upper leaves oblong to oblong-lanceolate, acute, narrowed to a 

 sessile base; inflorescense paniculate, its branches filiform, glandular; heads rather 

 numerous ; involucre about 7 mm. high, its bracts linear-lanceolate, sparingly glan- 

 dular, a little shorter than the brown pappus; young achenes truncate. Aurora, 

 Alleghany Mountains of W. Va., E. S. Steele, Aug. 29. 1898. 



15. Hieracium Gronovii L. GRONOVIUS' HAWKWEED. HAIRY HAWKWEED. 

 (I. F. f. 3574.) Stem stiff, mostly slender, leafy and villous or hirsute, sometimes 



