C1CH0RIA CEA E. QO 5 



bovate or oblong, ascending or erect, obtuse, narrowed at the base, sessile or peri- 

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

 I the stem similar, smaller; heads 12-20 mm. broad, 15-40-flowered, slender - 

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

 bout 8 mm. high, bracts linear-lanceolate, acute, or acuminate, glabrous or nearly 

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

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



9. Hieracium Greenii Porter and Britton. Green's Hawkweed. (I. F. f. 

 569.) Stem glabrous up to the branches, rather slender, leafless or rarely with I 

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

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

 ■tire, villous-pubescent or somewhat hispid, 10-17 cm - l° n g> I_ 5 cm - wide; heads 

 0-40-rlowered, slender-peduncled, 16-20 mm. broad; involucre 10 mm. high, 

 >r.icts linear, acute, densely pilose-glandular. In dry soil, mountains of Penn. to 

 /a. and W. Va. May-June. 



10. Hieracium umbellatum L. Narrow-leaved Hawkweed, (I. F. f. 

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

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

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

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

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

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

 iiver to Ont., Minn., Neb., Br. Col. and Ore. Also in northern Europe and Asia. 

 une-Aug. 



11. Hieracium Canadense Michx. Canada Hawkweed. (I. F. f. 3571.) 

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

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

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

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

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

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



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



12. Hieracium paniculatum L. Panicled Hawkweed. (I. F. f. 3572.) 

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



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

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

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

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

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

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

 Via. 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. 

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



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

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

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

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

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



14. Hieracium Alleghaniense Britton n. sp. Alleghany Hawkweed. 

 ptem rou'^h-hairy below, glabrous or nearly so above, about 6.5 dm. tall. Lower 

 and middle stem-leaves oblanceolate, I— 1.5 dm. long, 3 cm. wide or more, obtuse, 

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

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

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



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

 umerous: involucre about 7 mm. high, its bracts linear-lanceolate, sparingly glari- 

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

 Mleghany Mountains of \V. Va., E. S. Steele. Aug. 29, 1898. 



15. Hieracium Gronovii L. Gronovius' Hawkweed. Hairy Ha wkweed. 

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



