286 



CICHORIACEAE. 



[Vol. III. 



io. Hieracium umbellatum L,. Nar- 

 row-leaved Hawkweed. (Fig. 3570.) 



Hieracium umbellatum L. Sp. PI. 804. 1753. 



Stem rather slender, glabrous or puberulent, 

 sometimes hispid below, usually very leafy 

 nearly or quite up to the inflorescence, usually 

 simple, i-2^high. Leaves lanceolate or lin- 

 ear-lanceolate or the lowest spatulate, entire, 

 denticulate or sometimes laciniate-dentate,acute 

 or acuminate, narrowed to a sessile base, i / -3 A 

 long, 2 // -6' / wide, glabrous above, mostly 

 somewhat pubescent beneath, the margins com- 

 monly ciliolate; no tuft of basal leaves at 

 flowering time ; heads few or several, corymbose, 

 about \' broad; peduncles rather stout, canes- 

 cent; involucres 5 // -7 // high, glabrous or 

 nearly so, its bracts imbricated in 2-3 series, the 

 outer spreading; flowers bright yellow; achenes 

 columnar, truncate; pappus copious, brownish. 



Lower St. Lawrence River to Ontario, Minne- 

 sota, Nebraska, British Columbia and Oregon. 

 Also in northern Europe and Asia. June-Aug. 



11. Hieracium Canadense Michx. 

 Canada Hawkweed. (Fig. 3571.) 



H. Canadense Michx. PI. Bor. Am. 2: 86. 1803. 

 Stemerect,firm,glabrateorpubescent,leafy, 

 i-5 high. Leaves numerous, oblong-lan- 

 ceolate 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 margins 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 \' 

 broad; involucre about 6" high, pubescent or 

 puberulent, its bracts imbricated in 2-3 series, 

 the outer spreading; flowers yellow; achenes 

 columnar, truncate; pappus copious, brown. 



In dry woods and thickets, Nova Scotia to 

 Ontario and the Northwest Territory, south to 

 New Jersey and Michigan. July-Sept. 



12. Hieracium paniculatum L,. Pan- 

 icked Hawkweed. (Fig. 3572.) 

 Hieracium paniculatum L. Sp. PL 802. 1753. 



Glabrous throughout, or somewhat pilose-pu- 

 bescent below, stem paniculately branched above, 

 leafy, slender, i-3 high. Leaves thin, lanceo- 

 late or oblong-lanceolate, acute or acuminate at 

 the apex, narrowed to a sessile base, or the lowest 

 into petioles, denticulate or dentate, 2 / -6 / long, 

 3 // -i2 // wide; no tuft of basal leaves at flowering 

 time; heads 5 // ~7 // broad, commonly numerous, 

 corymbose-paniculate, 12-20-flowered, peduncles 

 slender, often drooping; peduncles quite glabrous 

 or sometimes glandular; involucre about 3" high, 

 glabrous or nearly so, its principal bracts in 1 se- 

 ries, linear, acute with a few very small outer ones 

 at the base; flowers yellow; achenes columnar, 

 truncate; pappus brown, not very copious. 



In dry woods.Maine, Quebec and Ontario to Georgia, 

 Alabama and Kentucky. Ascends to 4600 ft. in Vir- 

 ginia. July-Sept. 



