446 8YNGENESIA [Cichorace* 



x\\* lower ones narrowed to winged petioles. Heads of flowers rather small (about 

 half an inch long, and 1 fourth to 1 third of an inch In diameter, in an oblong ter" 

 minal panicle 9 to 18 inches in length ; peduncles half an inch to an inch lone 

 rather slender, clothed with a few small lance-ovate bracteate scales. Involucre 

 ovoid-oblong, ventricose at base ; leaflets often tinged with dark purple. florets 

 blue. Akenes strongly ribbed ; paj^pus somewhat scabrous, brittle, pale brown, or 

 dirty white. 



Ilab. Fence-rows ; thickets, &c. frequent. FL August. Fr. September. 



Obs. 1 have often observed specimens with the florets pale blue,— which 1 for- 

 merly supposed to be the S. leucophaus y Willd. and accordingly inserted that 

 species in my Cataloguo ; but upon a review of all my collections, I am unable to 

 perceive any distinctive characters, suflicient to Justify the continuance of that 

 species in this work. 



4. S. acuminatus, WilUL Radical leaves slightly runcinate, caulin© 

 ones ovate, acuminate, petiolate ; heads of flowers paniculate ; pedun- 

 cles somewhat squamose-bracteatc. Willd* Sp. 3. p. 1521. 

 Lactuca villosa. Beck, But. p. 170. 



Acuminate Sonchus. 



Root biennial. Stem 3 to 6 feet high, terete, smooth, paniculate at summit 

 Leaves 3 to 5 or 6 inches long, and 1 to 2 or 3 inches wide, generally lance-ovaij 

 (sometimes nearly deltoid, or triangular-hastate), acuminate, sinuate-demiculau 

 smooth above, often pilose on the nerves beneath, abruptly narrowed at base to * 

 winged tapering petiole 1 or 2 inches in length. Heads of flowers small, in a rather 

 loose panicle, sometimes racemose on the branches ; peduncles 1 line to half an 

 jnch long, slender, with a few minute bracteate scales. Involucre oblong, sUghtlv 

 ventricose ; leaflets often tinged with dark purple, the outer ones lance-uvatc 

 short. Florets blue. Akenes compressed, ovate-lanceolate, acuminately tapering 

 at apex, but scarcely beaked (pappus stipitate, £»8.)i pappus minutely scabrous, 

 rather brittle, white. 



Hub. Woodlands, and thickets: frequent. Fl. August. /V.September. 



Obs. Four or five additional species are enumerated in the U. Slates. 



Hub-Tribe 7. Hierjlcie.b. Papjms hair-like, stiflish and very brittle, becoming 

 a dirty yellow, never plumose, the hain* exactly linear. Receptacle with, or with- 

 out bracts* 



367. HIERACIUM. L. JVn//. Gen. 631. 

 [Gr- Hierax, a hawk; from a notion that hawks sharpened their sight with its juice] 



Involucre ovoid-oblong, imbricated. Jikenes terete, 10-ribbed, not 

 beaked, truncate at apex. Pappus in a single series, litceptack 

 naked, alveolate, or villose. 



1. H. vkxosum, L. Stem scape-like, mostly naked, smooth, co- 

 rymbose-paniculate ; leaves obovate-oblong and lanceolate, entire, 

 margin ciliate, veins purple ; involucres smooth. Beck, But. p. 166, 

 Veined Hieracium. Vulgo — Hawkwecd. 



Root perennial. Stem 1 to 2 feet high, scape-like, naked, or with few leaves 

 corymbose-paniculate at summit. Leaves mostly all radical, 2 to 4 or 5 inches 

 long, and I to near 2 inches wide, varying from obovate to lance-or lone*, tapering 

 almost to a petiole at base, more or less hairy, especially on the midrib beneath, 

 ufton nearly snaooth above, the veins conspicuous, dark purple, or sometimes 



