COMPOSIT.E. (COMPOSITi: FAMILY.) 299 



bearing one or more yellow heads. (Name hom hfuv, a lion, and oSovs, a tooth, 

 in allusion to tlie toothed leaves.) — 'Die following helonr,^s to tlie subgenus 

 Oj'oufMA, with a tawny pappus of a single roiv of equal bri.stlos. 



Ij. aitlmnXlis, L. (Fall Dandllion.) Leaves laeiniate-toothed or 

 pinnatifid, somewhat pubescent; scape branched, .'i - 1 .'/ high; peduncles 

 thick(!ned at the summit, scaly-bracteate. — Meadows and roadsides; N. Kng. 

 to Teuu. June -Nov. (Nat. from Eu.) 



88. PICRIS, L. 



Heads many-flowered, terminating leafy stems. Outer scales loose or spread- 

 ing. Achenes terete, with 5-10 rugose ribs ; pappus of 1 or 2 rows of plumose 

 bristles. — Coarse rough-bristly annuals or biennials, with yellow flowers. (The 

 Greek name of some allied bitter herb, from -niKpos, hitter') 



P. Hip:RACioh)Es, L. Kather tall, corymbosely branched, the bristles 

 somewhat barbed at tip ; leaves lanceolate or broader, clas])ing, irregularly 

 toothed; achenes oblong, with little or no beak. — Sparingly introduced. 

 (Nat. from Eu.) 



89. HIERACIUM, Tourn. Hawk weed. 



Heads 12 -many-flowered. Involucre more or less imbricated. Achenes 

 short, oblong or columnar, striate, not beaked ; pappus a single row of tawny 

 and fragile capillary rough bristles. — Hispid or hirsute and often glandular 

 perennials, with entire or toothed leaves, and single or panicled heads of mostly 

 yellow flowers; summer and early autumn. (Name from Upa^, a hawk.) 



§ 1. Involucre not much imbricate, scared i/ cahjculate; achenes oblong ; pappus 



not copioua. 



H. aurantiacum, L. Low, long-hirsute, above hispid and glandular, the 

 involucral hairs dark ; leaves all near the base of the simple peduncle; heads 

 clustered ; flowers deep orange to flame-color. — Roadsides and fields ; N. Eng. 

 to N. Y. (Nat. from Eu.) 



H. PRyEALTLM, \'ill. Glaucous, 2° high, only the base and lanceolate 

 leaves hairy ; heads in an open cyme ; flowers yellow. — N. New York ( Word). 

 (Nat. from Eu.) 



§ 2. Head. 'i large ; involucre irregularis imbricated ; achenes columnar ; pa]>pus 

 copious, une(]ual. 



H. MUR6RrAr, L. Stem scape-like, low; leaves oval or oblong, obtuse, 

 toothed toward the subcordate base ; heads few, dark-glandular. — Open woods 

 near Brooklyn, N. Y. (Nat. from Eu.) 



1. H. Canadense, Michx. Stems simple, leafy, corymbed at the sum- 

 mit (1-3^ liigb) ; leaves sessile, lanceolate or ovate-oblong, acute, remotely 

 and very coarsely toothed, somewhat hairy, the uppermost slightly clasjiing. 

 — Dry woods, N. Eng. to Penn., Minn., and northward. 



§3. Heads small ; involucre cylindrical, scared j imbricated. 

 * Achenes columnar, not attenuate upward irhen mature ; panicle not virgate. 



2. H. paniCUlktum, L. Stein slender, leaf//, diffusehf branched, 

 hairy only below (1-3° high); leaves lanceolate, acute at both ends, slightly 

 toothed, smooth; heads (very small) in a loose panicle, on sleuder and diverg- 

 ing pedicels, \2-20-Jfowered ; achenes short. — Open woods; rather common. 



3. H. vendsum, L. (Rattlesnake-wekd.) Stem or scape (1-2° 

 high) naked or with a single lea/, smooth and slender, forking above into a spread- 



