300 COMPOSITE, (composite family.) 



inn loose conjmh ; leaves all radical or near the base, obovate or. oblong, nearlv 

 entire, scarcely petioled, thin and pale, purplish and glaucous underneath 

 (often hairy along the midrib), marked above with purple veins ; pedicels very 

 slender; involucre 12-35-flowered; achenes linear. — Ury plains and pine 

 woods ; common from the Atlantic to Minn, and low a. 



4. H. Mari^num, Willd. Somewhat leaf If, 2-3° high, hairy below; 

 leaves obovate-oblong, narrowed below, the radical oetiolate, rarely purplish- 

 vein i/ ; heads 20 - 40-flowered in a very open cymose panicle, the slender inflo- 

 rescence commonly ichitish-tomentulose and sparingly jlandular-hispid. — Open 

 woods and clearings; R. I. to western N. Y., and southward. — Var. spathu- 

 lXtdm, Gray, a mountain form with leaves all or mainly radical and very 

 hairy. On Two-top ^Mountain, Penn. 



5. H. SCabrum, Michx. Stem rather stout (1-3° high), leafy, '/-ow^i- 

 hair)/, the stiff panicle at first racemose, at length rati er corymbose ; the thick- 

 ish pedicels and the hoary 40-50-flowered involucre densely clothed with dark 

 glandular bristles ; leaves obovate or oval, nearly entire, hairy. — Dry open 

 woods ; common. 



* * Achenes tapering upward; heads 15 -SO-flowered in a narrow or virgate 



panicle. 



6. H. Gronovii, L. (Hairy H.) Stem wand like, mostly simple (1 -3° 

 high), leafy and very hairy below, naked above and forming a long and narrow 

 panicle ; leaves oblong or obovate, nearly entire, hairy ; slender peduncles and 

 involucre sparingly glandular-bristly; achenes with a very taper summit. — Dry 

 sterile soil ; common, especially southward. 



7. H. longipilum, Torr, (Loxg-bearded H.) Stem wand-like, sim- 

 ple, stout (2-3° high), very leafy toward the base, naked above, and bearing a 

 small racemed panicle : the lower portion and both sides of the oblong-lanceo- 

 late or spatulate entire leaves thickly clothed with very long and upright bristles 

 (often 1' long) ; peduncles and involucre glandular 1 )ristly ; achenes narrowed 

 at the apex. — Prairies, Mich, to Minn., and southwestward. 



90. CREPIS, L. 



Involucre few - many-flowered, commonly of a single row of equal scales, 

 often becoming thickened at base. Pappus copious, white and soft. Annuals 

 or biennials, not pilose. Otherwise as Hieracium. ( The Greek name of some 

 plant, from Kpriiris, a sandal.) 



C. BIENNIS, L. Somewhat pubescent, 2° high, leafy ; leaves runcinate-pin- 

 natifid ; heads rather large, corymbose ; achenes oblong, glabrous. — Yt., Mass. ; 

 rare. (Nat. from En.) 



C. tect6rum, L. Slender, branching from the base, 1° high; leaves nar- 

 roAv, runcinate ; heads small, in a loose panicle ; achenes fusiform, the ribs sca- 

 brous. — In fields, Lansing, Mich., and on ballast. (Nat. from Eu.) 



91. PRENANTHES, Yaill. Rattlesnake-root. 



Heads .5 - 30-flowered. Involucre cylindrical, of 5 to 14 linear scales in a 

 single row, and a few small bractlets at base. Achenes short, linear-oblong, 

 striate or grooved, not contracted at the apex. Pappus of copious straw-color 

 or brownish and rough capillary bristles. — Perennial herbs, with upriglit 

 leafv stems arising from spindle-shaped (extremely bitter) tubers, very variable 



