318 CICHORIACEAE. 



crests near the apex. Corollas yellow. Stigmas slender, filiform-clavate. 

 Achenes fusiform, the inner ones, at least, slender-beaked. Pappus single, the- 

 bristles plumose. 



1. H. radicata L. Plants perennial, 2-6 dm. tall: leaves mostly 4-17 cm- 

 long, hirsute; blades spatulate in outline, coarsely toothed or pinnatifid: 

 heads 2.5-4 cm. wide: corollas with very narrow ligules: achenes fusiform,, 

 the bodies 3-3.5 mm. long, spinulose, those of the inner ones at least shorter 

 than the filiform beaks. — S. Occasional, in wet pastures. Nat. of Eu. — 

 Spr. and sum. 



11. KRIGIA Schreb. Annual herbs. Leaves mainly basal; blades nar- 

 row, toothed or pinnatifid. Heads slender-peduncled. Involucre narrow : 

 bracts narrow, reflexed at maturity. Corollas light-yellow. Achenes decidedly 

 broadened upward. Pappus of 5 scales about i as long as the aehene and also 

 of 5 or 10 bristles. 



1. K. virginica (L.) Willd. Plants 0.3-4 dm. tall: leaf -blades spatulate to 

 nearly linear, 2-12 cm. long: involucres mostly less than 7 mm. long: corollas 

 6-7 mm. long : achenes fully 1.5 mm. long, finely ribbed. — Common, in open 

 sandy places. — Spr. — Dwarf-dandelion. 



12. CYNTHIA D. Don. Perennial herbs. Leaves mainly basal: blades 

 narrow or broad, entire, repand, or pinnatifid. Heads long-peduncled. Invo- 

 lucre stout: bracts narrow, reflexed at maturity. Corollas bright-yellow.. 

 Achenes not broadened upward. Pappus of 10-15 minute scales and more 

 numerous bristles. 



1. C. virginica (L.) D. Don, Plants 1-7 dm. tall: leaf -blades spatulate, 

 oblong or oval, not elongate, entire or repand or slightly lyrate-piniiatifid: 

 involucres mostly over 8 mm. long: corollas 10-12 mm. long: achenes 2 mm. 

 long, coarsely ribbed. — N. Occasional, in meadows. — Sandstones and shales.. 

 — Sum. — Cynthia. 



13. CICHORIUM [Tourn.] L. Perennial rigid herbs. Leaf-blades 

 toothed or pinnatifid, or crisped. Heads sessile or nearly so. Involucre firm or 

 rigid: outer bracts sjareading, the inner erect. Achenes 5-ribbed or 5-angled. 

 Pappus of 2 or 3 rows of scales. — • Chicory. Succory. 



1. C. Intybus L. Tap-root elongate, tough. Stem 3-15 dm. tall, rit^'dly wide- 

 branched: blades of the stem-leaves oblong to lanceolate, pinnatifid, toothed,, 

 or entire: involucres 10-12 mm. long; bracts lanceolate to linear, the outer 

 glandular-ciliate: corollas sky-blue or white: ligules 10-20 mm. long: achenes 

 2-2.5 mm. long. — Common, in fields and on roadsides. Nat of Eu. — Sum^ 

 — ■ Common-chicory. Blue-sailors. 



