1320 CICHORIACEAE 



4. Adopogon mont^nus (Michx.) Kuntze. Perennial, glabrous or nearly so. 

 Stems erect or decumbent, more or less branched: leaves often numerous; blades linear 

 or linear-spatulate, elongated, 8-20 cm. long, entire or pinnatifid; segments acute or 

 narrow: scapes few or numerous, 1-3 dm. long, sometimes glandular-hirsute under the 

 head: involucres glabrous; bracts linear to linear-lanceolate or oblong-lanceolate, 8-10 

 mm. long: heads bright yellow, 2.5-3 cm. broad: achenes 2.5-3 mm. long, finely 

 ribbed: pappus-bristles barely twice as long as the achene. [Krigia montana (Michx.) 

 Nutt.] 



On cliffs, on the Blue Ridge, North Carolina to Georgia. Summer and fall. 



5. Adopogon Dandelion (L.) Kuntze. Perennial, producing tubers. Stems 

 wanting or very short: leaves usually clustered; blades spatulate to linear-oblong or 

 linear, 5-15 cm. long, acute, undulate, denticulate or pinnatifid, the segments acute 

 or narrow: scapes erect or ascending, 0.5-5 dm. tall, often glandular-hirsute under the 

 head: involucres glabrous; bracts linear or narrowly linear-lanceolate: heads yellow, 

 2.5-3 cm. broad: achenes slightly over 2 mm. long, glandular-ribbed: pappus-bristles 

 twice as long as the achene. {^Krigia Dandelion (L.) Nutt.] 



In moist soil, Maryland to Kansas, Florida and Texas. Spring and summ«r. 



11. SERINE A Raf. 



Annual herbs, with low branching stems. Leaves sometimes apparently opposite: 

 blades entire or pinnatifid, some or all of them clasping. Heads small, commonly 

 broadly so: bracts often 8, membranous, all similar, concave at maturity. Eeceptacle 

 flat, naked. Flowers few; ligules yellow or orange, truncate and toothed at the apex. 

 Anthers sagittate at the base. Stigmas slender. Achenes broadest above the middle, 

 8-10-ribbed. Pappus wanting or obsolete. [^A-pogon Ell.] 



Corollas pure yellow, slightly surpassing the involucre: heads less than 5 mm. high at maturity. 



1. S. oppositifolia. 

 Corollas orange, about twice the length of the involucres: head over 5 mm. high 

 at maturity. 

 Achenes about 1 mm. long. 2. S. gracilis. 



Achenes about 1.5 mm. long. 3. S. Wrightii. 



1. Serinea oppositifolia (Eaf.) Kuntze. Foliage glabrous, or glandular on the 

 peduncles under the head. Stems commonly branched at the base; branches erect or 

 spreading, 0.5-3 dm. long, usually weak: leaf -blades various, spatulate to linear, 2-12 

 cm. long, entire or sinuate-pinnatifid, conspicuously irregular: involucres 4 mm. high 

 at maturity; bracts linear-lanceolate to ovate, acute: he^ds pure yellow: corollas 

 slightly surpassing the involucres: achenes oblong-obovate, 1.5 mm. long, ribbed and 

 minutely wrinkled: pappus wanting. [Apogon humilis Ell.] 



In sandy soil and fields, South Carolina to Kansas, Florida and Texas. Spring. 



2. Serinea gracilis (DC.) Kuntze. Foliage glabrous to the more or less copi- 

 ously glandular-pubescent peduncles. Stems branched at the base; branches ascending 

 or spreading, 1-2 dm. long: leaf -blades various, spatulate to linear, sometimes broadly 

 so, sinuate-pinnatifid or the upper ones entire: involucres 6 mm. high at maturity; 

 bracts oblong to lanceolate: ligules orange: achenes about 1 mm. long, prominently 

 ribbed and minutely transversely wrinkled: pappus wanting, or a mere vestige. 



On rocky prairies, Texas. Spring. 



3. Serinea Wrightii (A. Gray) Kuntze. Foliage glabrous, or slightly glandu- 

 lar-pubescent along the peduncles under the heads. Stems more or less diffusely 

 branched at the base; branches erect or spreading, often less than 1 dm. long: 

 leaves few; blades spatulate to linear-spatulate, 2-6 cm. long, usually acute, entire or 

 undulate: peduncles slender, sometimes longer than the rest of the branches: in- 

 volucres 5-6 mm. high at maturity; bracts broadly oblong to ovate: achenes about 

 1.5 mm. long, usually with an obscure vestige of pappus. [Apogon Wrightii A. 

 Gray.] 



In river valleys, eastern Texas. Spring. 



12. CICHORIUM L. 



Perennial herbs, with rigid branching stems. Leaves sometimes mainly basal: 

 blades toothed or pinnatifid, often crisped. Heads showy, white, pink, blue or purple, 



