CICHORIACEAE 1319 
to ovate-lanceolate, 4-5 mm. long, becoming keeled, firm: achenes barely 1.5 mm. long, 
ribbed and transversely wrinkled : pappus-scales broadly obovate, the bristles alternating 
with those over the stronger ribs about as long as the pappus-scales or wanting. 
On prairies, Missouri to Arkansas and Texas. Spring. 
2. Adopogon Carolinianus ( Walt.) Britton. Annual, often pubescent, glauces- 
cent. Leaf-blades spatulate or nearly linear in outline, 2-12 cm. long, coarsely toothed, 
deeply pinnatifid : scapes erect or ascending, 3-40 cm. tall, usually glandular-hirsute under 
the head : involucres glabrous ; bracts 9-18, linear to lanceolate, 4-5 mm. long, thin, nerve- 
less: achenes 1.5 mm. long, 5-angled, narrowly turbinate: pappus-bristles about twice as 
long as the achenes and many times longer than the rounded obovate scales. [Krigia 
Virginica Willd. ] 
In dry soil, Maine to Ontario and Minnesota, south to Florida and Texas. Spring and summer. 
3. Adopogon Virginicus (L.) Kuntze. Perennial, glabrous or nearly so. Stems 
erect, 1-7 dm. tall, simple or branched, sometimes scape-like : leaf-blades spatulate, ob- 
long or oval, 5-20 cm. long, obtuse or acute, entire, repand or somewhat lyrate, often nar- 
rowed into broadly-winged petioles; stem-leaves with small sessile partly clasping 
blades: peduncles sometimes glandular-hirsute under the heads: involucres glabrous ; 
bracts linear or linear-lanceolate: heads 1-1.5 cm. long, orange to reddish orange: 
achenes 2 mm. long, nearly oblong: pappus 10-15 small oblong scales and as many or 
more bristles longer than the achene. [Krigia amplexicaulis Nutt. ] 
In meadows and moist open woods, Massachusetts to Ontario, Manitoba, Georgia, and Kansas. 
Spring to fall. 
4. Adopogon montànus (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 : invo- 
lucres glabrous; bracts linear to linear-lanceolate or oblong-lanceolate, 8-10 mm. long: 
heads bright yellow, 2.5-3 em. 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 Dandélion (L.) Kuntze. Perennial, producing tubers. Stems want- 
ing 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: invo- 
lucres 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 summer, 
11. SERINEA 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. Receptacle flat, naked. 
Flowers few ; ligules yellow or orange, truncate and toothed at the apex. Anthers sagit- 
tate at the base. Stigmas slender. Achenes broadest above the middle, 8-10-ribbed. 
Pappus wanting or obsolete. [Apogon Ell. ] 
Corollas pure yellow, slightly surpassing the involucre : heads less than 5 mm. high " grae ifolia. 
Corollas orange, about twice the length of the involucres: heads over 5 mm. high 
Achenes aback Í ] 2. S. gracilis 
chenes abou mm. jong. ^ Ww H^ 
Achenes about 1.5 mm. long. 3. S. Wrightit. 
1. Serinea oppositifdlia (Raf.) Kuntze. Foliage glabrous, or glandular on the a 
duncles under the head. Stems commonly branched at the base ; branches erect or spread- 
ing, 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: heads pure yellow: corollas slightly s ars 
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 grácilis (DC.) Kuntze. Foliage glabrous to the more or less copi- 
ously glandular-pubescent peduncles. Stems branched at the base ; branches ascending or 
