1350 CARDUACEAE 
Leaves somewhat fleshy : involucres nearly cy- 
lindric, the bracts thick, the outer ovate, the 
inner with erect tips. 54. S. Elliottii. 
ipis" 2 fleshy: involueres broadly cam- 
ulate or cylindric, the bracts thin or 
chatty, ti the outer lanceolate or ovate- 
Jance 
Involucre b fondi y campanulate, 5 mm. high ; 
bracts thin, but firm, the outer ovate- 
HERE eolate, acutish, the inner with erect 
Ips, 55. S. Edisoniana. 
Involucre cylindrie, 6 mm. high; bracts thin 
1 chaffy, the outer lanceolate, acumi- 
: inne vith inflexed or in- 
curved tips 56. S. mirabilis, 
o SEROTINAE 
Plant with long horizontal stol : basal rosettes wanting or very inconspicu- 
ous: stem closely leafy, the lea t blades triple- ribbed, usually serrate: heads Lhe 
small to medium- sized, 2-7 mm. high, unilaterally racemose in our species : stigmas 
triangular-lanceolate : 'achene pubescent. 
Branches of the inflorescence glabrous. 
Branches of the inflorescence pubescen 
tem 
E 51. S. glaberrima. 
S S Eu glabrous (minutely pulverulent): head 
4.5-6 m hi igh: 
58. S. serotina. 
Stems Hor. E 
uid 0-3 puo high: achene about d engi of 
the us: main stem glabrous or hai 59. S. canadensis. 
a 3-5 mm, high: achene half n length. e m. 
)appus :: main Sion conspi sly ha 
east at the bases of due petioles 
tae leaf-blades narrowly la ecole or oblanceo- 
late: stem E below the petioles 60. S. Leaveniworthii. 
Larger ' leaf- blade nceolate or 'oblong- 
lanceolate bnc: m Su EO ent all over. Gi. S. hirsutissima, 
1. S. glomerata Michx. Stem stout, 3-11 dm. tall, apple a eae ously 
angled: blades of the basal leaves thin, 8— 15 em. long, 2.5-5 em. wide, ciliate, 
p lon 
x: disk 
orollas 6.5-7.5 m ong. — Cliffs and es 
2. S. squarrosa Muhl. Stem stout, 4-15 dm 
tall, white-pubescent above: ba sal rosettes 
conspicuous, their leaves with thin but ae 
blade 
, the petiole as long or longer: stem- 
leaves reduced, the lower more sharply serrate, the upper entire or nearly so: 
ads 10-12 m in nicli- involueral braets lanceola ate, pubescent, acute, all except 
r with Fani squarrose tips.—Rocky oer and hillsides, various 
aen s N of Coastal Plain, ‘‘Ga.’’ and N. Car o Ind.. Ont., and N. B.— 
Sum.-fall. 
S. Milleriana Mackenzie. Stem 3-12 dm. tall, de elosely short-hispid 
above, iae towards base: B i e wanting: eaf-blades oblong-oval, 
the larger mostly 6-8 em. long, 1.5-2 cm. wide, a nd icu: above, 
sparsely pubescent beneath, a firm, those of the lower leaves shallowly and 
dpud Dis -serrate, thos of the upper o with entire blades: petioles 
l- ong: heads 7- bh En hi ap 
ered. rici, all except the inner with spreading tips. [^*S. petiolaris 
Ait. M gras ndy pin nelands, acid soils, mostly Coastal Plain, Fla. to Ala. and 
N. —fal 
