1346 CARDUACEAE 
. HISPIDAE 
Plant with heads medium- "mr or smallish to large, ae ms A ee borne in 
ense narrow terminal thyrse, only the lowermost (ra in axillary 
clusters: involucral bracts with tips not spreading: Suas. on flattened, 2-3 
times as long as wide: achene linear or linear-cylindric, or cylindric-clavate, glabrous 
at maturity, dull or blackish in color, not compressed. 
Involucral bracts 
Stem copiously pubescen nt, 
Li E ~ the ray cream- oun veinless or obscurely 
achene columna 5. S. bicolor. 
pies of the ray oree vello. strongly veined: 
achene broadened upward. 6. S. hispida. 
Stem glabrous or minutely puberu nt. 
Involucre 4-5.5 i racts minutely puberulent : 
achene yellowish. 7. S. erecta. 
Involucre AL mm. high: bracts strigillose: achene 
blackis 8. S. Porteri, 
Stem closely puberulent or eee eal 
bra i e obscure. 
7 m 
Blades of the leaves about the middle of the stem 
oblong-obovate, hispidulous above all over: inner 
involucral bracts Ed narrowed, oblong- l 
lanceolate, nearly 1 mm. wi 9. S. puberula. 
Blades of the leaves about n middle of the stem 
oblanceolate, strongly hispidulous above on mid- 
rib, slightly so elsewhere; inner involucral bracts 
aa Dup? narrowed above middle, very nar- 
owly lanceolate, Eo t 0.5 mm. wide. 10. S. pulverulenta. 
Stem dD a or spar ringly loosely pubescent : involucral 
bracts mostly 3-ribbed. 11. S.roanensis. 
V. CONFERTAE 
Plant with heads medium-sized to large, 6-10 m high, borne in a narrow 
large n RE involucral bracts appressed : ES strongly flattened, 253 
times as lon wide: achene linear or enr. oblong, evenly ‘dilated upward, gla- 
brous aaa dark. nec Bt maturity, truncate at the apex 
Inflorescence-branches hairy: basal leaves with narrowly to 
bro oo lanceolate to obovate Br Po uod with 
me a lateral veins conspicuous: ocks not form- 
ae War d ligneous masses. 
E cylindric; bracts narrowly c oblong, obtuse 
to acutish: achene as long as pappu 12. S. Harperi, 
insolucre campanulate; bracts DINE. very obtuse: 
pap ; 
Ligules of the ray light-yellow: thyrse large and 
broad, not strict: involucral bracts with midvein 
little ihickened, strongly dilated, In hispidu- 
lou dm blades 2.5-10 em. wi ide: basal rosettes 
Cons ic us. 13. S. conferta, 
e of. "the ray deep- iru thyr rrOW 
ds h 
d m on. wide: basal rosettes oa 
nconspicuou 14. S. rigidiuscula. 
inflorescence! branches E early glabrous: basal leaves with 
ei LARA blades: rootstocks forming very hard 
ligneo 15. S. plumosa. 
Vv. ius oq 
Plant with heads re: sized or large, 5-10 high, usually not very 
numerous, often few, bor in a thyrse E: markedly a in- 
volucral bracts aed = Ami strongly flattened, 2-3 t ng as wide 
achene narrow, pubescent, often dilated upward, truncate AC "the es 
16. S. spithamaea. 
VI. ODOR 
nt without long n stolons : a rosettes wanting or ve 
Pla 
e leaves very numerous; blades not TODE entire, T DEA 
nise- “scented, LE or slightly petioled: hea unilaterally mose, usually 
nume rou 4 high, few-flowered : Eee olacee * cylindric ; Braces SERM. narrow, 
n. stigmas Saton, longer. than wide: achene hairy, dilated upward, truncate 
at apex 
Stem pubescent in lines: leaf-blades linear-lanceolate or 
linear: pappus not exceeding the involucre at flowering 
time. 17. S. odora. 
