1368 CARDUACEAE 
Involucre campanulate ; 
Braets linear- elliptic : branches divaricate. 
Bracts narrow-linear or linear: branches diffuse. 
ied e leaves soft pubescent beneath: inflorescence 
IX. SQUARROSI 
Heads less than 2.5 cm. broad. 
Stem d set with small scale-like leaves: involucral 
racts but slightly spreading. 
Doro erect and adnate to the stem and its 
aves more or less reflexed, not adnate to the stem. 
Cauline leaves not markedly, ‘if at all he a not 
closely oo ae ert bracts very squ 
Heads over 2.5 € 
m widely branched : stem leaves reflexed, not 
e, very 
tone co pact: stem-leaves not reflexed, elon- 
e 
Leaves soft-pubescent: y clasping: plant little 
2n below the IBHorG ence 
Leaves not soft-pubescent : but slightly clasping: 
p ant much branched. 
nee rigid: wc lanceolate, elliptic-lanceolate, 
Stem weak: leaves Cyne like, narrowly linear. 
X. SERICEI 
Heads corymbose-paniculate: outer bracts of the involucre 
noe ovate-lanceolate, or lanceolate: achene glabrous. 
Heads virgately racemed: bracts linear-elliptic to linear- 
eaves an elliptic or narrowly elliptic 
ades 
Cauline leaves with linear-elliptic to linear-lanceo- 
late blades. 
Involucral bracts loosely spreading or recurved. 
XI. SPECTABILES 
Upper cauline leaves with broad, chiefly ovate, blades. 
UDDEL T leaves with narrow, narrowly elliptic, vary- 
ng oblanceolate, lanceola te, or linear blades. 
Involucre he hemispheric, campanulate, or turbinate-hemi- 
Tips of the involucral bracts foliaceou 
Tips a the involucral bracts neris = preaaine or 
arrose. 
Practis of the involucre glandular. 
Involucral bracts pe HAUS or obtuse: cau- 
line leaves numerous, 
m “bracts. ta tao dine to acutish tips: 
caulin 
Bracts of the ee ‘glabrous or merely ciliate. 
Involueral bracts mucronate. 
Involucral bracts acute. 
p mA igid: leaves narrowly elliptic-lance- 
stem pe leaves narrowly linear. 
Involucre nai ols turbinate. 
XII. PANICULATI 
Heads over 16 mm. broad. 
Ligules of the ray woe eae um pink or purplish. 
Leaves glabrous or 
Leaves and stem pubescent. 
Ligules of the ray "ith, eni or viole 
ip 
inflorescence crow 
Rameal i Uu narrowly linear to subulate 
blades: inflorescence widely branched, the 
heads usually solitar 
Bracts of the eae obtuse. 
Bracts of the involucre acute. 
50. 
51, 
. A. phlogifolius. 
58. 
99. 
60. 
Q 
4. 
A. patens. 
A. tenuicaulis. 
A. adnatus. 
3. 
. A. Walteri. 
. A. oblongifolius. 
. A. grandiflorus. 
. A. novae-angliae. 
A. novi- oe 
A. elodes 
A. sericeus, 
. A. concolor. 
. A. simulatus. 
. A. plumosus. 
A. Curtisii. 
. A. Smallii. 
. A. spectabilis. 
. A. surculosus. 
. A. novi-belgii. 
. A. elodes 
A. gr acilis. 
. Å. Lamarckianus. 
. A. missouriensis. 
. A. salicifolius. 
. A. turbinellus. 
. A. Simmondsii. 
