1366 CARDUACEAE 
Sinus usually absent: leaf-blades ovate-lanceolate, 
slit-serrate: disk often chestnut color. 
Inflorescence narrow, irregular or scant. 
Involucral bracts very os bon short, seale-like. 
Involucral bracts narrow 
Leaf-sinus oe ieee "'eaf-blades chiefly 
elli iptic- acum 
Leaf-sinus arp. leaf-blades ovate-acute. 
II. MACROPHYLLI 
Plant not very rough : ce not very thick: glandu- 
a ai 
r 
Blades of the lower ieaves serrate; sinus deep, narrow. 
Blades of ui: lower leaves coarse ely dentate ; CU shal- 
low 
Plant eens rough: leaf-blades very thick: glands 
broadly capitate. 
Leaf-sinus strongly developed: involucral bracts neither 
Squarrose nor slender. 
Sinus usually absent: involucral bracts squarrose. 
Bracts acute. 
Bracts obtuse. 
III. HETEROPHYLLI 
Leaf-blades entire or chiefly so, thick or firm. 
In volucre broadly campanulate : bracts mainly linear, 
thin: leaf-blades dull and scabrous above 
fnvolucre cylindric-campanulate; bracts mattis linear- 
su DUE rigid: leaf-blades lustrous and smooth 
abov 
Leaf-blades serrate or otherwise toothed, at least the lower 
ones. 
id not Songa; or not rough on both sides, 
ranou 
a ces Bracks PORC M or obtusish (acute in 
a variety of No. 17). 
eae with o firm blades and the chief 
D winged; inflorescence loosely narrow- 
pa 
Leaves with thin blades rough above and the 
chief Deol not winged: inflorescence broad 
pan 
Involucral carver linear-acute ius pans late, 
Le T e downy-pubesce r glabro 
6—15 dm. high: blades of the Chief leaves 
nA lan ceolate, thin, the sinus open : heads 
mpound-raceme 
Plant about 3 dm. hig : blades of the chief 
eaves falcate- lanceolate, the sinus obso- 
lescent: 1 thyrsoi 
af-blades canescent or hispid above, velvety- 
ispidulous Bion 
hi 
Leaf-blades rough on both sides, of a spongy crumbling 
Blades of the chief leaves elliptic-lanceolate, 
shallow-serrate. 
Blades of the chief leaves grass-like. 
IV. DIVERSIFOLI 
Hom leaf-forms present, no one type YT 
dominant, 
E p delicate, pubescent beneath, rough when dry: 
inflorescence broad, pois gently compound. 
m with little hair: inflores- 
Some dominant leaf-fo d Dres nt. 
Blades mus the dominant orm broad, not greatly 
ongate. 
Blades of the dominant leaves tomentulose beneath, 
ovate-elliptic, thick and rough, diminutive 
Blades of the dominant leaves sparse pubescent 
ben 
Blades of the dominant leaves elongate. 
Blades of the dominant leaves triangular-attenuate. 
Slender plant: leaf-blades chiefly petioled and 
clasping. 
wn 
11. 
13. 
19. 
20. 
22. 
ba. 
M 
Á. 
A. 
. Å. 
A. 
. A. 
A. 
A. 
. castaneus. 
. chlorolepis. 
. Boykinii. 
flexilis. 
. multiformis. 
. riciniatus. 
macrophyllus. 
commiztus. 
mirabilis. 
. Shortii. 
Camptosorus. 
. Lowrieanus. 
cordifolius. 
sagittifolius. 
plumarius. 
trigonicus. 
azureus. 
poaceus. 
undulatus. 
Proteus. 
. asperifolius. 
. sylvestris. 
truellius. 
