INDEX-KEY 409 
* * * Bracts ciliate; teeth subcrenate ; texture coarse 
and thin ; sinus large 
A. Julianus : high-convex; lvs. ovate-acute ; hair scanty. 272 
Subdiv. E SCHREBERAN ASTERS. Heads in looser, 
neven masses ; radical colonies usually very ex- 
ies and plants much larger. 
* Radical lvs. large, thin, firm, very broadly cordate. 
T see petioles (of radicals) long, ciliate, few ; 
iddle lvs. winged, upper sessile. 
| Radicals ovate-orbic., large, thin, crenate. 
a». 
M 
[o] 
48. A. limicola: chf. stem-lvs. ovate, winged; hds. small, close. 
2 
t t Narrow petioles continuous up the stem 
| Radicals reniform or deltoid-orbicular, large, 
thick, rough. 
49. A. Schreberi: chf. stem-lvs. broad-based ; hds. large, V in. 
high. 277 
|| || Radicals oblong-cordate, large; stem tall, 
robust. 
50. A. rectifolius : some Ir. lvs. straight-sided, rough ; hds. small. 
284 
. 51. A. amnicola: chf. lvs. slant-sided, soft, webby ben.; rays long. 
286 
* * Radical lvs. ovate-cordate, smaller, thin but firm, 
dark green 
52. A. sylvicola : lvs. cordate, subentire, villous ben.; si. square. 
8 
53. A. ambiguus: lvs. broad-cordate, glabrate ; si. shallow ; late. 
291 
54. A. subcymosus: larger; lvs. cordate-ovate, glabrate, thin; t 
sharp. 2 
Subsection 3. MACROPHYLLI. Violet rays. Glands. In- 
volucre larger, broader than in 2. Pedicels tomentulose 
or at least not hairy in lines. Bracts but little ciliate. 
Radicals conspicuous. Sp. 55-84. 
Div. A. LAVENDER MACROPHYLLI. Lilac rays first 
turning lavender and then pale; seldom full violet 
Subdiv. A. Thick, heavy, flabby lvs., rough when un ; cre- 
nate-serrate teeth. 
* Stout. branching irregular; bracts polymorphous. 
