Compositaceae 3/3 
Artificial Key to the Tribes 
A. Herbs. 
B; Hola either all tubular or the outer ligulate and the inner tubular; juice rarely 
milky. 
C.. Pappus of capillary or plumose bristles. 
D. Heads radiate. 
E. Rays yellow. 
F. Heads 3—10 cm. wide; basal leaves 2—5 dm. long, 1|—2 dm. wide, 
oblong, denticulate. INULEAE (p. 391), 
FF: Heads less than 2 cm. wide; leaves smaller. 
G. Involucre-bracts in more than 2 series. ASTEREAE (p. 375) 
GG. Involucre-bracts in ]—2 series. 
H. Rays 20—30 or more. ASTEREAE (p. 375) 
HEL Rays fewer. SENECEAE (p. 4] 1) 
EE. Rays not yellow. 
I. Flowers appearing before the foliage-leaves; staminate and _ pistillate 
flowers ‘on separate plants; foliage-leaves large, palmately lobed, all 
basal. SENECEAE (p. 411) 
II. Flowers on foliage-bearing stems, or appearing after the leaves when 
they are all basal; leaves not as above. ASTEREAE (p. 375) 
DD. Heads rayless. 
J. Heads distinctly yellow. 
K. Involucre-bracts white, many, almost hiding the few small yellow 
flowers, the most prominent feature of the head. INULEAE (p. 391) 
KK. _Involucre-bracts either not white, or not the most prominent feature 
of the head. 
L. Corolla deeply 5-lobed. CYNAREAE (p. 417) 
LL. Corolla with 4—5 merely triangular teeth. 
M.  Involucre-bracts in more than 2 series. ASTEREAE (p. 375) 
MM. Involucre-bracts in 1!—2 series. 
N. Akenes not ribbed, flattish, with O—4 lateral veins. 
ASTEREAE (p. 375) 
NN. Akenes 5—15-ribbed. SENECEAE (p. 411) 
JJ. Heads not yellow; corolla often hidden in white wool or so inconspic- 
uous that it shows little if any color. 
O. .Leaves large, palmately lobed, squash-leaf-like. SENECEAE (p. 411) 
OO. Leaves pinnately veined. 
P. Corolla deeply lobed. CyNAREAE (p. 417) 
. PP. Corolla with 4—5 merely triangular teeth. 
Q. Leaves white-woolly at least beneath. INULEAE (p. 391) 
QQ. Leaves not white-woolly. 
R. Akenes 5—1I5-ribbed or striate. XUPATOREAE (p. 374) 
RR. Aflenes flattish, 0—4-veined. ASTEREAE (p. 375) 
CC. Pappus none, or of scales, or of rigid bristles. 
S. Heads radiate. 
T. Rays yellow. 
U. Receptacle chaffy. 
Saad in most species opposite at least below; involucre not sca- 
eee ae HELIANTHEAE (p. 395) 
VV. Leaves alternate; involucre scarious. ANTHEMEAE (p. 407) 
UU. Receptacle not chaffy. 
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