COiyEPOSlTACEAE (COMPOSITE FAMILY) 



219 



1-2 dm. wide, oblong, 

 . INULEAE (p. 223) 



ASTEREAE (p. 221) 



ASTEREAE (p. 221) 

 SENECEAE ( p. 232) 



ARTIFICIAL KEY TO THE TRIBES. (See also p. 218.) 

 A. Herbs. 



B. Flowers 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, 



denticulate. ... 



FF. Heads less than 2 cm. wide; leaves smaller. 

 G. Involucre bracts in more than 2 series. 

 GG. Involucre bracts in 1-2 series. 

 H. Rays 20-30 or more. 

 HH. Rays fewer. 

 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. 232) 

 n. Flowers on foliage-bearing stems, or appearing after the leaves when they 

 are all basal; leaves not as above. . ASTEREAE (p. 221) 



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. 223) 



KK. Involucre bracts either not white, or not the most prominent feature 

 of the head. , 



L. Corolla deeply 5-Iobed 



LL. Corolla with 4-5 merely triangular teeth. 

 M. Involucre bracts in more than 2 series. 

 MM. Involucre bracts in 1-2 series. 

 N. Akenes not ribbed, flattish, 0-4 lateral veins. 

 NN. Akenes s-is-ribbed. 

 JJ. Heads not yellow; corolla often hidden in white wool or so inconspicuous 

 that it show5 little if any color. 

 O. Leaves large, palmately lobed, squash-leaf-like. 

 00. Leaves pinnately veined. 

 P. Corolla deeply lobed. 

 PP. Corolla with 4-5 merely triangular teeth. 

 Q. Leaves white- woolly at least beneath. 

 QQ. Leaves not white-woolly. 

 R. Akenes 5-is-ribbed or striate. 

 RR. Akenes flattish, 0-4-veined. 

 CC. Pappus none, or of scales, or of rigid bristles. 

 S. Heads radiate. 

 T. Rays yellow. 

 U. Receptacle chaffy. 

 V. Leaves in most species opposite at least below; involucre not scarious 



HELIANTHEAE (p. 224 



CYNAREAE ^p. 235) 



ASTEREAE (p. 221) 



ASTEREAE (p. 221) 

 SENECEAE (p. 232) 



SENECEAE (p. 232) 



