195. 
COMPOSITAE 
Key to Tribes 
1. Disc-flowers absent (immature ray-flowers at center 
of head may appear discoid); sap milky.......+.+e+.e+2- Cichorieae (p. 196) 
1. Disc-flowers present, ray-flowers present or absent; 
sap clear. 
2. Disc-corollas deeply cleft, resembling rays 
(true ray-flowers absent). (Also, anthers 
caudate at base; plants often prickly)............. Cynareae (p. 201) 
2. Disc-corollas with small terminal lobes or truncate. 
3. Receptacle with chaffy bracts. (Also, pappus 
of awns or chaff, or absent). 
4. Outer and sometimes inner phyllaries herbac- 
eous; style-branches usually with pointed, 
hirsute appendages; leaves usually opposite.. Heliantheae (p. 202) 
4, All phyllaries scarious-margined; style- 
branches truncate, pubescent only at the tip, 
not appendaged; leaves alternate...........-.-, Anthemideae (p. 207) 
3. Receptacle naked (occasionally with slender 
fimbrillae in Astereae (Solidago) and in 
Helenieae). (Also, pappus usually of capillary 
bristles). 
5. Style-branches long and appendaged. 
6. Pappus of awns, scales, or absent. (Also, 
style-branches usually with pointed, 
hirsute appendages).....csesscessceseceee- Helenieae (p. 209, 
Expected) 
6. Pappus of capillary bristles. 
7. Ray-flowers absent; disc-flowers 
white or lavender; style-branches 
cylindrical or clavate, glabrous or 
nearly so. 
