COMPOSITE FAMILY 



Leaves. — Three to seven inches long, lanceolate or 

 oblong-lanceolate, acuminate at apex and narrowed at 

 base, entire, wavy, ruffled or dentate at margin; rough 



Leaves of Three-Leaved Silphium. Silphium trijolidtum. 3 to 7 in. long 



above, smooth or pubescent beneath. Alternate, or 

 whorled in threes or fours. 



Flower -heads. — Yellow, two and a half to three inches 

 across. Rays linear, fifteen to twenty, pistillate and 

 fertile. Disk-iiorets perfect but sterile. Involucre of 



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