154 TREES AND SHRUBS 



15. TETRADYMIA DC. 



Low and rigid shrubs, sometimes spinescent, canescently 

 tomentose; with alternate and sometimes fascicled narrow and entire 

 leaves, cymose or clustered heads of yellow flowers, and copious 

 white pappus. 



Leaves filiform 1 inch or more long; heads y» 



inch long. 1. t. filifolia. 



Leaves broader, oblong or lanceolate; 3 /£ inch 



long or less; heads slightly smaller. 2. T. canescens. 



