stiff aster: wiry tufted perennial of the eastern United States with stiff erect rough stems, linear leaves and large violet flowers
aster: any of various chiefly fall-blooming herbs of the genus Aster with showy daisylike flowers
double leg circle: a gymnastic exercise performed on the pommel horse when the gymnast (with legs together) swings his legs in a circle while alternating hands on the pommels