Northern Prairie Wildlife Research Center
10. Aster simplex Willd. -- Panicled aster
Three varieties may be recognized among plants of this region. The var.
interior (Wieg.) Cronq. barely enters our range in extreme e NE. It
is a small-headed form with involucres mostly less than 4 mm high and pappus
ca. 3-3.5 mm long. Our other two varieties have larger heads with involucres
4-6 mm high and pappus ca. 3.5-7 mm long. Var. ramosissimus (T. & G.)
Cronq. is prevalent throughout our region and is distinguished by cauline
leaves which are 3-12 mm wide and at least 12X longer than wide. Var. simplex
is mainly e in our region and differs in having broader cauline leaves, mostly
1-3.5 cm wide and seldom over 11X longer than wide.