Goldenrod - Riddell's (Oligoneuron riddellii)
Flower clusters are mostly rounded and flat topped, dense to semi-open, occasionally more an open panicle than flat. The yellow flowers have 7 to 9 rays (petals), are about ¼ inch or more tall, on multiple stalked clusters at the tip of the main stem. The floral bracts are rounded and relatively broad.
Sun Exposure - Full
Soil Moisture - Wet, Medium-Wet, Medium
Height - 3 feet
Bloom Time - August, September, October
Bloom Color - Yellow
Photo courtesy of Prairie Moon Nursery.