Family: Asteraceae (Sunflower family)
Height: 40 -100 cm (1 to 3 ft)
Blooming: Sept. - Oct.
Solidago riddellii Frank ex Riddell
Stem: glabrous (no hair) and erect.
Flowers: are in 30-450 yellow flowerheads. These are arranged in a flat-topped arrangement set up like stages on risers.
Leaves: the basal leaves usually wither by the time the plant flowers. The leaves are alternately arranged and fold longitudinally along the midrib leading to a sharp point. Many times the petioles are winged. The leaves have a rough texture.
Ideal condition: moist, rich soil in full sun.
SOURCES & FURTHER RESOURCES:
all photos by Nathanael Pilla
Landscape: A wonderful goldenrod for adding that fall yellow to your flowerbed. It is low maintenance and does not usually get powdery mildew as with other goldenrods.
Comments: Riddell's goldenrod is very similar to Ohio goldenrod. Riddell's goldenrod has longitudinally folded leaves and has 3 or more longitudinal veins. Ohio goldenrod has one longitudinal vein and is not folded.
Etymology: The epithet name riddellii is in honor of the botanist, John Leonard Riddell. The genus, solidago, comes from the Latin word, solida meaning "whole" and ago meanining "to make".